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On November 30, 2011, at 1747 hours (EST), … On November 30, 2011, at 1747 hours (EST), with the reactor at 100% core thermal power and steady state conditions, Pilgrim Nuclear Power Station (PNPS) declared the High Pressure Coolant Injection (HPCI) system inoperable due to the HPCI turbine control valve (HPCI-24) failing to go open during planned post-maintenance testing. The HPCI-24 is a hydraulically operated control valve and its normal position is closed. The HPCI-24 valve has a safety function to open on a demand signal during certain event mitigation scenarios requiring the HPCI system operation. </br>Based on the turbine control valve failing to open during post-maintenance testing and a subsequent check out run per PNPS Procedure 8.5.4.1, the HPCI system was declared inoperable at 1747 hours and the appropriate LCO was entered. An investigation of the event is underway and continuing.</br>This event had no impact on the health and/or safety of the public.</br>The NRC Resident Inspector bas been notified. </br>This is an 8-hour notification made in accordance with 50.72(b)(3)(v)(D).made in accordance with 50.72(b)(3)(v)(D). +
22:47:00, 30 November 2011 +
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22:09:00, 30 November 2011 +
22:47:00, 30 November 2011 +
On November 30, 2011, at 1747 hours (EST), … On November 30, 2011, at 1747 hours (EST), with the reactor at 100% core thermal power and steady state conditions, Pilgrim Nuclear Power Station (PNPS) declared the High Pressure Coolant Injection (HPCI) system inoperable due to the HPCI turbine control valve (HPCI-24) failing to go open during planned post-maintenance testing. The HPCI-24 is a hydraulically operated control valve and its normal position is closed. The HPCI-24 valve has a safety function to open on a demand signal during certain event mitigation scenarios requiring the HPCI system operation. </br>Based on the turbine control valve failing to open during post-maintenance testing and a subsequent check out run per PNPS Procedure 8.5.4.1, the HPCI system was declared inoperable at 1747 hours and the appropriate LCO was entered. An investigation of the event is underway and continuing.</br>This event had no impact on the health and/or safety of the public.</br>The NRC Resident Inspector bas been notified. </br>This is an 8-hour notification made in accordance with 50.72(b)(3)(v)(D).made in accordance with 50.72(b)(3)(v)(D). +
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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>.
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22:47:00, 30 November 2011 +
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