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During system walkdown, the team observed … During system walkdown, the team observed degraded watertight doors at the intake cooling structure which houses the residual heat removal service water (RHRSW) and emergency equipment cooling water (EECW) pumps. Subsequent licensee evaluation of the four watertight doors determined that three of the four were degraded. With the doors closed, gaps up to 12 inch existed between the door seal and door frame. The licensee initiated work orders to repair the doors and initiated PER 133899. The UFSAR (Section 12.2.7.1.2) states in part that the doors provide flood protection against the probable maximum flood (PMF) of 572.5 feet. For the PMF, the licensee located a TVA corporate calculation (GEN-CEB-CDQ-0999-98-00-01) which states the PMF is 569.2 feet, not 572.5 feet. This item is unresolved pending the following: 1. The licensees acceptance of the 1998 calculation as their design basis for the PMF. 2. The inspectors review of the new design basis for the PMF. 3. Using the revised PMF, the inspectors review and inspection of the licensees evaluation of the potential impact of the degraded doors. This item is identified as URI 05000259/2007007-03, 05000260/2007007-03 and 05000296/2007007-03, Degraded Flood Protection Doors for the Intake Cooling Structure.on Doors for the Intake Cooling Structure. +
23:59:59, 31 December 2007 +
23:59:59, 31 December 2007 +
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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>.
00:32:37, 21 February 2018 +
23:59:59, 31 December 2007 +