INES-event
INES 1

Automatic protection system disconnected during non nuclear heat up after refuelling

After refueling in cold shutdown all safety systems were tested and normally connected. Afterwards the automatic activation of safety functions was disconnected which was not noted due to human error. Some sixteen hours after start of the non nuclear heat up, when the temperature and the pressure in the reactor were still far below operational values, the failure was discovered and correct at once.

Location: RINGHALS-2
Event date: Sun, 17-08-1997
Nuclear event report
Legenda & explanation