INES-event
INES 1

PROTECTION SYSTEM FOR INITIATING BLOW DOWN NOT COMPLETELY REESTABLISHED AFTER REFUELLING OUTAGE

Against instructions a connecting wire was not inserted to its place and thereby the corresponding relay's function was inhibited. The blowdown system would have not worked automatically if called upon.
Justifaction of level 1: Table 1, degradation of defence-in-depth without an initiator. Safety function availability. Within opertional limits and conditions. Additional factor: Safety culture deficiencies (in the quality assurance process).

Location: BARSEBECK-1
Event date: Wed, 28-09-1994
Nuclear event report
Legenda & explanation