Hinkley Point C costs hit a new high but nuclear plant still isn’t roasting Christmas turkeys

By Linda Pentz Gunter

The Great Mosque of Mecca is considered the most expensive building in the world at $115.2 billion. Right behind it comes….a nuclear power plant! The two-reactor 3,260MW Hinkley Point C nuclear site still under construction in the UK will now cost at least £46 billion ($59 billion) according to the latest figures released by its developer, the French energy giant, EDF. 

As such, Hinkley Point C has now earned the dubious honor of becoming the second most expensive building in the world. And it’s not even finished. The price could soar still higher.

EDF originally bragged that Britons would be baking their Christmas turkeys powered by Hinkley Point C by 2017. The completion date has now been pushed to “after 2029”.  

The nuclear power industry is very good at tripling things. Perhaps not global nuclear installations by 2050 as it bragged would happen during an announcement at the COP28 climate summit last December. But the price tag for a new reactor? Timelines for new reactor construction? Straight A grades all around!

That’s almost what’s happening at Hinkley Point C where the new price is more than double the original estimated cost of £18 billion ($23 billion). Getting to triple the cost still seems eminently achievable given the new completion date.

This not-so-shocking news, given nuclear power’s track record, comes after the recent, overblown announcement by Rishi Sunak’s Conservative government that Britain would launch its “biggest expansion of nuclear power for 70 years to create jobs, reduce bills and strengthen Britain’s energy security.”  The plan will of course achieve none of these things.

Far from reducing electricity bills for British consumers, the Hinkley nuclear project will in fact increase them “far above the market electricity price,” predicted Dr Norbert Allnoch, CEO of the International Economic Forum for Renewable Energies (IWR), based in Münster, Germany.

According to estimates by IWR, the cost of the electricity generated by Hinkley Point C will be “significantly higher than the 15 cents/kWh mark” and will continue to rise. This is because the UK government agreed a “state-guaranteed price for nuclear power being paid to EDF, which is linked to the inflation rate,” says IWR.

All of this came after the recent announcement that UK authorities had granted a Development Consent Order (DCO) to EDF’s identical twin EPR reactor project on the Suffolk Coast at Sizewell, while committing £1.3 billion ($1.6 billion) in funding for the project. The French company has already been tearing up pristine countryside there, destroying habitat and disturbing wildlife at the adjacent Minsmere Nature Reserve. 

Meanwhile, France is pushing the UK to pay for the cost-overruns at Hinkley and the expected ballooning bills at Sizewell once work begins. France reportedly blames Britain for prompting the Chinese firm CGN to withdraw its 33.5% share from the Hinkley plant after Britain booted China out of the Sizewell C nuclear project.

Chinese investment in UK nuclear projects has been a hot political potato for some time, and came to be viewed as “an unacceptable national security risk.” A proposed new reactor project at Bradwell in Essex, a joint project between China and France, looks unlikely to go forward, at least in part due to security concerns about Chinese involvement. 

These challenges prompted the UK government to seek  alternative sources of funding, inevitably settling on ratepayers using something called a Regulated Asset Base (RAB). RAB effectively funds future nuclear projects by charging ratepayers up front in their electricity bills for the anticipated costs of nuclear plant design, construction, commissioning, and operation. 

“Hinkley Point C has been a shambolic money pit,” said a spokesperson from Together Against Sizewell C on X (formerly Twitter). “It’s been hit by delay after delay and the costs are escalating at an alarming rate. Nobody can say with any confidence when it will go live or how much money will have been wasted on it.”

The story of Hinkley C illustrates that the nuclear sector is “out of control economically,” said Paul Gunter, director of the Reactor Oversight Project at Beyond Nuclear. The cost of EDF’s EPR reactor being built in France at Flamanville and still incomplete, has more than quadrupled to close to $15 billion. Another EPR, at Olkiluoto in Finland, went from $3.2 billion to more than $12 billion and launched 12 years late.

On U.S. soil, two AP1000 reactors at the Vogtle nuclear power plant site in Georgia, will likely come in at a total price tag of at least $35 billion, $20 billion more than originally estimated, with the second of the two reactors still not on line.

Linda Pentz Gunter is the international specialist at Beyond Nuclear and writes for and curates Beyond Nuclear International.

Headline photo of Hinkley Point C blockade by CND/Creative Commons.