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The design data used to support Dominion's … The design data used to support Dominion's methodology to cope with a loss of (RCP) seal cooling (which was based on Westinghouse WCAP-10541 Rev. 2) may be non-conservative. The NRC issued an SER on Westinghouse report WCAP-15603 that indicates data from this new model must consider a 20% probability that the hot RCP seals may result in up to 182 gpm leakage per pump if seal cooling is lost for more than 13 minutes. Assuming this higher leak rate, the requirements of Appendix R, Section III.L, cannot be met since Pressurizer level could not be maintained. Current methodology indicates Surry will lose charging and seal cooling for greater than 13 minutes from a fire in the Emergency Switchgear Room. This report is being made pursuant to 10 CFR 50.72 (b)(3)(ii)(B). </br>The NRC resident (inspector) was notified of this condition.inspector) was notified of this condition. +
22:20:00, 3 November 2003 +
40,292 +
17:36:00, 3 November 2003 +
22:20:00, 3 November 2003 +
The design data used to support Dominion's … The design data used to support Dominion's methodology to cope with a loss of (RCP) seal cooling (which was based on Westinghouse WCAP-10541 Rev. 2) may be non-conservative. The NRC issued an SER on Westinghouse report WCAP-15603 that indicates data from this new model must consider a 20% probability that the hot RCP seals may result in up to 182 gpm leakage per pump if seal cooling is lost for more than 13 minutes. Assuming this higher leak rate, the requirements of Appendix R, Section III.L, cannot be met since Pressurizer level could not be maintained. Current methodology indicates Surry will lose charging and seal cooling for greater than 13 minutes from a fire in the Emergency Switchgear Room. This report is being made pursuant to 10 CFR 50.72 (b)(3)(ii)(B). </br>The NRC resident (inspector) was notified of this condition.inspector) was notified of this condition. +
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00:00:00, 3 November 2003 +
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>.
02:24:52, 2 March 2018 +
17:36:00, 3 November 2003 +
false +
-0.197 d (-4.73 hours, -0.0282 weeks, -0.00648 months) +
22:20:00, 3 November 2003 +
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.
WCAP-10541 + and WCAP-15603 +