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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 March 21, 2009, from approximately 09:00 Mountain Standard Time (MST) until 14:00 MST, Palo Verde maintenance personnel will be performing scheduled maintenance to repair one of two redundant 120 VAC power supplies in Unit 2 that provides power to various alarms in the main control room. This work will require both power supplies to be de-energized resulting in approximately 50 percent of the Unit 2 plant annunciators being unavailable.</br>The following compensatory measures will be in place for the duration of the scheduled work:</br> </br> Other assessment indications will remain available: </br> Plant Monitoring System</br> Qualified Safety Parameter Display System</br> Emergency Response Facility Data Acquisition System</br> No changes in plant power or operating mode are planned.</br> A third licensed operator will be in the control room.</br>The NRC Resident Inspector has been notified of the scheduled outage and this ENS call.</br>* * * UPDATE FROM JAMES BLAZEK TO DONALD NORWOOD AT 1821 EDT ON MARCH 21, 2009 * * *</br>The power supply was successfully repaired and all annunciators were restored to normal as of 1515 MST.</br>The Licensee will notify the NRC Resident Inspector.</br>Notified R4DO (Hay) and NRR EO (Holian)..
Notified R4DO (Hay) and NRR EO (Holian). +
16:00:00, 21 March 2009 +
44,924 +
11:53:00, 21 March 2009 +
16:00:00, 21 March 2009 +
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 March 21, 2009, from approximately 09:00 Mountain Standard Time (MST) until 14:00 MST, Palo Verde maintenance personnel will be performing scheduled maintenance to repair one of two redundant 120 VAC power supplies in Unit 2 that provides power to various alarms in the main control room. This work will require both power supplies to be de-energized resulting in approximately 50 percent of the Unit 2 plant annunciators being unavailable.</br>The following compensatory measures will be in place for the duration of the scheduled work:</br> </br> Other assessment indications will remain available: </br> Plant Monitoring System</br> Qualified Safety Parameter Display System</br> Emergency Response Facility Data Acquisition System</br> No changes in plant power or operating mode are planned.</br> A third licensed operator will be in the control room.</br>The NRC Resident Inspector has been notified of the scheduled outage and this ENS call.</br>* * * UPDATE FROM JAMES BLAZEK TO DONALD NORWOOD AT 1821 EDT ON MARCH 21, 2009 * * *</br>The power supply was successfully repaired and all annunciators were restored to normal as of 1515 MST.</br>The Licensee will notify the NRC Resident Inspector.</br>Notified R4DO (Hay) and NRR EO (Holian)..
Notified R4DO (Hay) and NRR EO (Holian). +
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100 +
00:00:00, 21 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>.
02:12:29, 2 March 2018 +
11:53:00, 21 March 2009 +
true +
false +
-0.172 d (-4.12 hours, -0.0245 weeks, -0.00564 months) +
16:00:00, 21 March 2009 +
Various Control Room Annunciators and Alarms Out of Service Due to Maintenance on Power Supply +
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.