INES-event
INES 2

LOSS OF ELECTRICAL OFF-SITE POWER AFFECTED THE FOUR UNITS LOAD REJECTION AND DIESEL GENERATOR FAILED

A short circuit occurred in an external 400 kV switching station. It resulted in a disconnection of both 400 kV and 110 kV lines to all four units: Unit 1 failed to cope with the load rejection, it resulted in a reactor scram. Unit 2 and 4 reduced their power to the level of self-consumption. Unit 3 that had been shut down for refuelling, lost power supply and one of its two operable DGs failed to start automatically.
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Location: DUKOVANY-1
Event date: Tue, 04-12-1990
Nuclear event report
Legenda & explanation