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On April 16, 2012, at 0738 hours, the Harr … On April 16, 2012, at 0738 hours, the Harris Nuclear Plant notified the NRC Operations Center (i.e., Event Number 47838) of preplanned maintenance on the Technical Support Center (TSC) normal power supply.</br>Following completion of the power transfer, it was discovered that in the current alignment, the TSC is only powered from one power source, which is the backup power supply. </br>A backup diesel generator is stationed near the TSC which can be connected if necessary during an emergency.</br>Activities are in progress to modify the existing procedure to allow the TSC to be connected to the offsite power source which will restore two sources of power to the TSC. This normal power arrangement is expected to remain in place while maintenance is performed on the TSC normal power supply for approximately two months.</br>The NRC Resident Inspector has been informed.</br>This report was made in accordance with 10 CFR 50.72(b)(3)(xiii).</br>* * * UPDATE FROM JOHN CAVES TO JOE O'HARA AT 1211 EDT ON 5/22/12 * * *</br>On April 19, 2012, the power configuration was revised to restore the availability of two sources of power to the TSC. An extent of condition review identified two similar conditions in 2009 and 2010 where the TSC had only one source of power for approximately two months each time. The backup diesel generator described in the initial report was not available during these two periods; providing an alternate power source in the event it was needed would have required lifting a clearance and closing a breaker. These conditions might be of generic interest or concern and are therefore provided as a follow-up report.</br>The NRC Resident Inspector has been notified.</br>Notified R2DO (Shaeffer).s been notified.
Notified R2DO (Shaeffer). +
13:00:00, 17 April 2012 +
47,843 +
16:45:00, 17 April 2012 +
13:00:00, 17 April 2012 +
On April 16, 2012, at 0738 hours, the Harr … On April 16, 2012, at 0738 hours, the Harris Nuclear Plant notified the NRC Operations Center (i.e., Event Number 47838) of preplanned maintenance on the Technical Support Center (TSC) normal power supply.</br>Following completion of the power transfer, it was discovered that in the current alignment, the TSC is only powered from one power source, which is the backup power supply. </br>A backup diesel generator is stationed near the TSC which can be connected if necessary during an emergency.</br>Activities are in progress to modify the existing procedure to allow the TSC to be connected to the offsite power source which will restore two sources of power to the TSC. This normal power arrangement is expected to remain in place while maintenance is performed on the TSC normal power supply for approximately two months.</br>The NRC Resident Inspector has been informed.</br>This report was made in accordance with 10 CFR 50.72(b)(3)(xiii).</br>* * * UPDATE FROM JOHN CAVES TO JOE O'HARA AT 1211 EDT ON 5/22/12 * * *</br>On April 19, 2012, the power configuration was revised to restore the availability of two sources of power to the TSC. An extent of condition review identified two similar conditions in 2009 and 2010 where the TSC had only one source of power for approximately two months each time. The backup diesel generator described in the initial report was not available during these two periods; providing an alternate power source in the event it was needed would have required lifting a clearance and closing a breaker. These conditions might be of generic interest or concern and are therefore provided as a follow-up report.</br>The NRC Resident Inspector has been notified.</br>Notified R2DO (Shaeffer).s been notified.
Notified R2DO (Shaeffer). +
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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>.
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