Scottish nuclear plant emptied of fuel as UK winds down ageing gas-cooled reactors.

the cost of decommissioning should be taken into
account when the government decided on new nuclear plants as “no scheme can be guaranteed to meet a cost more than a century into the future”.

The first of the UK’s seven advanced gas-cooled reactor nuclear power
stations has been emptied of fuel, kick-starting a decommissioning process
that will cost at least £27bn in total and take almost a century.

EDF said on Thursday it had defuelled Hunterston B, on the west coast of Scotland,
paving the way for the transfer of the site and 250 staff from the French
power company to the UK Nuclear Decommissioning Authority next April. The
site provided most of Scotland’s energy for more than 40 years from its
launch in 1976 until its final closure in 2022.

EDF owns seven advanced gas-cooled reactors (AGRs) plants in the UK, which were built between the 1960s and 1980s and differ from newer nuclear plants that use water for
cooling. Just four are still operating.

The uranium fuel has been packaged
into 350 large flasks, which will be stored by the NDA at the Sellafield
nuclear site in Cumbria for at least 50 years until a longer-term
underground facility has been built.

Although the process took just three
years and £400mn, it will take almost a century to eradicate the radiation
from the land and buildings, EDF has said. The decommissioning of the seven
AGRs is separate to a much wider £105bn decommissioning programme, which
will cover an additional 17 closed nuclear sites over the next 120 years,
according to the NDA.

The closures will leave the UK with just one nuclear
power plant still running by 2030 — Sizewell B in Suffolk, which is also
managed by EDF and uses a pressurised water reactor. The NDA said it was
“acutely aware of the costs associated with delivering our mission”.

The cost of decommissioning nuclear power plants is under scrutiny as the
UK presses ahead with new nuclear projects, including the £40bn Sizewell
C, which is expected to get government go-ahead this spring, and the £46bn
Hinkley Point C, which is still under construction and will open by 2030 at
the earliest.

Steve Thomas, emeritus professor of energy policy at
Greenwich university, said the cost of decommissioning should be taken into
account when the government decided on new nuclear plants as “no scheme
can be guaranteed to meet a cost more than a century into the future”.

Although EDF has owned Hunterston B and the seven other AGR nuclear plants
since 2009, the cost of decommissioning is being paid for through the
ringfenced Nuclear Liabilities Fund (NLF), which was set up in 1996 after
privatisation and is valued at £20.6bn. Decommissioning costs have soared
over the past three decades, with the fund requiring cash injections from
the Treasury, including £5bn in July 2020 and a further £5.6bn in March
2022, according to the NLF.

FT 24th April 2025, https://www.ft.com/content/c31af2d6-eeaa-4a3d-a2c0-81c63b29cb1d