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The following event description is based o … The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.</br>On Friday, November 23, 2007, at 22:26 Mountain Standard Time (MST) Palo Verde Nuclear Station Unit 1 initiated a normal reactor shutdown to comply with Condition H of Technical Specifications (TS) Limiting Condition for Operation (LCO) 3.8.1. </br>TS LCO 3.8.1 requires that automatic load sequencers for train A and B be operable in Modes 1, 2, 3 and 4. The shutdown is necessary due to an inoperable automatic load sequencer for train A in Unit 1. The train A automatic load sequencer was declared inoperable on November 22, 2007, at 19:30 MST and was not restored to operable status within the TS required 24 hour completion time of Condition F of TS 3.8.1. TS 3.8.1 Condition H requires the plant to be placed in MODE 3 within 6 hours and MODE 5 within 36 hours if the required actions and associated completion time of TS Condition F are not met. Efforts are in progress to correct the condition.</br>The event did not result in the release of radioactivity to the environment and did not adversely affect the safe operation of the plant or health and safety of the public.</br>The licensee is taking measures to evaluating the extent of this condition from the remaining automatic load sequencers for Units 1, 2 and 3. The inoperability was discovered due to an invalid actuation of the A train load sequencer that resulted in a pond spray pump initiation.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
05:26:00, 24 November 2007 +
43,804 +
01:08:00, 24 November 2007 +
05:26:00, 24 November 2007 +
The following event description is based o … The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.</br>On Friday, November 23, 2007, at 22:26 Mountain Standard Time (MST) Palo Verde Nuclear Station Unit 1 initiated a normal reactor shutdown to comply with Condition H of Technical Specifications (TS) Limiting Condition for Operation (LCO) 3.8.1. </br>TS LCO 3.8.1 requires that automatic load sequencers for train A and B be operable in Modes 1, 2, 3 and 4. The shutdown is necessary due to an inoperable automatic load sequencer for train A in Unit 1. The train A automatic load sequencer was declared inoperable on November 22, 2007, at 19:30 MST and was not restored to operable status within the TS required 24 hour completion time of Condition F of TS 3.8.1. TS 3.8.1 Condition H requires the plant to be placed in MODE 3 within 6 hours and MODE 5 within 36 hours if the required actions and associated completion time of TS Condition F are not met. Efforts are in progress to correct the condition.</br>The event did not result in the release of radioactivity to the environment and did not adversely affect the safe operation of the plant or health and safety of the public.</br>The licensee is taking measures to evaluating the extent of this condition from the remaining automatic load sequencers for Units 1, 2 and 3. The inoperability was discovered due to an invalid actuation of the A train load sequencer that resulted in a pond spray pump initiation.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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, 24 November 2007 +
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>.
02:15:32, 2 March 2018 +
01:08:00, 24 November 2007 +
true +
false +
-0.179 d (-4.3 hours, -0.0256 weeks, -0.00589 months) +
05:26:00, 24 November 2007 +
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.