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At 1231 hours on October 7, 2003, the High … At 1231 hours on October 7, 2003, the High Pressure Core Spray (HPCS) system at Columbia Generating Station was declared inoperable due to a failure to maintain system pressure while the system was being operated with the keep-fill piping isolated for maintenance on the system waterleg pump. This action rendered the HPCS system unable to perform its safety function to mitigate the consequences of an accident. Upon discovery of the inoperable condition, the Reactor Core Isolation Cooling system was verified to be operable and HPCS was restored to operable status at 1538 in accordance with the Required Action of plant Technical Specifications Limiting Condition for Operability 3.5.1, Conditions B.1 and B.2. All other Emergency Core Cooling System (ECCS) were operable during the time the HPCS system was inoperable. This event is being reported pursuant to the guidance for reporting under 50.72(b)(3)(v)(D) contained in NUREG 1022, which states for single train systems that perform a safety function, loss of a single train would prevent the fulfillment of the safety function and therefore is reportable.</br>The NRC Resident Inspector will be notified of this event by the licensee.be notified of this event by the licensee. +
19:31:00, 7 October 2003 +
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19:54:00, 7 October 2003 +
19:31:00, 7 October 2003 +
At 1231 hours on October 7, 2003, the High … At 1231 hours on October 7, 2003, the High Pressure Core Spray (HPCS) system at Columbia Generating Station was declared inoperable due to a failure to maintain system pressure while the system was being operated with the keep-fill piping isolated for maintenance on the system waterleg pump. This action rendered the HPCS system unable to perform its safety function to mitigate the consequences of an accident. Upon discovery of the inoperable condition, the Reactor Core Isolation Cooling system was verified to be operable and HPCS was restored to operable status at 1538 in accordance with the Required Action of plant Technical Specifications Limiting Condition for Operability 3.5.1, Conditions B.1 and B.2. All other Emergency Core Cooling System (ECCS) were operable during the time the HPCS system was inoperable. This event is being reported pursuant to the guidance for reporting under 50.72(b)(3)(v)(D) contained in NUREG 1022, which states for single train systems that perform a safety function, loss of a single train would prevent the fulfillment of the safety function and therefore is reportable.</br>The NRC Resident Inspector will be notified of this event by the licensee.be notified of this event by the licensee. +
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100 +
00:00:00, 7 October 2003 +
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>.
22:44:36, 24 September 2017 +
19:54:00, 7 October 2003 +
true +
false +
0.0158 d (0.38 hours, 0.00226 weeks, 5.20524e-4 months) +
19:31:00, 7 October 2003 +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.