ENS 48215

v t e ENS Event
04:38 Aug 21, 2012
Title	Both Emergency Diesel Generators Inoperable
Event Description	At 0038 EDT on 08/21/12, EDG "A" was declared inoperable after the Engineered Safeguards Actuation System (ESFAS) fuse failed . EDG "B" had been inoperable for planned maintenance since 2223 EDT on 08/15/12. With both EDGs inoperable, Unit 2 entered Tech Spec LCO 3.8.1.2 which requires suspension of all operations involving core alteration and positive reactivity additions. At 0713 EDT on 08/21/12, the licensee declared EDG "B" Operable exiting the Tech Spec LCO. The cause of the ESFAS fuse failure on EDG "A" is under investigation. The licensee will notify state and local agencies and has informed the NRC Resident Inspector. * * RETRACTION FROM WAYNE WOOLERY TO DONG PARK AT 1027 EDT ON 9/4/12 * * * The purpose of this call is to retract the report made on 8/21/2012, Event Number 48215. Upon further review, the fuse failure did not render the 'A' Emergency Diesel Generator (EDG) inoperable in MODE 5. If called upon, the safety functions would have been met. The Engineered Safeguards Actuation System (ESFAS) was repaired prior to restart of the unit. Notified R1DO (Conte).

ENS 48215 +/- *RETRACTED*
Where
Millstone Connecticut (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+3.2 h0.133 days <br />0.019 weeks <br />0.00438 months <br />)
Opened:	Kenneth Hajnal 07:50 Aug 21, 2012
NRC Officer:	Steve Sandin
Last Updated:	Sep 4, 2012
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v • d • e

v t e Emergency Notification System
Millstone with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR		2024-08-21T16:00:00 [Table view]
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