https://www.theguardian.com/business/2023/dec/04/sellafield-nuclear-site-hacked-groups-russia-china
It is still not known if the malware has been eradicated. It may mean some of Sellafield’s most sensitive activities, such as moving radioactive waste, monitoring for leaks of dangerous material and checking for fires, have been compromised.
Sources suggest it is likely foreign hackers have accessed the highest echelons of confidential material at the site, which sprawls across 6 sq km (2 sq miles) on the Cumbrian coast and is one of the most hazardous in the world.
Sellafield covers 6 sq km on the Cumbrian coast and is one of the most hazardous nuclear sites in the world. Photograph: David Levene/The Guardian
The full extent of any data loss and any ongoing risks to systems was made harder to quantify by Sellafield’s failure to alert nuclear regulators for several years, sources said.