ENS 48376

v t e ENS Event
13:59 Oct 4, 2012
Title	Both Trains of Control Room Emergency Ventilation System Out of Service
Event Description	The 'A' Main Control Room Emergency Ventilation System (MCREV) fan failed to automatically start when placed in service at 0959 EDT on 10/4/12. The `B' fan was available at the time of the initiation, but was inoperable due to E-42 Emergency 4kV Bus outage. Both MCREV fans inoperable is an entry into Technical Specification 3.7.4 Condition E which requires Unit 3 to be Mode 3 in 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. Unit 2 was not in a mode of applicability at the time of the event [Unit 2 is defueled]. This issue is being reported under 10 CFR 50.72(b)(3)(v)(D) for an event that could have prevented the fulfillment of a safety function - mitigate the consequences of an accident. The 'A' MCREV fan was restored to an operable status at 1237 EDT on 10/4/12 and the Technical Specification Action was exited. The NRC Resident Inspector has been notified.

ENS 48376 +/-
Where
Peach Bottom Pennsylvania (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
LER:	05000278/LER-2012-003
Time - Person (Reporting Time:+2.63 h0.11 days <br />0.0157 weeks <br />0.0036 months <br />)
Opened:	Larry Sloan 16:37 Oct 4, 2012
NRC Officer:	Bill Huffman
Last Updated:	Oct 4, 2012
48376 - NRC Website
v • d • e

v t e Emergency Notification System
Peach Bottom with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2021-04-30T03:54:00 [Table view]
[ENS list for Peach Bottom]

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