Frequently Asked Questions

Nuclear electricity costs $141–222 per MWh (Lazard LCOE+ 2025), while onshore wind costs $27–73/MWh — roughly one-third the price. Solar PV globally averages $0.043/kWh, making it 41% cheaper than the cheapest fossil fuel alternative. Nuclear costs have doubled since 2011. Every dollar spent on nuclear buys significantly less carbon reduction than the same dollar spent on wind or solar.

Sources: Lazard LCOE+ 2025, IRENA Renewable Power Generation Costs 2024

Cost overruns are the norm, not the exception. France’s Flamanville EPR went from €3.3 billion to €13.2 billion (4x over budget) and was 12 years late. The UK’s Hinkley Point C ballooned from £18 billion to approximately £49 billion. The US Vogtle plant doubled from $14 billion to over $35 billion, costing Georgia ratepayers an extra $420 per year on average. 75% of reactors under construction worldwide are currently facing delays.

Sources: World Nuclear Industry Status Report 2024/2025, Power Magazine, NucNet

Taxpayers and ratepayers. Under the US Price-Anderson Act, the nuclear industry is liable for only the first $16.1 billion in damages — less than 2% of the estimated $560 billion potential cost of a major accident. Fukushima cleanup costs are projected at $230–530 billion. Chernobyl has cost an estimated $700 billion over 30 years, with Ukraine still spending 5–7% of its annual budget on the consequences.

Sources: Public Citizen, Japan Center for Economic Research, USC Global Health

No. Nuclear plants take 10–20 years from decision to operation. In 2024, renewables added 448 GW of new capacity globally — nuclear adds that much in an entire year as renewables add in just two days. Only 7 reactors connected to the grid worldwide in 2024. To meet climate targets by 2030 or 2035, we need solutions deployable in months, not decades.

Sources: World Nuclear Industry Status Report 2023/2024, IEA World Energy Outlook 2025, IRENA

Shrinking. Nuclear’s share dropped to 9% in 2024 — a 45-year low — down from a peak of 17.5% in 1996. There are 408 reactors operating worldwide, still 30 below the 2002 peak of 438. Meanwhile, solar and wind combined now generate 88% more electricity than all nuclear plants. In 2023, 92% of all new power capacity came from renewables.

Sources: Ember Global Electricity Review 2025, World Nuclear Industry Status Report 2025, IRENA

Fukushima (2011) has already cost over $180 billion, with independent estimates reaching $230–530 billion. Decommissioning alone will take another 30+ years. Chernobyl cost an estimated $700 billion across affected countries. Belarus suffered $235 billion in damages; 784,320 hectares of agricultural land were permanently removed from use. These costs dwarf any economic benefit from the electricity these plants produced.

Sources: Nikkei Asia, Science Magazine, USC Global Health Report

Yes. Nuclear fuel cycle technologies are inherently dual-use. Uranium enrichment for reactors requires only 4–5 additional enrichment passes to produce weapons-grade material. A typical 1,000 MWe reactor produces several hundred kilograms of plutonium during normal operation. Claims that light-water reactors are “proliferation resistant” have been debunked by experts at the Nuclear Threat Initiative and Lawrence Livermore National Laboratory.

Sources: Nuclear Threat Initiative (NTI), Lawrence Livermore National Laboratory

Nuclear plants need massive water volumes for cooling and are typically built on rivers or coastlines. Droughts and rising water temperatures have forced shutdowns or reduced output in France, Germany, Switzerland, Belgium, Spain, and Romania. The risk of exceeding thermal discharge limits more than doubles between now and the 2060s. Sea level rise adds coastal flooding risk. Nuclear power is increasingly vulnerable to the very crisis it claims to solve.

Sources: ScienceDirect (2025), French nuclear fleet curtailment data

Yes. Over 350,000 tonnes of high-level radioactive waste exist worldwide with no permanent safe storage anywhere. The US alone has over 90,000 metric tons of spent fuel with no repository — the Yucca Mountain project has been stalled since 2010. Finland is the only country on track to begin deep geological burial, after decades of planning. This waste remains hazardous for over 100,000 years — longer than human civilization has existed.

Sources: Uranium Atlas (Rosa-Luxemburg-Stiftung), US Government Accountability Office, Greenpeace “Global Crisis of Nuclear Waste” report

Uranium mining disproportionately harms Indigenous communities — a form of environmental racism. On the Navajo Nation (USA), over 500 abandoned mines contaminate land and water. More than 3,000 Diné workers mined uranium in the 1950s without protective equipment or knowledge of health risks, bringing radioactive dust home to their families. Birth defects, kidney disease, and cancer rates remain elevated. 20–30% of Navajo Nation lacks public water systems, and unregulated sources regularly exceed EPA contamination limits.

Sources: Uranium Atlas, Environmental Health Perspectives (NIH), University of New Mexico

No. While reactors don’t emit CO₂ during operation, the full lifecycle — uranium mining, fuel enrichment, plant construction (massive concrete and steel), and waste management — produces greenhouse gas emissions. The IPCC puts nuclear at a median of 12g CO₂eq/kWh, comparable to wind (4–12g) and only marginally lower than solar (5–6g). The “low-carbon” argument for nuclear applies equally to renewables, which are cheaper, faster, and carry none of the waste or accident risks.

Sources: IPCC, UNECE 2022, Carbon Brief, DNTC report “Climate Change and Nuclear Power”

No evidence supports this. The most advanced SMR project — NuScale’s Carbon Free Power Project in the US — was cancelled in November 2023 after costs tripled from $3 billion to $9.3 billion and electricity costs rose 53% to $89/MWh. Only 26% of required subscriptions were secured despite $232 million in DOE funding. The Institute for Energy Economics and Financial Analysis concluded in 2024 that SMRs are “Still Too Expensive, Too Slow, Too Risky.” No SMR has met projected 3–4 year construction timelines anywhere in the world.

Sources: Utility Dive, IEEFA (May 2024), World Nuclear Industry Status Report 2025

Yes. In 2024, renewables accounted for 92% of all new power capacity globally. Solar and wind combined already generate 88% more electricity than nuclear. Battery storage costs have dropped over 90% in a decade. The International Energy Agency confirms that a combination of solar, wind, efficiency, and storage can meet global energy needs. The question is no longer whether renewables can replace fossil fuels — it’s how fast we deploy them.

Sources: IRENA, IEA World Energy Outlook, Lazard LCOE+ 2025

The concept of “baseload” is outdated. Modern grids use a flexible mix of solar, wind, battery storage, demand response, and interconnectors. Renewables paired with storage can provide 24/7 reliable power. Nuclear is actually poorly suited for flexible grids — reactors are slow to ramp up and down and are most economical only when running continuously, making them incompatible with variable renewable generation. Countries like Denmark, Portugal, and Uruguay already achieve 80–100% renewable electricity on many days.

Sources: IEA, IRENA, European Transmission System Operators grid data

Renewables create nearly twice as many jobs: 15 jobs per $1 million invested compared to 8 for nuclear. Solar PV alone added over 500,000 jobs in 2023. The US nuclear sector employs a total of 68,008 workers. Investing in renewables delivers both faster decarbonization and greater economic benefit for communities.

Sources: Springer (2023), IEA World Energy Employment 2024