INES-event
INES 0

TURBINE TRIP AND REACTOR POWER DECREASE DUE TO FAILURE OF AUXILIARY TRANSFORMER AT NPP DUKOVANY

At 7:14 a.m. with unit 3 at full power a failure at the auxiliary transformer occurred.
This failure caused a fire in the auxiliary transformer (BT 02) and subsequently a rector trip.
Reactor power was decreased automatically to 30% of full power. The operator decreased the reactor power manually to minimal power control level at 8.10 a.m.
The reactor is now under control on minimal power control level.
The fire was extinguished at 8.50 a.m.
This event is preliminarily rated at INES level 0.

Location: DUKOVANY-3
Event date: Thu, 03-02-1994
Nuclear event report
Legenda & explanation