ENS 46782

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v t e ENS Event
13:50 Apr 25, 2011
Title	Single Train Charging Pump Declared Inoperable
Event Description	During normal operation with 23 Charging pump in service, an unusual sound was noticed by Operations. All other parameters were normal for the pump, but 21 Charging pump was placed in service as a precaution. Subsequent investigation was unable to conclusively identify the source of the unusual sound and a lower-than-expected crankcase oil pressure was observed on a maintenance run. Therefore, 23 Charging Pump was declared inoperable. This is the alternate safe shutdown pump responsible for inventory control for remote shutdown. NRC guidance indicates that a loss of a single train system not credited in accident analysis is reportable when identified in LCD 3.3.4 'Remote Shutdown.' The licensee notified the NRC Resident Inspector and the New York Public Service Commission. * * UPDATE AT 1408 EDT ON 04/29/11 FROM MIKE BURNEY TO S. SANDIN * * * The licensee is retracting this report based on the following: Indian Point Unit 2 is retracting the 8-hour non-emergency notification made on April 25, 2011, at 1606 EDT (EN #46782). The notification on April 25, 2011, reported a loss of a single train system identified in LCO 3.3.4 'Remote Shutdown' (SSFF [safety system functional failure]) as a result of declaring the 23 Charging Pump (CP) inoperable. The 23 CP exhibited unusual sound during operation. Because the 23 CP is credited in Technical Specification (TS) 3.3.4 for Remote Shutdown, the inoperable condition was determined to be a loss of safety function. The TS 3.3.4 Allowed Outage Time (AOT) for inoperable conditions is 30 days. In accordance with recent NRC guidance provided to Indian Point for loss of single train systems, although not credited in the accident analysis and specified in Technical Specification 3.3.4, this condition is reportable as a SSFF. Subsequent investigations determined that the documented condition does not pose a challenge to the operability of the 23 CP. The noise was associated with the normal operation of the charging pump internal check valves. This condition is a long term issue that does not affect the current operation of the pump. The pump was in operation with no abnormal parameters noted at the time the noise was noted. No SSFF occurred. The licensee will inform the NRC Resident Inspector. Notified R1DO (Schmidt).

ENS 46782 +/-
Where
Indian Point New York (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release
Time - Person (Reporting Time:+2.27 h0.0946 days <br />0.0135 weeks <br />0.00311 months <br />)
Opened:	Luke Hedges 16:06 Apr 25, 2011
NRC Officer:	Mark Abramovitz
Last Updated:	Apr 29, 2011
46782 - NRC Website
v • d • e

v t e Emergency Notification System
Indian Point with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor
WEEKMONTHYEAR2023-11-29T20:00:00 [Table view]
[ENS list for Indian Point]

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