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Emergency Service Water "A" (ESW ) Pump fa … 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.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
19:00:00, 24 May 2004 +
17:12:00, 24 May 2004 +
19:00:00, 24 May 2004 +
Emergency Service Water "A" (ESW ) Pump fa … 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.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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00:00:00, 24 May 2004 +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
02:23:28, 2 March 2018 +
17:12:00, 24 May 2004 +
false +
false +
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19:00:00, 24 May 2004 +
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