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This event is being reported pursuant to t … This event is being reported pursuant to the requirements of 10 CFR 50.72(b)(3)(v) as an event or condition that at the time of discovery could have prevented the fulfillment of the safety function of systems supplied by the station safety-grade pneumatic supply. The systems affected include the primary containment isolation valves (i.e., large primary containment isolation valve boot seals) and the reactor-building to suppression pool vacuum breakers. </br>On 8/24/09 at 1330, while troubleshooting the receipt of unexpected alarms during containment valve stroking the previous week, Exelon personnel discovered a valve closed instead of the expected open position. Licensed personnel concluded at 1415 that the out of position valve was restricting the Containment Atmospheric Dilution tank from supplying operating nitrogen to the Safety Grade Instrument Gas (SGIG) system headers for Peach Bottom Units 2 and 3. The valve was re-opened at 1445 (within the one hour action time required by Technical Specifications) and other system valves were verified to be in the required positions.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
18:15:00, 24 August 2009 +
45,289 +
21:21:00, 24 August 2009 +
18:15:00, 24 August 2009 +
This event is being reported pursuant to t … This event is being reported pursuant to the requirements of 10 CFR 50.72(b)(3)(v) as an event or condition that at the time of discovery could have prevented the fulfillment of the safety function of systems supplied by the station safety-grade pneumatic supply. The systems affected include the primary containment isolation valves (i.e., large primary containment isolation valve boot seals) and the reactor-building to suppression pool vacuum breakers. </br>On 8/24/09 at 1330, while troubleshooting the receipt of unexpected alarms during containment valve stroking the previous week, Exelon personnel discovered a valve closed instead of the expected open position. Licensed personnel concluded at 1415 that the out of position valve was restricting the Containment Atmospheric Dilution tank from supplying operating nitrogen to the Safety Grade Instrument Gas (SGIG) system headers for Peach Bottom Units 2 and 3. The valve was re-opened at 1445 (within the one hour action time required by Technical Specifications) and other system valves were verified to be in the required positions.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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00:00:00, 24 August 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>.
22:31:53, 24 September 2017 +
21:21:00, 24 August 2009 +
true +
false +
0.129 d (3.1 hours, 0.0185 weeks, 0.00425 months) +
18:15:00, 24 August 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.