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This 60-day report, as allowed by 10 CFR 5 … This 60-day report, as allowed by 10 CFR 50.73(a)(1), is being made under the reporting requirement in 10CFR50.73(a)(2)(iv)(A) to describe an unplanned, invalid actuation of specified systems, specifically the Unit 3 Primary Containment Isolation System (PCIS). On 3/2/09, at approximately 1155 hours, Unit 3 experienced an invalid PCIS partial isolation. Associated with the momentary shorting of a terminal lead during maintenance, a fuse was blown and power was lost to nine Primary Containment Isolation Valves (PCIVs). This resulted in two of the PCIVs re-positioning to the closed position. The re-positioned PCIVs were the AO-3-07B-3509 (Inner Drywell Exhaust Valve) and the AO-3-16-5235 (Instrument Nitrogen System Suction Valve). Closure of these valves affected the Containment Atmospheric Control (CAC), Containment Atmospheric Dilution (CAD) and Containment Instrument Nitrogen systems. Closure of these valves was the expected response for loss of power to this portion of the PCIS control circuitry. The fuse was replaced and the valves were restored to an operable condition by 1235 hours on 3/2/09. </br>The invalid PCIS isolation was a result of the momentary shorting of an energized terminal lead associated with preventive maintenance to replace a pressure switch associated with PCIV AO-3-07B-3519 (Nitrogen Supply Purge Valve). </br>This issue has been entered into the site Corrective Action Program (CR 887441) for evaluation and implementation of further corrective actions. The NRC resident has been informed of this notification.nt has been informed of this notification. +
15:55:00, 2 March 2009 +
44,940 +
08:40:00, 27 March 2009 +
15:55:00, 2 March 2009 +
This 60-day report, as allowed by 10 CFR 5 … This 60-day report, as allowed by 10 CFR 50.73(a)(1), is being made under the reporting requirement in 10CFR50.73(a)(2)(iv)(A) to describe an unplanned, invalid actuation of specified systems, specifically the Unit 3 Primary Containment Isolation System (PCIS). On 3/2/09, at approximately 1155 hours, Unit 3 experienced an invalid PCIS partial isolation. Associated with the momentary shorting of a terminal lead during maintenance, a fuse was blown and power was lost to nine Primary Containment Isolation Valves (PCIVs). This resulted in two of the PCIVs re-positioning to the closed position. The re-positioned PCIVs were the AO-3-07B-3509 (Inner Drywell Exhaust Valve) and the AO-3-16-5235 (Instrument Nitrogen System Suction Valve). Closure of these valves affected the Containment Atmospheric Control (CAC), Containment Atmospheric Dilution (CAD) and Containment Instrument Nitrogen systems. Closure of these valves was the expected response for loss of power to this portion of the PCIS control circuitry. The fuse was replaced and the valves were restored to an operable condition by 1235 hours on 3/2/09. </br>The invalid PCIS isolation was a result of the momentary shorting of an energized terminal lead associated with preventive maintenance to replace a pressure switch associated with PCIV AO-3-07B-3519 (Nitrogen Supply Purge Valve). </br>This issue has been entered into the site Corrective Action Program (CR 887441) for evaluation and implementation of further corrective actions. The NRC resident has been informed of this notification.nt has been informed of this notification. +
Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
100 +
00:00:00, 27 March 2009 +
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>.
02:12:26, 2 March 2018 +
08:40:00, 27 March 2009 +
true +
false +
24.74 d (593.75 hours, 3.534 weeks, 0.813 months) +
15:55:00, 2 March 2009 +
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.