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Comments 10501 to 10550:
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michael sweet at 22:05 PM on 25 June 2019Is Nuclear Energy the Answer?
Ritchieb1234:
This headline in my local paper today gives me hope:
"Climate change expected to take center stage during this week’s Democratic debates
Recent polls show that the issue is a litmus test for many Democratic voters, and the party’s candidates have responded with more detailed and aggressive proposals than were imagined even four years ago."If we all work hard the damage can be limited. Vote Climate
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michael sweet at 21:52 PM on 25 June 2019Is Nuclear Energy the Answer?
Barry,
A bit of advice from someone who has posted at SkS for a long time:
If you continue to complain about the moderation they will ban you forever. It is a very hard job to moderate and they get little in return for their hard work. If you limit your comments to what you think is important you will be more effective in the end.
The facts speak for themselves. Adding moderation complaints detracts from your posts.
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barry17781 at 20:05 PM on 25 June 2019Is Nuclear Energy the Answer?
Here are the death rates with an USA viewpoint, please moderator do not try and hide the death rates from wind
Energy Source Mortality Rate (deaths/trillionkWhr)
Biofuel/Biomass 24,000 (21% global energy)
Solar (rooftop) 440 (< 1% global electricity)
Wind 150 (2% global electricity)
Hydro – global average 1,400 (16% global electricity)
Hydro – U.S. 5 (6% U.S. electricity)
Nuclear – global average 90 (11% global electricity w/Chern&Fukush)
Nuclear – U.S. 0.1 (19% U.S. electricity)https://www.forbes.com/sites/jamesconca/2012/06/10/energys-deathprint-a-price-always-paid/#625337e9709b
Moderator Response:[DB] If you're to present a fair-balanced argument, it needs to be a global one, for ALL forms of energy production. More than the US is involved in the replacement of the usage of fossil fuels.
Moderation complaints again snipped.
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nigelj at 18:54 PM on 25 June 2019New Research for week #25, 2019
Regarding : I’ll See It When I Believe It: Motivated Numeracy in Perceptions of Climate Change Risk.
This excellent study just confirms what I and probably others suspect intuitively. We know that many people centre their lives on a collection of fundamental ideological beliefs, and are reluctant to change their beliefs, probably because of the effort and perceived risks involved and the risk of alienating themselves from their tribe, given these shared bottom lines define the tribe. If data comes along that suggests a belief may be wrong, the smarter people are the smarter they are at fooling themselves about the data, which shouldn't actually be too surprising!
It's possible to train yourself out of this motivated reasoning, and be objective. Scientists are taught to do it. But it has a cost because it can mean criticising the views of friends and colleagues, and can alienate people from the group and the prevailing group think, so perhaps this is why its so prevalent particularly in the general public. It's just easier, but unfortunately the consequences of motivated reasoning can be serious..
All this appears to be a risk factor for both liberals and conservatives however conservatives look to me like they have particularly complex ideological belief systems, so this possibly explains the stronger motivated numeracy among the One Nation people compared to the Greens, although nobody is immune from the phenomenon. In my experience everyone has at least some cherished beliefs.
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dana1981 at 15:34 PM on 25 June 2019The Trump EPA strategy to undo Clean Power Plan
Hi nijelj. Well, the problem is that the US is left with basically nothing. As you say, Congress was unable to pass a climate bill, which left the Obama EPA with the responsibility to address the problem. If Congress could implement a price on carbon then eliminating the Clean Power Plan wouldn't be much of a problem. Unfortunately that's not the reality we currently inhabit. If we're lucky, maybe in 2021.
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barry17781 at 09:40 AM on 25 June 2019Is Nuclear Energy the Answer?
Here is an extract regarding Wind turbine fatalities for comparison(world wide i'm afraid)
http://www.caithnesswindfarms.co.uk/accidents.pdf
Of the 192 fatalities: 120 were wind industry and direct support workers (divers, construction, maintenance, engineers, etc), or small turbine owner /operators. 72 were public fatalities, including workers not directly dependent on the wind industry (e.g. transport workers). 17 bus passengers were killed in one single incident in Brazil in March 2012; 4 members of the public were killed in an aircraft crash in May 2014 and a further three members of the public killed in a transport accident in September 2014. This includes several suicides from those living close to wind turbines.
Moderator Response:[DB] Comparing global supposed wind turbine fatalities to supposed similar numbers in just the US is disingenuous.
Please note that posting comments here at SkS is a privilege, not a right. This privilege can and will be rescinded if the posting individual continues to treat adherence to the Comments Policy as optional, rather than the mandatory condition of participating in this online forum.
Moderating this site is a tiresome chore, particularly when commentators repeatedly submit posts with inflammatory tone and fallacious rhetoric. We really appreciate people's cooperation in abiding by the Comments Policy, which is largely responsible for the quality of this site.
Finally, please understand that moderation policies are not open for discussion. If you find yourself incapable of abiding by these common set of rules that everyone else observes, then a change of venues is in the offing.Please take the time to review the policy and ensure future comments are in full compliance with it. Thanks for your understanding and compliance in this matter.
Non sequitur snipped.
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barry17781 at 09:12 AM on 25 June 2019Is Nuclear Energy the Answer?
The safety culture in the US civilian nuclear industry is very high, they have had only one fatality ( 2013) in the last 30 years. Please compare this to any other industry.
(the previous fatality was in 1988)
https://en.wikipedia.org/wiki/Nuclear_reactor_accidents_in_the_United_States
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Estoma at 07:45 AM on 25 June 2019We're heading into an ice age
I was sure cherry picking was involved. I searched Tamino's site before posting here but didn't come acoss the article you posted. My search skills need improvement.
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nigelj at 07:09 AM on 25 June 2019The Trump EPA strategy to undo Clean Power Plan
Quite some history, and very convoluted, and like a huge tug of war. The history of the clean power plan initiative also includes the fact it all started when Democrats wanted a federal cap and trade scheme, but that was defeated, and so Obama was understandably frustrated so retaliated with the clean power plan idea.
It's interesting because the USA has the Environmental Protection Agency, and the UK also have a bipartian body set up to deal with climate change issues and make decisions without government interference, so the general idea is not unique to the USA. What seems to cause trouble in the USA is 1) The President has the power to select who runs the EPA and has elected fossil fuel cronies like Scott Pruitt (gone now) and Americas constitutional system allows things to be challenged by the courts seemingly forever, so ending with a stalemate and in the case of the CPP the crazy system has allowed weak and ineffectual legislation to be passed by essentially finding loopholes in the law. The UK's independent bipartisan climate body and parliamentary democracy is not as susceptible to these outcomes because it is structured differently.
But given the CPP was never the preferred option, does it matter if it gets killed off? And the regulatory mechanism in the plan is not ideal. It's more important to have a price on carbon which suggests either a cap and trade scheme or a carbon fee and dividend. The other option is for the government to simply subsidise renewable energy (the Green New Deal more or less promotes this) and given the structure of Americas constitution and its tribal politics this might be a useful approach. Both sides of politics have embraced various subsidies so the precedent is there.
Perhaps I'm wrong, but it seems logical to have either one scheme or the other, or two schemes at the most, not a confused muddle of multiple different schemes all with weak settings.
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vacnol at 07:09 AM on 25 June 2019Human CO2 is a tiny % of CO2 emissions
I made an account just to post this comment. Nice work, but I have to raise question to the statement made on carbon emmisons being the highest the've been in 15-20 millions years. While I do agree humans have been doing their part to upset the balance, while I don't feel like doing the research, I'm fairly certain major volcanic eruptions and cosmic events such as Toba and the astroid that ended the Younger Dryas period would have launched more gas into the atmosphere. May be wrong, but we always overplay the power we have vs what Earth and space are capable of.
Moderator Response:[PS] Welcome to SkS. You should do your own research if that is what you believe. It requires a certain hubris to believe that you know more than scientists working their careers in this. For volcanoes, see here. For CO2 at Younger Dryas (asteroid theory is contentious), see here. If you are going to make claims, you must support them with evidence otherwise it just sloganeering. (see the comments policy).
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Daniel Bailey at 02:23 AM on 25 June 2019We're heading into an ice age
The change in solar forcing is about -0.1W/m2, which would be made up in just 3 years of current CO2 concentration growth:
https://www.nature.com/articles/ncomms8535
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2014JD022022
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2013EF000205
https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018JD028922
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JazminePerkins at 00:33 AM on 25 June 2019We're heading into an ice age
In regards to the "what would happen if the sun went through another Maunder Minimum?" question.
Maunder minimum,is an unexplained period of drastically reduced sunspot activity, this has previously occurred between 1645 and 1715. In theory we know that the warmth of the sun can affect the earth. Thus a lack of sun could lead to decreased glacial melting and allow glacial production to increase and push outwards.
Moderator Response:[TD] A Maunder Minimum type event would merely slow down warming a little bit for one or two decades. Type “Maunder” into the search field at the top left of this page.
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Estoma at 23:27 PM on 24 June 2019IPCC is alarmist
Hope this thread is appropriate.
Over the years I've used the SKS escaltor in my blog posts from time to time. Recently I recieved a reply "it is a great example of cherry picking noisy high/low points along a period when first the PDO and then the AMO moved into their positive phases. If you remove the noise then the escalator magically disappears. What's left is two step rises. The first from 1976-1980 was the PDO going positive. The 2nd from 1993-1995 was due to the AMO going positive.
Moderator Response:[PS] Try here. Cherry picking by the way is making an argument by selecting only the part of the dataset that supports your argument. Real statistician have removed noise rigourously. See here. Sks escalator is that only deniers believe in step changes. The science shows that when internal variability is removed, then temperatures steadily rise with the increase in CO2.
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MA Rodger at 23:27 PM on 24 June 2019Antarctica is gaining ice
Ataluma @489,
Concerning ther seismological part of your comment, a 2012 book 'Waking the Giant: How a Changing Climate Triggers Earthquakes, Tsunamis, and Volcanoes' by Bill McGuire has a CarbonBrief assessment here.
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richieb1234 at 20:11 PM on 24 June 2019Is Nuclear Energy the Answer?
sidd
Great article by Bloomberg. I have been retired from NRC for 12 years. This makes me want to get reengaged.
Thanks.
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Ataluma at 16:56 PM on 24 June 2019Antarctica is gaining ice
If you semi inflate a soccer ball then put it on the floor with a weight on it , it will deform to roughly the same shape as the earth. Take the weight off and the ball becomes more of a globe shape rather than a flattened pear. When the localised weight of the Antarctic ice is removed, what happens to the rest of our connected planet . My bet is that this will give rise to a global redistribution of surface tension and an associated rise in tectonic and volcanic activity. Also possibly the weight of other continental plates will cause them to sink lower than their present position re the geoid and thus contribute to an increase in apparent sea level rise caused by continental sink. Thoughts?
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MA Rodger at 16:54 PM on 24 June 2019Planetary health and '12 years' to act
Philosopherkeys @9,
You begin your comment with a question:-
Being that the ice core samples from Greenland show that over the last 10,000 years, the earth has been on average 3 degrees celcius warmer than today, how can anyone conclude this current round of warming is entirely manmade?
The basis for this question, that Greenland core cores show today's temperature 3 deg celsius below the average of the last 10,000 years: this assertion has been addressedby Daniel Bailey @10 with a corrected version of the Easterbrook graph. Yet even the Easterbrook graph does not show today's temperature 3 deg celsius below the average of the last 10,000 years. Even the maximum of the last 10,000 years is not 3 deg C warmer than today.
So my question is: - Can you provide the source of data that does show today's temperature 3 deg celsius below the average of the last 10,000 years?
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sidd at 15:01 PM on 24 June 2019Is Nuclear Energy the Answer?
Safety standards for nukes relaxed:https://www.bloomberg.com/graphics/2019-nuclear-power-plants-climate-change/
Tell me again about strong safety culture ?
sidd
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sidd at 14:45 PM on 24 June 2019Is Nuclear Energy the Answer?
Here is a former chair of NRC (Nuclear Regulatory Commission, USA) until 2012 : nukes should be bannedhttps://www.washingtonpost.com/outlook/i-oversaw-the-us-nuclear-power-industry-now-i-think-it-should-be-banned/2019/05/16/a3b8be52-71db-11e9-9eb4-0828f5389013_story.html
sidd
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nigelj at 13:33 PM on 24 June 20192019 SkS Weekly Climate Change & Global Warming News Roundup #25
OPOF
"And defending the freedom to get away with misleading political marketing is one of the greatest harms humanity has ever inflicted upon itself.'
Yes however I feel its in the general publics hands. They need to stop voting for ignorant people who have no integrity, and who cherrypick and deceive. The public need to stop rewarding people who are dishonest and incompetent. Political Parties need to put up candidates with a record of integrity otherwise we end up with the absurd scenario last election in the USA where it became the choice of the lesser of two evils. People need to stop seeing elections as a gladatorial contest for their amusement, and realise awful candidates are exactly what they appear to be, awful, and that it will have nasty repercussions for their lives.
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michael sweet at 09:49 AM on 24 June 2019Is Nuclear Energy the Answer?
Richieb1234,
If you use CO2 from the air to make electrofuels (this could be methane, methanol, gasoline or diesel) when the fuel is burned the CO2 returns to the atmosphere. That is called "carbon neutral" because you do not add or remove CO2 from the aiir. If you capture CO2 from the air and then pump it into the ground, intending the CO2 to stay there forever, that is "removal" of CO2. Removal is often called "sequestering" the CO2.
I misunderstood you when you said "removal" of carbon from the air. Carbon neutral electrofuels seem like a good idea to me although they are not very efficient. (electric motors are over 90% efficient while internal combustion motors are often less than 25% efficient). It is also very cheap to store massive amounts of power as liquid electrofuels.
If you just pump the CO2 into the ground you have no product to sell (except cleaner air) so a tax wuld be necessary to fund the project. Most scenarios that limit warming to 2C or less include massive amounts of sequestering of carbon.
The fracking industry has never turned a profit!!! and here and Wharton. They have borrowed hundreds of billions of dollars and make no money. They will never be able to pay back their loans, the wells rapidly go down in production. They must drill more and more wells to keep up production. The entire industry is a big Ponzi scheme. I Googled "how much money has been invested in fracking". Half the articles describe frackig as a scam.
If the money wasted in fracking had been invested in renewable energy we would currently generate most of our electricity with renewable energy. Obviously there is enough money to invest in renewable energy since all the fracking money will be written off in the end.
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One Planet Only Forever at 08:07 AM on 24 June 20192019 SkS Weekly Climate Change & Global Warming News Roundup #25
nigelj @5,
I like to pair the explanation that 'everybody's actions add up to be the future' with dramatic but true points made like BBB does.
It highlights that the lack of correction to date is the problem. And a continued lack of correction of how people act continues to rapidly make things worse. That makes it clear that there is never a time when 'it is too late to make corrections'.
The pairing of that type of understanding can also clearly point out that the less corrected people are the 'worse the worst will be' and the more dramatic the required correction becomes. Today's climate impact emergency developed because, 30 years ago, global leadership of the supposedly more advanced nations did not start responsibly leading the understood to be required 'significant correction', because the understanding and correction were easily made unpopular because harmful unsustainable activity had become profitable and popular.
And there in lies the biggest barrier to improving climate science understanding. Understanding what has been happening undeniably requires accepting that freer competition for popularity and profit will develop harmful results that can be very difficult to correct. And defending the freedom to get away with misleading political marketing is one of the greatest harms humanity has ever inflicted upon itself.
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nigelj at 07:34 AM on 24 June 2019In 1982, Exxon accurately predicted global warming
DrivingBy @11, good points and I agree.
I feel companies have a moral duty to keep shareholders informed of looming problems like that oil is impacting the climate, but I would agree it is the shareholders decision as to what to do about things.
But companies do also have a legal duty to inform shareholders if there are potential financial implications and I think some oil companies have been sued on their failure to do this. I stand to be corrected.
The oil companies may not have broken the law, and have a duty to shareholders and to maximise profits, but it shows how the profit motive and paychecks crush any idealism and worse is having some real damaging effects on the environment. Perhaps the problem could be solved with laws that require greater transparency with shareholders on problems, and laws that prohibit funding think tanks if there is a possible conflict of interest. However real change is probably going to require a change of attitudes and some way of putting environmental goals on an equal footing as profit goals at the very least. Im not sure if this could be done with the law or is something that may emerge as a more voluntary thing. Some companies are at least trying this.
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nigelj at 07:11 AM on 24 June 20192019 SkS Weekly Climate Change & Global Warming News Roundup #25
Regarding BeezelyBillyBub's list of factoids. It creates a graphic picture of our dillema, but it is so "full on" people might say we are doomed, and its pointless doing anything, and this is is why I avoid writing lists like this. I would be interested in what other people think?
If we concentrate on all the considerable challenges in developing renewable energy, the small ammount so far developed, and roadblocks in the way like oil exporting countries, do we risk creating a self fullfilling prophesy of failure ?
I'm not a natural optimist, but I prefer to at least try to take a positive view and solutions focussed approach. And it's definitely not too late to mitigate the climate problem.
However we obviously shouldn't understate the problem either. Fear does motivate people, and people have a right to know about plausible worst case scenarios and can't be treated like children.
Some of the factoids in BBB's list create a false impression. Yes humans are a huge part of the earths vertebrate biomass, so were dinosaurs once, etcetera. So what? We have evolved to be the dominant apex predator and lifeform so we have to manage the situation so as to not wreck the planet in the process. We have no other choice.
Agree with OPOF's comments especially that we need a nuanced and accurate definition of hothouse earth. It's most certainly is a big problem for humanity, but it is better defined as a tropical earth with parts of the earth essentially uninhabitable for humans, but it is extremenly unlikely to turn the earth into Venus. Hyperbole will give denialists ammunition to make scientists look foolish.
We can most certainly still avoid a hothouse earth scenario. My understanding is that for hothouse earth conditions the permafrost and certain other tipping points have to be crossed and this is thought to be at plus 3 degrees c above the pre industrial basline so we still have a chance to stop this.
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william5331 at 06:31 AM on 24 June 20192019 SkS Weekly Climate Change & Global Warming News Roundup #25
The solution for the sea turtles is simplicity itself, technically, but as usual really hard in practice. Collect eggs from sea turtle beaches and transfer them to other beaches all over the place and make these beaches off limits for people (almost impossible). Presumably the turtles will return to the beaces where they have hatched and some beaches will be at the right temperatures.
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richieb1234 at 05:16 AM on 24 June 2019Is Nuclear Energy the Answer?
Michael Sweet
I cannot keep up with all the traffic. I have lost the thread completely. :-) Nevertheless, I am getting great insights from everything I see on this site.
"The problem with removing carbon is the immensity of the task and you do not make any money sequestering carbon."
I have seen papers that claim fuels from recovered CO2 can make money by competing with fossil fuels. But I have not seen any analysis to back that up.
"They think the fracking scam will go on forever."
Why do you say fracking is a scam?
Best regards
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michael sweet at 03:27 AM on 24 June 2019Is Nuclear Energy the Answer?
Richieb1234,
From your post 65:
I have to be optomistic or it is hopeless. There is no question that the situation is much less hopeless today than it was ten years ago.
I am not very familiar with the IEA. The US Energy Information Administration outlook 2019, linked in the OP, is even worse. The USEIA has consistently been years behind the curve on the adoption of renewable energy and the collapse of coal. They think the fracking scam will go on forever. I hope the IEA is also too conservative.
The IEA report clearly states that current efforts are too little. 10 years ago I do not think they would have made such a strong claim. Authorities now recognize there is a problem although they have not taken serious action.
The Lazard 2018 report (also from the OP) has a better reputation for accuracy and forecasting future trends. This graph
Shows that in the USA total renewable energy costs less than most coal and nuclear operation and maintenance costs with no mortgage. Coal and nuclear also receive very large subsidies so I think comparing subsidized renewable to the coal and nuclear is fair.
Worldwide numbers are harder to glean from Lazard but renewable is cheapest in most locations world wide. It seems to me that a carbon tax or similar regulations are very likely to be implemented in many locations in the next 10-20 years. That makes renewable the clear choice for future energy builds. Fossil plants planned 10 years ago are being finished but few new builds are starting that are not renewable.
Here is Lazard's cost comparison for all technologies:
The fact that renewable energy is the cheapest makes me hope the market will start to help correct the problem. When renewable energy was more expensive it looked hopeless.
Every year for the past 10 years I am amazed at the decline in renewable energy costs. The IEA report thinks renewable can continue to decline for more years. The lower renewable energy gets the faster it will replace fossil fuels.
I agree that we need agressive regulation to adress this emergency. Vote Climate. Carbon negative actions may make sense after all carbon generating activities have been superceded. I think wind and solar will be much cheaper to use for those activities. The problem with removing carbon is the immensity of the task and you do not make any money sequestering carbon.
I have seen a picture of the sculpture you describe. It is only too true.
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DrivingBy at 03:00 AM on 24 June 2019In 1982, Exxon accurately predicted global warming
"You would think that a fossil fuels company like Exonn knowing there was a global warming problem while knowingly funding think tanks pretending there wasn't a global warming problem infringes some form of law because it's making a misleading representation."
They were following the law which requires them to act as fiduciaries to those who buy shares of the company. I don't like their conduct in this instance and I believe they could have followed the fiduciary law without contributing to denialist think tanks, but they aren't free to publicly disparage their own product.
If Exxon had began a campaign which had the affect or even intent of convincing the public to not buy their product, management would then be putting their interests above the people that entrusted their cash to the company. Such managers would be self-branding to jump ship to the next generation of energy company, whatever that turned out to be, while trashing the value of share investors bought. The company belongs to the owners (anyone who buys shares), which is in turn mostly retirement funds. Managers are prohibited from working against the shareholders.
Fiduciary duty doesn't, at least in my mind, require political action using misleading or deceiving tactics to promote the shareholder's interests, and I think that people in responsible positions have a moral duty to interpret the laws in a moral way, e.g. "Let your yes be your yes, and your no be your no", etc. Unfortunately the idea of being honest and placing anything above material success, fame or reputation is considered horribly old-fashioned, possibly racist or at least colonial now.
From my idealist perspective, Exxon made a sad turn. In contrast, the company has an excellent record in their core business. Exxon began a comprehensive safety culture after the Valdez grounding and are known to have above-industry standards for drilling and shipping of oil. They could have complemented that by starting a renewables division while removing themselves from the public discussion of the climate issue. But ideals like that melt pretty fast in the heat of politics and paychecks, it was probably never going to happen.
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Daniel Bailey at 02:55 AM on 24 June 2019Planetary health and '12 years' to act
Global temperature reconstructions show this to be untrue.
"how can anyone conclude this current round of warming is entirely manmade?"
Because actual scientists, using the well-understood physics of our world, have established that it is only when the anthropogenic forcing is included that the observed warming can be explained.
Natural vs Anthropogenic Climate Forcings, per the NCA4, Volume 2:
Fun Factoid: Changes in the sun's output falling on the Earth are about 0.05 Watts/meter squared.
By comparison, human activities warm the Earth by about 2.83 Watts/meter squared (AR5, WG1, Chapter 8, section 8.3.2, p. 676).
"What also troubles me is the fact that the Medieval Warm Period was written out of the history books by the IPCC hockey stick graph. As well the impact of the 500 year period of cooling known as the Little Ice Age"
Another meme. Here's the "Hockey Stick For The Most Recent 1,700 Years", from the Trump Administration in 2017:
"the Earth was a lot warmer when the Vikings settled Greenland and Iceland"
Alreay refuted, but here's global temperatures with the period of the Viking occupation of Greenland highlighted:
And here's the temperatures from the GISP2 core from Greenland, with the instrumental temperature measurements taken from that same location added in for context:
"the Earth was a few degrees warmer during the Medieval Warm Period than it is today, then the polar ice cap was smaller and thinner than even now"
Your temperature claims were already refuted, but we have observational data to 1850 and proxy data going back millennia documenting Arctic sea ice extent changes over time.
For example, here's the last 1,500 years, from NOAA's Arctic Report card 2017:
You'll need to raise your game to compete in this venue. In this venue, the onus is on YOU to be able to support your claims (each claim) with source citations, preferably to credible sources. Further, many of your claims are already refuted on separate posts here (thousands exist, use the Search function to find the most appropriate post to make your claims and to stake your reputation on).
I'm sure that the moderation staff would prefer to not intervene here, but I'm equally sure that they will if you continue to post what is essentially a Gish Gallop of memes refuted many times before (PRATT).
Read the Comments Policy and construct your comments to comply with it and my advice to you and all will be fine.
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One Planet Only Forever at 02:41 AM on 24 June 20192019 SkS Weekly Climate Change & Global Warming News Roundup #25
BeezelyBillyBub,
Improving awareness and correcting understanding need to be understood to be the objectives (of every person who is trying to be helpful).
Try to avoid using terms that are open to too much interpretation. Divisive resistance to correction and improvement thrives on opportunities to make-up misleading claims that would appeal to people who are inclined to dislike their awareness and understanding being improved in a way that would challenge their developed perceptions of status (prosperity, helpfulness, opportunity for more personal benefit, ...), for themselves or any sub-tribe of global humanity they identify with.
And it is more helpful to point people to more robust presentations of understanding like the Sustainable Development Goals.
It may take more words to describe things in more detail, but when trying to be clear, fewer words can result in run-away popularity of misleading counter-claims. Less detail can make it easier to abuse motivated reasoning or confirmation bias to dismiss a presentation of information. I support the presentation of 'worst case future results', but only with a detailed presentation of the basis for the worst case.
"Runaway hothouse earth" may be interpreted as "Earth becoming Venus".
The nasty thing about global warming impacts is indeed the way that exceeding each tipping point starts something harmful that adds to the total impacts even without more impact from humans, and may be practically impossible for humans to completely stop or reverse (unlike the ending of fossil fuel use and other harmful developed human activities). However, my understanding is that the best developed understanding is that Earth is almost impossible to be impacted by human impacts to a degree that triggers tipping-points that would result in Earth becoming like Venus. And my understanding is that the tipping-points will not do what you have claimed (5 triggered below 2.0 C warming that are unstoppable and inevitably trigger the other tipping points in a runaway warming leading to Venus-like conditions on Earth).
I see the simple undeniable beauty of the other brief points made. But the 'runaway hothouse earth' and 'runaway mass extinction' points need more details or a different simple wording (I do not have alternative simple wording alternatives to offer)
What needs to be presented is how the amplification of the feed-backs of each of the tipping points will add up, how each one takes away the potential for human corrective actions to reverse what has been done.
That concern may be well explained by starting with the understanding that future reality is the sum of the actions of every person through the string of progressive moments in time. Everybody's impacts add up. Any harmful impact that accumulates collectively contributes to the "Harm Done". That is why people cannot be allowed to 'believe what they want and do as they please' (even though that understanding is understandably unpopular). Helpful people may even be able to substantially remove CO2 from the atmosphere or other corrective actions, but if harmful people are still able to be harmful the Helpful people's actions are just attempts to try to limit how much worse things will be, not able to 'make things better'.
Every person choosing a harmful action makes the problem worse, no matter how much the helpful people reduce their own impacts. That leads to the need to explain why less fortunate people should be allowed to create impacts and must be helped by the more fortunate to live at least basic decent lives that are not harmful to the future of humanity. Claiming that the supposedly less advanced, less fortunate should know better and behave better before "all" of the more fortunate people behave more helpfully (less harmfully) is 'absurd'. Which leads to the need, and opportunity, to explain that Helpfully Altruism must Govern and Limit the behaviour of everyone, especially Governing the actions of the supposed winners/leaders (if they did not and do not Self-Govern by Helpful Altruism they do not deserve their status).
Each tipping point has a "life of its own", adding to the collective impacts. But, unlike human impacts that can be reduced and even reversed by helpful human actions over-powering the harmful impacts of Others, tipping points can be harder for humans to "put back in the box they came out of". An example is the way that changes of Ocean Chemistry due to the human production of massive amounts of excess new CO2 are very hard for humans to reverse. Even reducing atmospheric levels of CO2 would not significantly reverse the Ocean chemistry changes, or the related impacts on Ocean Biodiversity.
And added information that could be helpful would be the detailed presentation of the likely amplification of global warming by each tipping-point triggered result.
That is a lot more difficult to present than saying 'Runaway hothouse Earth'. But it can short-circuit any attempt to create a potentially popular misleading counter-claim. The refutation of the counter-claim would likely be able to be shown to be part of the initial presentation of information that the person is trying to discredit.
However, I can suggest a simple brief comment that is difficult to create misleading counter-claims of. I recommend pointing people to more robust presentations of collective understanding of what is required for the future of humanity. People should be pointed to the Sustainable Development Goals, which includes a Climate Action Goal which has things like the IPCC Reports as 'part' of its basis. The SDGs are open to improvement, but they are undeniably what need to be Governing human activity, especially the activity of Winners/Leaders who want to sustain their developed perceptions of Status.
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michael sweet at 02:40 AM on 24 June 2019Is Nuclear Energy the Answer?
Richieb1234,
In answer to your post 63:
Re: proliferation. I think most opponents of Nuclear think proliferation is an important point while supporters think it is not a problem. We will have to disagree. Any nuclear facilities make proliferation easier. It is extremely difficult to justify building a centrifuge facility if you do not have any civilian reactors. I agree with you that it is not one of the most important reasons to not build nuclear.
I think the point is that there are a lot of problems with nuclear. Do we really want to deal with the hassel? Look at current problems in Iran.
Your comments on breeder reactors seem simiilar to my feelings. I have noticed that all estimates of the cost of breeder reactors do not include the reprocessing plant. I have heard that the process of repurification is not complete. It would be a lot of radiation to work with.
I think Thorium reactors are all breeder reactors. Does that mean you think thorium is unlikely to be widely used?
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Philosopherkeys at 01:15 AM on 24 June 2019Planetary health and '12 years' to act
Being that the ice core samples from Greenland show that over the last 10,000 years, the earth has been on average 3 degrees celcius warmer than today, how can anyone conclude this current round of warming is entirely manmade? What also troubles me is the fact that the Medieval Warm Period was written out of the history books by the IPCC hockey stick graph. As well the impact of the 500 year period of cooling known as the Little Ice Age was not acknowledged by the hockey stick graph. Brian Fagan in his book, "The Little Ice Age" describes how glaciers in the European Alps or New Zealand in the Southern Hemisphere began growing once the earth began to cool. Entire villages and swaths of rainforest were obliterated by advancing glaciers. The hockey stick graph ignores the fact that the Earth was a lot warmer when the Vikings settled Greenland and Iceland. If as the ice core samples show, the Earth was a few degrees warmer during the Medieval Warm Period than it is today, then the polar ice cap was smaller and thinner than even now and quite possibly the alarm being sounded by certain climate scientists is uncalled for as this is a normal cycle that goes back and forth.
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richieb1234 at 22:50 PM on 23 June 2019Is Nuclear Energy the Answer?
Michael Sweet
Thanks for the link to the IEA executive summary on renewable energy.
You concluded, "We should put all our money on the cheapest energy today: wind and solar PV. Using existing gas peaker plants 90% of electricity can be generated using wind and solar. Then we convert all cars, industry and heat to electric. Once we have 90% of the economy renewable we will have to figure out the last 10%. Perhaps some electrofuels."
My reading of the IEA report and similar projections is not as optimistic as yours. IEA projects a 20% growth in renewables' share of global energy usage in the five year period from 2018 - 2023, which would then total 12.4% of global energy. That is equivalent to doubling renewables' share every 18 or so years; i.e. a 25% share of global energy usage by 2040. One might speculate that renewables will grow more quickly in the years after 2023. But renewables are already subsidized and/or mandated in developed countries like Germany, and even in the US, where federal and state incentives have been important drivers for renewables.
There is a sculpture in Berlin that depicts politicians debating climate change in water up to their ears. This summarizes my confidence that we will solve global warming through international commitment to conservation, efficiency, and converting our energy infrastructure to renewables. I am beginning to lean towards those who think we should aggressively pursue carbon-negative technology powered by an energy-intensive, carbon-neutral electricity source like nuclear.
Best regards
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michael sweet at 22:33 PM on 23 June 2019Is Nuclear Energy the Answer?
Postkey:
Your link is a really good reference for coal plants. An OP on SkS would be worthwhile. Even just a simple OP like this one.
You quoted the first paragraph of the article. The second is:
"More recently, 227GW has closed due to a wave of retirements across the EU and US. Combined with a rapid slowdown in the number of new plants being built, this means the number of coal units operating around the world fell for the first time in 2018, Carbon Brief analysis suggests." my emphasis.
There are too many items for me to copy them all, I urge anyone interested in coal plants to read the article, it is easy to read.
There are discouraging builds of new plants. There are many more encouraging instances of plants closing or planned plants being cancelled, even a few finished plants not opening. I prefer to see the glass as mostly full.
I stand behind my statement:
"energy planing is generally long range. It takes 5-10 years to build baseload fossil and nuclear plants. That means it takes 5-10 years to stop the train and get renewable energy on board. Renewable has only been cheapest for 3 or 4 years. No-one anticipated the phenominal drop [in price] in wind and solar power." in price added.
While we would all prefer for all fossil to be replaced today with renewable, it takes time to make such a change. Since building and operating a new renewable plant is cheaper than simply running a coal plant in many areas (in a short time it will be everywhere) it is only a matter of time. Pray it is sooner rather than later.
If the USA takes a lead in changing to renewables instead of dragging everyone else backwards we have a chance. The technology exists, nothing needs to be invented.
Encourage everyone you know to VOTE CLIMATE!
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BeezelyBillyBub at 22:29 PM on 23 June 20192019 SkS Weekly Climate Change & Global Warming News Roundup #25
If you are 15 years old, emissions rose 30% in your lifetime.
If you are 30 years old, emissions rose 60% in your lifetime.
In the next 10 years, emissions will rise 10% at least.
After 30 years of trying, solar and wind are 2% of total world energy use.
To avoid 2 C, emissions must drop 50% in 10 years, and 100% in 20 years.
5 of 13 major tipping points are triggered like dominos below 2 C.
When these 5 tipping points begin, they reinforce each other and trigger the other 8.
Runaway hothouse earth cannot be stopped or reversed once started.
The earth will take many, many thousands of years to recover.
Runaway mass extinction cannot be stopped or reversed once started.
The earth will take many millions of years to recover.
Nobody wants to admit it.
There are 25 billion chickens on earth.
Humans and livestock are 98% of all land vertebrate biomass.
10,000 years ago, humans and livestock were 0.03% of all land vertebrate biomass.
All male vertebrates are being biologically emasculated, feminized, sterilized, stupified and crazyfied.
If you want tons of data on how and why, go to Loki's Revenge Blog and read: The Withering Bones of Humanity
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richieb1234 at 20:47 PM on 23 June 2019Is Nuclear Energy the Answer?
Michael Sweet
"Ten years ago I had little hope for change. The situation has completely changed because wind and solar energy are now the cheapest energy on the planet."
I hope you are right.
"If you could comment on one more section of Abbott each week we eventually would have discussed them all."
Here are my views on Abott's issues VII "The Prolifieration Problem" and XI "Fast Breeder Reactors."
In the late 1970s at Los Alamos, a group of us did a comparative analysis of nuclear fuel cycles including the current light- water once-through; the plutonium breeder; the Uranium-Plutonium-Thorium hybrid; and the fusion-fission hybrid. We looked at technical feasibiity, economics, environmental factors, proliferation and societal issues such as public acceptance. Unfortunately the reports are not publically available and some of the analyses are out of date now. However, there are two conclusions that have held up.
Regarding proliferation, we concluded that reactors would not be the preferred route to proliferation in the coming decades. Although proliferating countries had used reactors combined with reprocessing in the previous decades, we felt that the coming availability of centrifuge enrichment technology would give proliferators an equally attractive option of enriching Uranium. That seems to be borne out by experience since then. In today's world, I believe proliferation is now a political problem, not a technical one. So I do not consider proliferation a convincing argument against nuclear power.
Regarding breeder cycles in general, we noted that they all require a sustained national commitment to assure the high degree of coordination required among breeder reactor, burner reactor and reprocessing plant construction, including regultory approval for all facilities. A high degree of national commitment is not the hallmark of democratic governments except in time of war. The Clinch River demonstration breeder reactor was cancelled in 1983. So I agree with Abbott that implementing a breeder cycle to capture the benefits of U-238 fissionable material is not a likely outcome.
Best regards
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Postkey at 19:08 PM on 23 June 2019Is Nuclear Energy the Answer?
“Since 2000, the world has doubled its coal-fired power capacity to around 2,000 gigawatts (GW) after explosive growth in China and India. A further 236GW is being built and 336GW is planned.”
https://www.carbonbrief.org/mapped-worlds-coal-power-plants
Moderator Response:[DB] Shortened link breaking page formatting. In your link, the question mark and everything to the right of it were extraneous.
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bozzza at 18:29 PM on 23 June 2019In 1982, Exxon accurately predicted global warming
"I'll be be back!" (..in amonth, lol!)
Moderator Response:[DB] Please limit image widths to 450.
[PS] This is also somewhat offtopic. The weekly news roundup thread would be more appropriate.
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barry17781 at 12:05 PM on 23 June 2019Is Nuclear Energy the Answer?
The reference to the quote seem to have dropped off
"The high cost and low availability of hafnium limit its use in civilian reactors, although it is used in some US Navy reactors."
https://en.wikipedia.org/wiki/Control_rod
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michael sweet at 11:15 AM on 23 June 2019Is Nuclear Energy the Answer?
Ritchieb1234,
Ten years ago I had little hope for change. The situation has completely changed because wind and solar energy are now the cheapest energy on the planet. Very few new coal plants are being started. Unfortunately, coal plants planned 5-10 years ago are being fiished.
Even with Trump trying to support coal, more coal plants have shut down in Trumps first two years than Obama's first 4 years. Gas is only cheaper because of fracking. I think fracking is a Ponzi scheme, they have never made a profit. Once fracking crashes, renewable will be by far the cheapest energy.
As you know, energy planing is generally long range. It takes 5-10 years to build baseload fossil and nuclear plants. That means it takes 5-10 years to stop the train and get renewable energy on board. Renewable has only been cheapest for 3 or 4 years. No-one anticipated the phenominal drop in wind and solar power.
Over 50% of all new electricity in the world in 2017 was renewable energy IEA report for 2018. 10 years ago that looked impossible. Plans like Jacobson 2018 and Connelly 2016 linked above show that it is possible to generate all power using renewables. It saves money compared to BAU!! More heat and industry is being converted to electricity. The IEA report linked describes large increases in bioenergy which Jacobson does not use at all (he thinks it is too polluting). I like the idea of electrofuels to store excess power long term and power industries like airplanes and ships.
Renewable energy also avoids much of the pollution we are exposed to every day. That is especially important in developing countries and is a great reason by itself to convert to renewables.
I think that if we go all in with renewable energy we can reduce the damage caused by fossil fuel use. The sooner we start the more damage we dodge. Unfortunately, the Republicans stand in the way. Every record hot day in summer or record flood more people are convinced we need to do something. Will it be enough by 2020??
I do not think nuclear will be able to help out. It is too costly and takes too long to build. Even if NuScale works out it will be 2030 before they are in limited production, and I doubt it will be as cheap as solar and wind. That is too late. I think Abbott is correct that enough materials to build the plants do not exist. If nuclear provides less than 5% of all power it is simply a distraction. (currently nuclear is about 2-3% of all power).
We should put all our money on the cheapest energy today: wind and solar PV. Using existing gas peaker plants 90% of electricity can be generated using wind and solar. Then we convert all cars, industry and heat to electric. Once we have 90% of the economy renewable we will have to figure out the last 10%. Perhaps some electrofuels.
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barry17781 at 11:00 AM on 23 June 2019Is Nuclear Energy the Answer?
My considered comment
"as for hafnium in civilian reactors I stand by it that it is currently not used to any significant extent"
Barry 6:25 11 June 2019
Yet Mr sweets comment were
"Your primary objeciton to Abbott and here 2011 is your claim that hafnium is not used in civilian reactors.
michael sweet at 21:28 PM on 14 June 2019"
A compete distortion of my post which was to point out that halfnium was just one element that can be used as a control or scram rod and there were pleanty of other materials available and boron was cheap cheerful and abundant, and readily obtainable, and so there was no restraint on the availbilty of absorber materials, which seemd to go agaist the preconceptions that if it was mentioned in Abbott, peer review paper then it must be essential!
"The high cost and low availability of hafnium limit its use in civilian reactors, although it is used in some US Navy reactors."
Indeed we may well regard ourselves be in asituation, now in where Halfnium being limited simply by the military having the first pick and deeper pockets than the civilians
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Philippe Chantreau at 10:45 AM on 23 June 2019In 1982, Exxon accurately predicted global warming
OPOF is right, it is impossible to predict the minimum extent that far in advance with any kind of accuracy. From what I have seen while following sea ice over the years, it appears that weather events, especially winds that scatter the ice and flush it to the South, are major determinants of the final minimum.
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One Planet Only Forever at 10:29 AM on 23 June 2019In 1982, Exxon accurately predicted global warming
bozzza @3,
I check the NSIDC Arctic Sea Ice News and Analysis reasonably regularly, particularly their Charctic Interactive Sea Ice Graph. And I occasionally look at the Arctic ROOS data presentations.
Comparing the current year at this date with other years in the easy to work with Charctic interactive tool, this year at this time is very similar to 2010, 2011, 2012, 2016, 2017 and 2018.
Each of those years have very different final minimums. And some years that had less ice area loss by this time of year ended up with very low minimums (2015 and 2007).
A lot of variation of rate of ice loss can happen. This year's ice area loss rate recently levelled off from June 12 to June 17 (almost no change of extent through those dates. So if you were looking at data before June 12 it certainly would have looked like 2019 was on track to have a lower minimum than 2012.
A long time ago I read a caution about forecasting sea ice minimums based on the data up to this time of year. I would wait at least one more month before feeling fairly sure about what the minimum would likely be this year.
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barry17781 at 10:06 AM on 23 June 2019Is Nuclear Energy the Answer?
Mr sweet,
"As you can see from Barry and Dpeppigrass's posts on this thread, the normal level of discussion of nuclear on line is very low. In my mind it makes nuclear look bad when the only people who favor nuclear are so uninformed. If the nuclear industry wants to start over they need to address people like SkS who want to make informed decisions."
Mr sweet , I am a nuclear engineer with over 35 years experience as an advisor in the industry in 5 countries, yet your great experience seems to be in holding a yttrium source in the hand and distorting any viewpoint that you do not like.
I am afraid that your continued insulting and misepresentationhas not had any usefull ness in raising the tone of this what you would loosely call a discussion, but seems to be a platform for your prejudiced views.
Richie has not yet referenced a singe Peer reviewd
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nigelj at 08:11 AM on 23 June 20192019 SkS Weekly Climate Change & Global Warming News Roundup #25
Corn based ethanol and similar crop based ethanols look increasingly like a failed idea. Looking at the article above the majority of the studies appear to suggest corn ethanol has no advantages over other options, or at best a small advantage. Displacing millions of hectares of forests and other crops for at best a possible small advantage looks like insanity to me.The risks of losing considerable areas of cropland and forests do not justify this.
Corn is claimed but not proven to sequester good levels of carbon, and is also used as cattle feed in intensive farming, but there is also some evidence that the alternative of feeding cattle on open grasslands with rotational grazing sequesters soil carbon and is an alternative to corn feed. So this alternative should at least be considered in the 'modelling'. Of course it does put pressure on land so this needs to be also considered.
We need to be asking what do we 'really' need biofuels for? Perhaps aviation fuel, and to power shipping and long haul trucking because electrifying these things is going to be challenging. Blending corn ethanol in petrol for cars is stupidity, because we have electric cars and once you get above a token blend of about 20% ethanol engine's cant handle it. Token blends simply dont achieve anything of significance to my way of thinking.
We have other options for biofuels that don't compromise forests and crop lands. I recall reading biofuels can be made from scrub grown on waste land, harvesting grasses, growing algae and from various other waste materials. This may not be as economic short term as corn biofuels, but in the long term this doesn't disrupt other essential land uses. It may be enough to fuel things that cannot be electrified. Someone needs to work that one out, and it will give a better picture of whether corn biofuels are of any use.
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Philippe Chantreau at 06:53 AM on 23 June 2019In 1982, Exxon accurately predicted global warming
Bozzza @5: There is nothing normal about this. The immense area of free water North of Siberia, the one next to Severnya Zemlya, all of the Alaskan and Yukon coasts ice free, most of that of the Northwest Territories except for the vicinity of Victoria Island. Although things slowed down a bit in June this year, the extent is pretty much on par with the 2012 extent after it had experienced its abrupt June decline. Add to that the nearly absent ice in the Bering sea through the winter. As NSIDC says, the stage is set. Even though it is early in the season, it is hard to see how this year could not be very close to 2012. Any major wind event will likely yield to a new record low.
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nigelj at 06:47 AM on 23 June 2019In 1982, Exxon accurately predicted global warming
Washinton Post :Temperatures leap 40 degrees above normal as the Arctic Ocean and Greenland ice sheet see record June melting
Sure is quite something. Seems to be a big stationary high over the arctic. I wonder if the reduction in temperature differential from equator to the arctic due to climate change is causing highs to build up and hang around over the arctic? Absolute pure speculation.
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richieb1234 at 06:46 AM on 23 June 2019Is Nuclear Energy the Answer?
Michael Sweet
I am on a steep learning curve. I started out to create a simple course on climate change for my 12 year old granddaughter, but I keep getting more deeply interested in the science.
Since my retirement from NRC, I have done extensive consulting and training in developing countries and at the IAEA. The perspective I have is that the interests of climate change activists, and those of reactor vendors and those of countries looking for future energy do not necessarily line up. I don't see any of these countries buying a Gen IV reactor until it has been successfully operated in a country with real nuclear experience. Each country has its own decision process, its own regulatory process and its own financial challenges. As you know, there is no global authority empowered to deal with global warming.
Call me a pessimist, but global warming is not going to be on a fast track to resolution in the next decade. It would not surprise me to see CO2 emissions rising every year from now until then. In the meantime, the vendors and the potential customers will pursue their own interests, not solution to warming. If nuclear can be added to plans like the Green New Deal, I would suggest the most productive area of emphasis would be aggressive regulatory reform; i.e. to develop a regulatory framework designed for a climate change strategy for nuclear rather than an electicity grid strategy for nuclear. By a climate change strategy I mean large numbers of nuclear plants sited in remote locations for the express purpose of producing synthetic fuels from CO2 in the atmosphere.
I need to sign off now. I would be interested in your view of that perspective.
Best regards
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michael sweet at 22:52 PM on 22 June 2019Is Nuclear Energy the Answer?
Richied1234,
I look forward to your responses to Abbott's paper. I have grave doubts that NuScale can deliver on their claims. It will be interesting to see what the response is to Abbotts remaining issues.
As you can see from Barry and Dpeppigrass's posts on this thread, the normal level of discussion of nuclear on line is very low. In my mind it makes nuclear look bad when the only people who favor nuclear are so uninformed. If the nuclear industry wants to start over they need to address people like SkS who want to make informed decisions.
I have only read a handful of academic renewable all power plans (like Jacobson 2018, Connelly 2016 and Aghahosseai et al 2019 (Connelly and Aghahosseai use electrofuels). My impression is that all of those plans incorporate zero nuclear power. If all the long range plans by skilled engineers omit nuclear it is hard for me to see a path where significant nuclear is used. An industry that can lose $2 billion on the cancelled Wales plant Barry references and $1.5 billlion on a plant at Crystal River, Florida (near where I live) where they never even applied for a permit to build, should be able to find a few million to produce academic papers that show it is a real option for the future.
Many newspaper articles I see make nuclear builds look like a giant scam to rip off utility customers (for example Crystal River and large numbers of generals selling nuclear plans to Saudi Arabia).
I think the logarithmic relationship of CO2 concentration to temperature comes from Beers Law. Concentration = k[-log(transmission of light)]. There are some different formulations of Beers law, the key is log transmission is proportional to concentration. (Absorbance is directly proportional to concentration).
One important point to recognize is the concentration of CO2 at the surface is not as important as the concentration at the escape altitude of radiation (about 10 km up in the atmosphere). The escape altitude is very important.
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richieb1234 at 22:11 PM on 22 June 2019Is Nuclear Energy the Answer?
Michael Sweet
"In your first post you said the current fleet of nuclear reactors has an accident rate of 1 per 10,000 reactor-years."
I believe there are two tiers of operating Gen III plants: those where the operating company has a strong safety culture, and the regulatory body is independent and competent; and those where these two criteria are not met. In round numbers, I think operating experience justifies a core damage frequency in the range of 1 in 10,000 reactor years for the former group and 1 in 1,000 reactor years for the latter group. The historical data includes full and partial core melt accidents, as well as precursor events; i.e. close calls. The TMI, Fukushima and Chernobyl accidents fall into the second category. So, I am in general agreement with Abbott. I believe that most nuclear countries today fall into my first catagory, but I cannot provide evidence to support that claim. I am pretty confident that the curent situation in the US is favorable, and there is good reason to believe the US Gen III plants can complete their life cycles wihout another core damage accident. [But I have been wrong before. :-)]
"If you built out 50,000 modular reactors with an accident rate of 1 in 100,000 reactor years, you would have a big accident every other year somewhere. That would be 100 times safer than Abbott claims. How safe are those modular reactor designs?"
My basis for believing that [at least some] small modular reactors are qualitatively safer than GEN III plants is outlined in previous posts; i.e., elimination of the most challenging accident sequences, much slower accident progression and heat removal by natural processes.
Yes, with a postulated 50,000 plants spread around the world, it is easy to imagine core damage accidents occurring on a more regular basis, although I would be reluctant to assign a frequency number. As I have said elsewhere, I believe the greatest threat to SMRs is deliberate sabotage. Great pains will have to be taken to assure security.
Best regards
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