A GAS leak triggered an alarm at Heysham nuclear power station early today.
The CO2 warning, which went off at around 6.45am, was confined to Heysham 1 station.
A spokesman for EDF Energy, which runs the station, said: "At approximately 6.45am this morning, a CO2 alarm sounded in the basement of reactor 2 at Heysham 1 power station following a very small leak of the gas from a valve which has since been isolated.
"As part of the station's standard practice the small number of staff on site at that time were mustered to ensure everyone was safe and accounted for, which they were."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here