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identified that could challenge the abilit … identified that could challenge the ability to maintain the primary (reactor) coolant makeup function, as required by Appendix R, paragraph III.G, "Fire Protection of Safe Shutdown Capability.</br></br>In the analysis, the specific fire scenario is assumed to render all charging pumps unavailable for maintaining the primary coolant makeup function. To compensate for the loss of all charging pumps, the analysis credited high pressure safety injection pump (HPSI) P-66B for supplying makeup. However, the review determined that the fire scenario could also result in damage to the control circuit for the HPSI pump's credited suction valve, CV-3031, resulting in a spurious closure of the valve. The spurious closure of the HPSI pump's suction valve with the HPSI pump in operation would likely render the HPSI pump inoperable, causing a loss of the ability to maintain the primary coolant makeup function.</br></br>This event is reportable in accordance with 10 CFR 50.73(a)(2)(ii)(B) as an unanalyzed condition.3(a)(2)(ii)(B) as an unanalyzed condition. +
February 14, 2006 +
identified that could challenge the abilit … identified that could challenge the ability to maintain the primary (reactor) coolant makeup function, as required by Appendix R, paragraph III.G, "Fire Protection of Safe Shutdown Capability.</br></br>In the analysis, the specific fire scenario is assumed to render all charging pumps unavailable for maintaining the primary coolant makeup function. To compensate for the loss of all charging pumps, the analysis credited high pressure safety injection pump (HPSI) P-66B for supplying makeup. However, the review determined that the fire scenario could also result in damage to the control circuit for the HPSI pump's credited suction valve, CV-3031, resulting in a spurious closure of the valve. The spurious closure of the HPSI pump's suction valve with the HPSI pump in operation would likely render the HPSI pump inoperable, causing a loss of the ability to maintain the primary coolant makeup function.</br></br>This event is reportable in accordance with 10 CFR 50.73(a)(2)(ii)(B) as an unanalyzed condition.3(a)(2)(ii)(B) as an unanalyzed condition. +
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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>.
15:11:38, 27 November 2017 +
April 14, 2006 +
February 14, 2006 +
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