An overheated circuit was believed to have been the cause of an overnight blaze at a nuclear plant at Capenhurst.
Fire crews from Chester, Ellesmere Port, Northwich and North Wales were called to the fire blaze at Urenco on Capenhurst Lane at around 4.13am on Thursday morning.
On arrival they discovered the flames were confined to an industrial sized electrical unit and wore breathing apparatus and used foam and dry powder to extinguish the blaze.
Crews monitored the electrical cabinet using a thermal imaging camera and the area was ventilated.
