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On Wednesday, August 28, 2019, at 1316 CDT … On Wednesday, August 28, 2019, at 1316 CDT, Grand Gulf Nuclear Station experienced a power loss to the Control Room High Pressure Core Spray (HPCS) Instrumentation Panel due to an internal inverter failure. The power loss caused the loss of the HPCS System (a single train system). The minimum flow valve (a Primary Containment Isolation Valve) for HPCS opened due to this power loss as well. This valve was manually closed in response to this, and the outboard isolation requirement for the associated penetration (which) is closed (for the) system remained intact throughout this event.</br>No other accident mitigation systems were affected by this event.</br>The cause of this event is under investigation at this time. </br>The NRC Resident Inspectors were notified. </br>This Condition is an 8-hour reportable condition as an event or condition that could have prevented the fulfillment of a safety function, in accordance with 10 CFR 50.72(b)(3)(v)(D). accordance with 10 CFR 50.72(b)(3)(v)(D). +
18:16:00, 28 August 2019 +
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19:10:00, 28 August 2019 +
18:16:00, 28 August 2019 +
On Wednesday, August 28, 2019, at 1316 CDT … On Wednesday, August 28, 2019, at 1316 CDT, Grand Gulf Nuclear Station experienced a power loss to the Control Room High Pressure Core Spray (HPCS) Instrumentation Panel due to an internal inverter failure. The power loss caused the loss of the HPCS System (a single train system). The minimum flow valve (a Primary Containment Isolation Valve) for HPCS opened due to this power loss as well. This valve was manually closed in response to this, and the outboard isolation requirement for the associated penetration (which) is closed (for the) system remained intact throughout this event.</br>No other accident mitigation systems were affected by this event.</br>The cause of this event is under investigation at this time. </br>The NRC Resident Inspectors were notified. </br>This Condition is an 8-hour reportable condition as an event or condition that could have prevented the fulfillment of a safety function, in accordance with 10 CFR 50.72(b)(3)(v)(D). accordance with 10 CFR 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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18:16:00, 28 August 2019 +
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