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Preliminary hydraulic analysis, performed … Preliminary hydraulic analysis, performed by Entergy, indicated that the highest containment sump water temperature for a small break LOCA was about 195 degrees Fahrenheit (EF). Entergy received an initial evaluation for minimum flow from the pump vendor (Flowserve) in a letter dated November 9, 2007, which stated, in part, that while 900 gpm is recommended for continuous operation, 200 gpm is acceptable for up to a three hour duration in any 24 hour period. In addition, Flowserve stated that if the suction water temperature was less than or equal to 200EF, and the temperature rise in the pump did not result in flashing, then extended operation would only result in shortened pump life (i.e., not a short term pump failure). Based on the preliminary information, Entergy concluded that the pumps will operate satisfactorily under all design basis accident conditions. The team evaluated Entergys immediate corrective actions, including EOP changes, and Entergys operability assessment and found these actions and assessments to be reasonable. Entergy is evaluating recirculation system hydraulic models and small break LOCA accident scenarios to determine expected minimum reactor core flows and individual pump flows. In addition, Entergy is evaluating recirculation pump design characteristics to determine pump minimum flow requirements. The acceptability of Entergy's final determination of pump minimum flow requirements will be an unresolved item (URI), pending further NRC review.ed item (URI), pending further NRC review. +
23:59:59, 31 December 2007 +
23:59:59, 31 December 2007 +
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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S Kobylarz +, W Sherbin +, O Mazzoni +, L Doeflein +, Stephen Pindale +, T Sicola +, L Scholl +, Kevin Mangan +, Adam Ziedonis +, L Doerfleing +, Ottenbergj Richmond + and Shawn Smith +
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>.
00:32:31, 21 February 2018 +
S Kobylarz +, W Sherbin +, O Mazzoni +, L Doeflein +, Stephen Pindale +, T Sicola +, L Scholl +, Kevin Mangan +, Adam Ziedonis +, L Doerfleing +, Ottenbergj Richmond + and Shawn Smith +
23:59:59, 31 December 2007 +