§ Mr. D. E. Thomasasked the Secretary of State for Energy whether the Central Electricity Generating Board informed his Department of a nuclear incident at Trawsfynydd power station during the last 10 days; if he will undertake a full departmental inquiry into all circumstances surrounding this incident; and if he will make a statement.
§ Mr. Norman LamontI am informed that moisture was discovered in the coolant circuit of reactor 1 of the Trawsfynydd nuclear power station on 25 June, when the reactor was being brought back to power after a grid disturbance had306W caused an automatic shutdown the previous day. The reactor was again shut down, and the moisture traced to a leaking boiler tube. The boiler affected has been isolated, and the moisture is being removed from the coolant circuit by circulating dry gas.
I understand that the Nuclear installations Inspectorate considers that there is no hazard to safety or health from the leak or the remedial action, and that there has been no incident of a nature which is required to be reported under the arrangements relating to nuclear installations.