Explosion at North Carlolina Nuclear Plant, Emergency Declared after Reactor Power Loss

Facility: BRUNSWICK [Nuclear Plant in N.C.]… Emergency Class: ALERT… EMERGENCY DECLARED… RPS [Reactor Protection System] ACTUATION – CRITICAL… MANUAL SCRAM AND ALERT DECLARATION DUE TO ELECTRICAL FAULT RESULTING IN FIRE/EXPLOSION… Unit 1 declared an Alert… due to an explosion/fire in the Balance of Plant 4 kV switchgear bus area. Prior to the Alert declaration, the operators initiated a manual SCRAM due to an unexpected power decrease from 88% to 40%. The licensee has visually verified that there is no ongoing fire and is investigating the initial cause of the event… [T]he licensee reported the following… “a manual reactor scram was initiated due to loss of both recirculation system variable speed drives as a result of an electrical fault.

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