13/ Prioritising nuclear raises energy justice concerns in addition to the higher cost of 2.3% of GDP. RE promotes decentralisation, equity, and participation. Nuclear reinforces centralised regimes and burdens future generations with long-term waste management.

9/ Key results show nuclear scenarios lead to 99–115% higher levelised cost of electricity (LCOE) compared to the BPS-ref in 2050 (70.1–75.8 €/MWh vs. 35.3 €/MWh). The cost-optimal RE system is dominated by wind power (54%) and solar PV (30%).

5/ SMRs are modelled for both electricity & combined heat and power. SMR technology is not yet commercially available, posing greater financial risks than renewables with continuously declining costs. SMR investment cost consider its growth, learning rate, and economies of scale.

1/ New @lut.fi study in collaboration with European partners finds prioritising nuclear power expansion over renewable energy (RE) leads to 71–84% higher annual system costs in Finland by 2050 compared to a cost-optimised RE system. doi.org/10.1016/j.en...

I don't think the best way to solve cybersecurity issues is by building NPPs. Buying inverters with OSS and good cryptography seems cheaper and more effective to me. (Or diversify where you get your inverters.) Are you suggesting it's a good idea to hide costs by putting government on the hook.

Bottom line: nuclear has been getting away with underestimating costs for decades as far as I can see. But the most important problem (and you often say yourself): baseload is not really needed anymore. So what is the role of nuclear? Unless you go fully nuclear.

This value of diversification... I don't see it tbh. Is that in case there's no longer sun or wind? Regarding the cost of capital: I think it should actually include predictable cost overruns and hidden subsidies like government taking care of disasters and waste during 10s of thousands of years.

I'm glad that @christianonre.bsky.social increasingly includes nuclear in his analysis, if only to show that adding nuclear is really more expensive than a system running completely (100%) on renewables.

Hugely important event. As many leaders as possible should respond to invites to this. Well done @sioldridge.bsky.social and team

"External power to the Zaporizhzhia nuclear power plant...has been cut for more than four days. Emergency diesel generators are being used to power cooling & safety systems after the final power line was severed on Tuesday" www.dailymail.co.uk/wires/ap/art...

Appalling plan by this government to remove the right to Judicial review & the Aarhus convention. One has to remember Sizewell C was recommended for refusal by the govt planning inspectors & it was Kwasi Kwarteng who recklessly granted planning approval. www.theguardian.com/politics/202...

"Renewable energy microgrids could provide power to UK data centres at a lower cost and faster pace than nuclear small modular reactors (SMRs), according to new analysis from the Centre for Net Zero (CNZ)." #SayNo2SizewellC www.edie.net/data-centres...

"Global double standard: While complicit in war crimes, Rosatom continues to profit from nuclear projects in 33 countries, controlling 44% of global uranium enrichment capacity." #SayNo2SizewellC www.greenpeace.org/ukraine/en/n...

“once again drones are flying far too close to nuclear power plants, putting nuclear safety at risk...22 drones were observed in the South Ukraine plant’s monitoring zone late on Wednesday & early on Thursday, with some drones flying as close as 500 metres" www.theguardian.com/world/2025/s...

"Reports have emerged that 10 tons of uranium were released from a now-closed uranium enrichment facility almost nightly into the air between 1955 to 1993, an activity known by people who worked there at the time as ‘midnight rockets’.' www.theguardian.com/us-news/2025...

"Anybody who has seen what is going on round here will have a reaction to that sentence... because there has been no minimising of vegetation clearance [by Sizewell C] & the suggestion that they are trying to minimise vegetation clearance is laughable" #SayNo2SizewellC www.eadt.co.uk/news/2549272...

"Currently the planet is set to vastly exceed the 1.5C warming limit agreed a decade ago in Paris, with temperatures set to rise by as much as 3C (5.4F) beyond the pre-industrial average, triggering catastrophic consequences for many countries" #SayNo2SizewellC www.theguardian.com/environment/...

Nuclear power is "the only energy source with a non-zero risk of catastrophic failure and waste that stays toxic for thousands of years. Why, exactly, would we take that risk when we have multiple clean energy options with zero risk of....1/2 oilprice.com/Energy/Energ...

#Labour are relying on EDF to finish HPC & build Sizewell C, but they have other priorities 👎 "EDF will need to invest some €460bn by 2040, mainly in its domestic nuclear fleet, but rising debt & cash flow issues pose major challenges, the French Court of Auditors said" www.msn.com/en-gb/money/...

“In TASC’s view, this is yet more gaslighting from Starmer & Miliband– the truth is nuclear is not cheap, not clean & certainly not homegrown, requiring overseas uranium to operate History is littered with assertions about future benefits from nuclear...🧵👇 www.newcivilengineer.com/latest/backl...

Daily Mail letters: Dr Lowry, "Britain Remade's proposals to cut nuclear safety regulations is both dangerous & unjustified" TASC, "Sizewell C Ltd...advised Parliament in Jan 2025 that, "Sizewell C is on time & on budget...”, totally contradicting Britain Remade’s claims" #SayNo2SizewellC

At what point will they have to spend £billions on sea defences for Sizewell A B & C (A & B will still be radioactive) while a whole village is washed into the sea because they will not spend a few £million on defences.

British wildlife is in desperate straits We have a government elected to champion nature, but which is now championing its destruction It is vital that every one of us works at the local level to do everything we can to prioritise nature www.theguardian.com/environment/...

Madness that this head-in-the-sand #Labour govt risk £bns of public funds on Sizewell C when, just a short distance south at Thorpeness- "it's not going to just be the cliff that goes- it will be the whole village, which lies between Aldeburgh & Sizewell" www.bbc.co.uk/news/article...

Grossly irresponsible of #Labour to progress a program of new nuclear knowing full well there is no hope of a GDF being built unless Miliband overrides opposition by "scrapping the need for local consent" & forcing it on an unwilling rural community. www.telegraph.co.uk/business/202...

No 'change' here- #Labour's 'golden age of nuclear' at Hartlepool is likely to rip off UK consumers & taxpayers, as is happening with Sizewell C. "UK consumers will have provided assistance to develop a US reactor design that it can sell elsewhere" Do read👇 observer.co.uk/news/busines...

Well said @StopSizewellC "You [SZC Ltd] really need to stop saying the trees you’ve taken down are low value, because it just annoys people. “The reality is that really, really valued mature oak trees have been lost all over the place, & that’s what people notice." www.express.co.uk/news/uk/2110...

This is so wrong!

D'oh! Pyke blames #Homer for nuclear's failings. Reality is Sizewell C is EDF's flawed EPR design that's already doubled in cost- to be built on one of Europe's fastest eroding coasts in UK's most drought prone region- a financial & environmental disaster! www.bbc.co.uk/news/article...

Appalling, #Labour promised 'change' but it's more of the same! Ex Nuclear Minister, Lord Hunt, happy to trash environment to pursue 'growth' & endorses nuclear regulation hatchet job from right-wing thinktank, Britain Remade👇 www.theguardian.com/commentisfre... www.telegraph.co.uk/business/202...

There was plenty of wind here yesterday and still today. Made the trip through the roadworks blighting the area around Sizewell C all the more galling. We need wind and solar power not bloody nuclear stations built on an unstable coastline.

My letter published in the Times today. Rolls-Royce #nuclear 'SMR' is not an #SMR ... www.thetimes.com/comment/lett...

#RollsRoyce SMR needs big sites, standard #nuclear safety measures, exclusion zones, core catchers, aircraft crash protection, security. Calling their design an #SMR, RR 'economical with the truth' – and all that implies for their other claims, especially about time and cost.

Flogging a dying (if not already dead) horse.

And as they’re fed climate / net zero scepticism, they’re also fed support for nuclear and insufficient information on the direct and indirect subsidies to nuclear. #energysky

Net zero opponents may not be informed enough and unable to articulate nuanced view: a. we need energy mix to net zero at lowest cost (in a meaningful timeframe), b. costs need to be shared in a fair way. People fed an agenda miss those two critical points. It’s like Brexit ‘non-debate’ all over.

75% of UK govt. climate/energy funding goes to #nuclear What a waste.

#Fusion - for the last 80 years, always about to happen 10 years in the future. Perhaps an experiment to prove that time doesn't exist in #nuclear physics ?

"It is both ironic and worrying to read that the UK govt is proposing to blindly accept assessments by US safety regulators in its panic to build new #nuclear reactors" www.thetimes.com/comment/lett...

Ramana finds the perfect analogy to describe the folly of #nuclear #SMRs quoting a legendary British football manager, “We had a good team on paper. Unfortunately, the game was played on grass.” beyondnuclearinternational.org/2025/09/14/r...

Doug Parr "If these proposals for new reactors scattered around Britain really materialise, the net effect will be higher bills from nuclear's relentlessly spiralling costs, and more CO2 as we wait for the builders to overcome their inevitable construction delays" www.bbc.co.uk/news/article...

When will they learn that nuclear has humungous setup costs, and ongoing issues with waste disposal for ever and a day? I certainly wouldn't want a deal with the US, as Trump has removed pretty much all safety requirements for US companies. What's wrong with wind and solar? They're free once set up

There’s also the common argument that nuclear energy is needed to ensure baseload power — yet, as Mark Jacobson points out, the real issue is about "matching supply with demand", for which there are a number of workable solutions. Again, new nuclear is not needed. www.rinnovabili.net/business/ene...

Meanwhile not a single press or broadcast outlet seemed to approach critical voice for comment Presumably UK govt sent press release w instructions not to - it's been done before with fracking, for sure A nuclear renaissance so secure it can't tolerate a single critical, challenging voice? ENDS

Small Modular Reactors don't change this - the only concerted attempt to build a SMR in the west crashed and burned as the cost escalated and Utah municipal utility cancelled it www.utilitydive.com/news/nuscale...

Nuclear power remains dirty The cost of dealing with the spent fuel and other nuclear wastes has escalated to a plausible £54bn, but the plan for dealing with it remains "unachievable" according to Treasury assessment www.theguardian.com/environment/...

first, it's no good for climate action As Amory Lovins once said “Nuclear power actually retards climate protection because it is so expensive and slow to deploy.... Each dollar spent on a new nuclear reactor yields 10 to 40 times less carbon savings per year" rmi.org/nuclearwhyev...

UK govt infatuation with nuclear power continues. Plans for Small Modular Reactors in places around UK No SMR has ever been built in the West. Those that have been tried have faced the familiar issues of escalating costs and delays A 🧵about this nuclear agreement www.bbc.co.uk/news/article...

Former Chair US nuclear regulation (NRC), Alison MacFarlane : SMR's produce more rad-waste per kWh than 'conventional reactors. www.pnas.org/doi/10.1073/...

#Trump Starmer #nuclear safety deregulation for SMR unicorns. www.theguardian.com/business/202...