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Revealed: Sellafield nuclear site has leak that could pose risk to public

Safety concerns at Europe’s most hazardous plant have caused diplomatic tensions with US, Norway and Ireland

Anna Isaac and Alex Lawson, Guardian, 5 Dec 23

Sellafield, Europe’s most hazardous nuclear site, has a worsening leak from a huge silo of radioactive waste that could pose a risk to the public, the Guardian can reveal.

Concerns over safety at the crumbling building, as well as cracks in a reservoir of toxic sludge known as B30, have caused diplomatic tensions with countries including the US, Norway and Ireland, which fear Sellafield has failed to get a grip of the problems.

The leak of radioactive liquid from one of the “highest nuclear hazards in the UK” – a decaying building at the vast Cumbrian site known as the Magnox swarf storage Silo (MSSS) – is likely to continue to 2050. That could have “potentially significant consequences” if it gathers pace, risking contaminating groundwater, according to an official document.

Cracks have also developed in the concrete and asphalt skin covering the huge pond containing decades of nuclear sludge, part of a catalogue of safety problems at the site.

These concerns have emerged in Nuclear Leaks, a year-long Guardian investigation into problems spanning cyber hacking, radioactive contamination and toxic workplace culture at the vast nuclear dump.

Sellafield, a sprawling 6 sq km (2 sq mile) site on the Cumbrian coast employing 11,000 people, stores and treats nuclear waste from weapons programmes and nuclear power generation, and is the largest such facility in Europe.

A document sent to members of the Sellafield board in November 2022 and seen by the Guardian raised widespread concerns about a degradation of safety across the site, warning of the “cumulative risk” from failings ranging from nuclear safety to asbestos and fire standards.

A scientist on an expert panel that advises the UK government on the health impact of radiation told the Guardian that the risks posed by the leak and other chemical leaks at Sellafield have been “shoved firmly under the rug”.

A fire in 1957 at Windscale, as the site was formerly known, was the UK’s worst nuclear accident to date. An EU report in 2001 warned an accident at Sellafield could be worse than Chornobyl, the site of the 1986 disaster in Ukraine that exposed five million Europeans to radiation. Sellafield contains significantly more radioactive material than Chornobyl.

The report said events that could trigger an atmospheric release of radioactive waste at the plant included explosions and air crashes.

Such is the concern about its safety standards that US officials have warned of its creaking infrastructure in diplomatic cables seen by the Guardian. Among their concerns are leaks from cracks in concrete at toxic ponds and a lack of transparency from the UK authorities about issues at the site. The UK and the US have a decades-long relationship on nuclear technology.

Concerns about how Sellafield is run have also led to tensions with the Irish and Norwegian governments.

Norwegian officials are concerned that an accident at the site could lead to a plume of radioactive particles being carried by prevailing south-westerly winds across the North Sea, with potentially devastating consequences for Norway’s food production and wildlife. A senior Norwegian diplomat told the Guardian that they believed Oslo should offer to help fund the site so that it can be run more safely, rather than “run something so dangerous on a shoestring budget and without transparency”………………………………………………………………………………………………………………….more https://www.theguardian.com/business/2023/dec/05/sellafield-nuclear-site-leak-could-pose-risk-to-public

December 7, 2023 - Posted by Christina Macpherson | UK, wastes