INES-event
INES 0

REACTOR SHUTDOWN DUE TO EXCESS HYDROGEN CONCENTRATION IN THE GENERATOR STATOR GAS TRAP

The unit was shut down by protecitn on hydrogen content in the generator stator gas trap in excess of permissible values.
BASIS FOR RATING: Initiator - hydrogen leakage.
Criterion - degradation of defence-in-depth.
Initial event - expected, real. Safety function availability: full, which corresponds to level 0/1 (A-1R).
DIFFICULTIES IN RATING:

Location: ZAPOROZHE-4
Event date: Wed, 13-02-1991
Nuclear event report
Legenda & explanation