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While reviewing the licensing basis inform … While reviewing the licensing basis information for flooding, the inspectors found that the FSAR described design features to mitigate external flooding. Specifically, the FSAR described a postulated flood occurring through simultaneous melting of a large amount of snow in spring combined with sustained heavy rains. The FSAR states that the combined amount of water for both would be an approximately 1,400 acre-feet area which would be dissipated by natural drainage of the site, a storm sewer system, and an interceptor ditch. The inspectors questioned the licensee regarding the absence of procedures to determine how design features described were maintained and controlled. Additionally, the inspectors reviewed the licensees abnormal operating procedure AOP-13C, Severe Weather Conditions, and found that, while one of the entry conditions was notification or validation of flood watch or warning, the procedure did not address, or direct personnel to take, actions as for the external flooding conditions described in the FSAR. The inspectors are awaiting additional information from the licensee regarding whether the statements in the FSAR were correct and/or if procedures existed. Additionally, the FSAR describes a postulated flood occurring when waves from Lake Michigan break over the bank surrounding the circulating water/service water pumphouse. The FSAR indicated that if the storm sewer system was not adequate enough to drain the water, it could seep into the adjacent turbine building through doors and affect the continued operation of essential equipment such as the EDGs or the risk significant instrument air compressors. Therefore, the site would protect the turbine building and pumphouse by using sandbags, concrete jersey barriers, or equivalent barriers. The inspectors found that the licensee had both concrete barriers and sandbags available for protecting from these phenomena, but based on a review of procedure PC 80 Part 7, Lake Water Level Determination, guidance was only provided for installation of concrete jersey barriers. The inspectors found no additional procedures for responding to external flooding condition described in the FSAR for the raising lake level or the use of sandbags. At the close of this inspection period, the inspectors were awaiting additional information from the licensee with respect to alternate procedures or protective measures. The inspectors opened this URI to determine whether a performance deficiency existed regarding the licensees external flooding design features and mitigating strategies as described in the FSAR. Specifically, the FSAR describe several design features and mitigation strategies for which the licensee needed to provide additional information to support that the features/strategies were appropriately designed, tested, maintained, and procedurally controlled for event response.rocedurally controlled for event response.
23:59:59, 31 March 2012 +
23:59:59, 31 March 2012 +
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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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>.
00:45:01, 21 February 2018 +
23:59:59, 31 March 2012 +