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This notification is being made in accorda … This notification is being made in accordance with 10 CFR 50.73(a)(i), which states, in part; that in case of an invalid actuation reported under 10 CFR 50.73(a)(2)(iv)(A), other than the actuation of the Reactor Protection System when the reactor is critical, the licensee may provide a telephone notification to the NRC within 60 days after discovery of the event instead of submitting a written Licensee Event Report. </br>On November 21, 2009, at 2113 PST, EDG 2-1 automatically started, but did not load, due to an attempted replacement of an indicating light that caused a control circuit electrical short and opening the power supply fuse. EDG 2-2 and EDG 2-3 were unaffected by this event. Plant operators entered TS 3.8.1, AC Sources - Operating, due to the loss of the Startup Feeder indication circuit. No actual condition requiring the start of EDG 2-1 existed. </br>The EDG 2-1 4kV Bus Start up Transfer Feeder Undervoltage Relay was placed in bypass (knife switch #10 for relay 27 HGU opened), the EDG was shutdown at 2147 PST and placed in standby operation at 2148 PST. This inadvertent start relay input is not a required safety function, but provides an anticipatory start of the EDG. The actuated relay input is not required for operability, thus the EDG was operable at 2148 PST. </br>Electrical Maintenance replaced the affected sensing relay circuit fuse (52HG14 "UA" fuses), tightened the indicating light socket for SUT 2 2 Potential C A Phase, and reset 27HGU (Startup Feeder UV for 4kV Bus G). On November 22, 2009, at 0729 PST, TS 3.8.1 was exited. </br>The consequences of this event were limited to the unplanned start of EDG 2-1. The EDG started and functioned in accordance with its design. Since no valid signal which required the EDG to start, and since the start occurred inadvertently as the result of a known maintenance action (resulting in a single component failure, a protective fuse opening), this event has been classified as an invalid actuation. </br>The licensee has notified the NRC Resident Inspector.e has notified the NRC Resident Inspector.
05:13:00, 22 November 2009 +
45,585 +
11:14:00, 22 December 2009 +
05:13:00, 22 November 2009 +
This notification is being made in accorda … This notification is being made in accordance with 10 CFR 50.73(a)(i), which states, in part; that in case of an invalid actuation reported under 10 CFR 50.73(a)(2)(iv)(A), other than the actuation of the Reactor Protection System when the reactor is critical, the licensee may provide a telephone notification to the NRC within 60 days after discovery of the event instead of submitting a written Licensee Event Report. </br>On November 21, 2009, at 2113 PST, EDG 2-1 automatically started, but did not load, due to an attempted replacement of an indicating light that caused a control circuit electrical short and opening the power supply fuse. EDG 2-2 and EDG 2-3 were unaffected by this event. Plant operators entered TS 3.8.1, AC Sources - Operating, due to the loss of the Startup Feeder indication circuit. No actual condition requiring the start of EDG 2-1 existed. </br>The EDG 2-1 4kV Bus Start up Transfer Feeder Undervoltage Relay was placed in bypass (knife switch #10 for relay 27 HGU opened), the EDG was shutdown at 2147 PST and placed in standby operation at 2148 PST. This inadvertent start relay input is not a required safety function, but provides an anticipatory start of the EDG. The actuated relay input is not required for operability, thus the EDG was operable at 2148 PST. </br>Electrical Maintenance replaced the affected sensing relay circuit fuse (52HG14 "UA" fuses), tightened the indicating light socket for SUT 2 2 Potential C A Phase, and reset 27HGU (Startup Feeder UV for 4kV Bus G). On November 22, 2009, at 0729 PST, TS 3.8.1 was exited. </br>The consequences of this event were limited to the unplanned start of EDG 2-1. The EDG started and functioned in accordance with its design. Since no valid signal which required the EDG to start, and since the start occurred inadvertently as the result of a known maintenance action (resulting in a single component failure, a protective fuse opening), this event has been classified as an invalid actuation. </br>The licensee has notified the NRC Resident Inspector.e has notified the NRC Resident Inspector.
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00:00:00, 22 December 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>.
02:10:35, 2 March 2018 +
11:14:00, 22 December 2009 +
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30.251 d (726.02 hours, 4.322 weeks, 0.995 months) +
05:13:00, 22 November 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.