ENS 40774

v t e ENS Event
19:00 May 24, 2004
Title	Degraded Condition Due to Emergency Service Water Failure
Event Description	Emergency Service Water "A" (ESW ) Pump failure resulted in inoperability of all Div 1 ECCS systems at 0150 on 05/21/04 [See event notification 40767]. A plant shutdown was initiated with mode 4 [cold shutdown] achieved at 0619 on 05/23/04. During the disassembly and inspection of ESW A pump, a failed coupling on the pump shaft was found to be the cause of the failure. An Operability Determination [OD] was requested on ESW B at 1330 on 05/24/04 since both pumps had the identical coupling design and the pumps had similar run times. At 1500, the Design Engineering Manager informed the control room that engineering could not return a completed OD within the allotted time that could justify continued ESW B operability. The control room Shift Manager than declared the ESW B pump inoperable. This results in a condition that could have prevented the fulfillment of a safety function, specifically the removal of residual heat. The licensee notified the NRC Resident Inspector.

ENS 40774 +/-
Where
Perry Ohio (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
Time - Person (Reporting Time:+-1.8 h-0.075 days <br />-0.0107 weeks <br />-0.00247 months <br />)
Opened:	Jim Case 17:12 May 24, 2004
NRC Officer:	Bill Gott
Last Updated:	May 24, 2004
40774 - NRC Website Loading map...
v • d • e

v t e Emergency Notification System
Perry with 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded
WEEKMONTHYEAR2017-10-04T06:50:00 [Table view]
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