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At 1418 EDT on 03/17/2014, it was determin … At 1418 EDT on 03/17/2014, it was determined the atmospheric stability classification data display on the plant process computer (PPC) could have been potentially inaccurate.</br>In September 2012, implementation of a hardware and software modification to separate the meteorological tower computer from the PPC introduced a calculation error to the PPC software design that resulted in the PPC potentially displaying inaccurate stability class data. The ability to accurately perform dose assessment calculations could potentially be affected when using the stability class indication obtained from the PPC.</br>The availability and accuracy of backup stability class data via the meteorological tower computer or from Weather Services International were not affected.</br>Within 24 hours of discovery, the procedurally described alternatives for obtaining stability class data were implemented.</br>Subsequently, the PPC stability class software calculation was corrected and the PPC stability class display restored for use.</br>There was no impact to any emergency declaration because there were no actual emergencies from the time the modification was implemented until the error was corrected.</br>The licensee has notified the NRC Resident Inspector.e has notified the NRC Resident Inspector. +
18:18:00, 17 March 2014 +
15:12:00, 17 March 2014 +
18:18:00, 17 March 2014 +
At 1418 EDT on 03/17/2014, it was determin … At 1418 EDT on 03/17/2014, it was determined the atmospheric stability classification data display on the plant process computer (PPC) could have been potentially inaccurate.</br>In September 2012, implementation of a hardware and software modification to separate the meteorological tower computer from the PPC introduced a calculation error to the PPC software design that resulted in the PPC potentially displaying inaccurate stability class data. The ability to accurately perform dose assessment calculations could potentially be affected when using the stability class indication obtained from the PPC.</br>The availability and accuracy of backup stability class data via the meteorological tower computer or from Weather Services International were not affected.</br>Within 24 hours of discovery, the procedurally described alternatives for obtaining stability class data were implemented.</br>Subsequently, the PPC stability class software calculation was corrected and the PPC stability class display restored for use.</br>There was no impact to any emergency declaration because there were no actual emergencies from the time the modification was implemented until the error was corrected.</br>The licensee has notified the NRC Resident Inspector.e has 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>.
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00:00:00, 17 March 2014 +
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>.
22:20:37, 24 September 2017 +
15:12:00, 17 March 2014 +
true +
false +
-0.129 d (-3.1 hours, -0.0185 weeks, -0.00425 months) +
18:18:00, 17 March 2014 +
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.