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On October 22, 2010, the station confirmed … On October 22, 2010, the station confirmed the following: </br>On a safety injection (SI) event with no loss of offsite power (LOOP), calculations show that at various points in the load sequence, the voltage at the charger Motor Control Center will dip low enough on the SI unit to lockup both of the chargers. Additionally, when considering out of sequence loads, such as the containment spray pump, starting on the emergency diesel generator during normal load sequencing, the potential exists that the voltage for any of the chargers on an SI event with a LOOP may drop to the point that would cause the chargers to lockup.</br>On October 22, 2010, the station completed an operability evaluation of the 11, 12, 21, and 22 battery chargers, implemented compensatory measures to restore battery chargers in the event of an SI to maintain operability (a simple manual action to restart the charger), and determined that the battery chargers were operable but non-conforming. </br>The NRC Resident (Inspector) has been informed.</br>The licensee is planning on correcting this issue during the next refueling outage.is issue during the next refueling outage. +
00:49:00, 23 October 2010 +
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18:37:00, 23 December 2010 +
00:49:00, 23 October 2010 +
On October 22, 2010, the station confirmed … On October 22, 2010, the station confirmed the following: </br>On a safety injection (SI) event with no loss of offsite power (LOOP), calculations show that at various points in the load sequence, the voltage at the charger Motor Control Center will dip low enough on the SI unit to lockup both of the chargers. Additionally, when considering out of sequence loads, such as the containment spray pump, starting on the emergency diesel generator during normal load sequencing, the potential exists that the voltage for any of the chargers on an SI event with a LOOP may drop to the point that would cause the chargers to lockup.</br>On October 22, 2010, the station completed an operability evaluation of the 11, 12, 21, and 22 battery chargers, implemented compensatory measures to restore battery chargers in the event of an SI to maintain operability (a simple manual action to restart the charger), and determined that the battery chargers were operable but non-conforming. </br>The NRC Resident (Inspector) has been informed.</br>The licensee is planning on correcting this issue during the next refueling outage.is issue during the next refueling outage. +
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00:00:00, 23 December 2010 +
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>.
02:08:09, 2 March 2018 +
18:37:00, 23 December 2010 +
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61.7 d (1,480.8 hours, 8.814 weeks, 2.028 months) +
00:49:00, 23 October 2010 +
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.