Sellafield nuclear plant in Cumbria has been closed due to "adverse weather conditions".
A statement on Sellafield Ltd's website reads: "The site emergency control centre has been established and is managing the incident in line with well rehearsed procedures. We have implemented a phased, early release of staff from the site; this is being carried out in a safe, controlled manner.
"There is no reason to believe that there will be any off-site nuclear, environmental or conventional safety issues associated with the incident. The priority for the team is to protect our workforce, the community and the environment."