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On February 15, 2012, with Unit 1 shutdown … On February 15, 2012, with Unit 1 shutdown for an RFO, it was identified that two doors to the Unit 1 TDRFP rooms (doors 203 and 207) were propped open with cables and hoses. Corrective action program documents estimated that the doors were propped open for about 12 hours. Doors 203 and 207 were required to remain shut to act as HELB barriers while the floor plugs in the TDRFP rooms were removed, since the open plugs allowed the rooms to communicate with the Unit 1 auxiliary building. It is yet unknown as to the full extent of SSCs that were at risk within the auxiliary building as a result of the defeated hazard barriers. The lack of protection from a postulated Unit 2-generated HELB had the potential to adversely affect the operability/functionality of any SSCs in the area not environmentally qualified for the harsh conditions that a HELB might produce. In response to the inspectors questions about the specific SSCs that could have been affected, the licensee sought assistance from an outside contractor to perform an analysis of the postulated HELB effects. The results of this analysis will be required for the inspectors to complete their assessment of this issue. Therefore, an Unresolved Item is opened pending further review by the NRC staff of the licensees analysis. (URI 05000373/2012002-01 and 05000374/2012002-01), Potential Impact on Operability of Safety-Related Components Due to Defeated High Energy Line Break Barrierso Defeated High Energy Line Break Barriers +
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>.
00:45:02, 21 February 2018 +
23:59:59, 31 March 2012 +
Potential Impact on Operability of Safety-Related Components Due to Defeated High Energy Line Break Barriers +