INES-event
INES 0

REACTOR TRIP DUE TO GROUND OF MAIN GENERATOR PROTECTION RELAY

The plant was under full power operation. At 01:25 the phase B cable of current convertor for main generator differential protection relay was grounded due to wearing away of coating. The coating was rubbed off due to the vibration of cabinet. Turbine trip caused by the ground and reactor trip followed consequently.

Justification: Full safety function availability: the event is rated at level 0 as per user's manual Part III, Table II, A1.

Location: KORI 1
Event date: Wed, 29-06-1994
Nuclear event report
Legenda & explanation