Browse wiki
Jump to navigation
Jump to search
The inspectors identified a non-cited viol … The inspectors identified a non-cited violation of Sequoyah operating license conditions 2.C. (16) and 2.C. (13) for Units 1 and 2 respectively, for a change made to the Sequoyah fire protection program which was determined to adversely affect safe shutdown (SSD), without prior NRC approval. Specifically, in lieu of protecting the cables and equipment to ensure that one train of equipment required for SSD was free of fire damage, the licensee made a change to the Sequoyah fire protection program in 2002 that added new operator manual actions (OMAs) to achieve SSD, without prior NRC approval. The evaluation performed in 2002 for the new OMAs was not adequate to support the conclusion that adding the OMAs did not adversely affect post-fire SSD because the evaluation only addressed OMA feasibility and did not address defense-in-depth. The licensee entered this issue in the corrective action program as problem evaluation report 324757 to track resolution. This finding was determined to be more than minor because it affected the reactor safety mitigating systems cornerstone attribute of protection against external factors (i.e., fire). The inspectors evaluated this finding in accordance with Inspection Manual Chapter 0609, Significance Determination Process (SDP), Appendix F, Fire Protection Significance Determination Process. The inspectors performed a Phase 1 and Phase 2 SDP screening assessment using IMC 0609, Appendix F, Attachment 1. Based upon the SDP Phase 2 results, the inspectors were not able to screen out the issue. Further evaluation was conducted during a Phase 3 analysis performed by the senior reactor analyst. The analyst determined that the risk significance of the OMAs associated with the change made to the Sequoyah fire protection program was very low (3.13E-8, Green). The main contributors to the low risk results were: (1) the low likelihood of a human failure given the extensive time available to take the OMAs, (2) the redundancy of opposite train equipment for severely damaging fires in certain fire areas, and (3) the low number of fire areas and fire sequences that were ultimately analyzed. The inspectors determined that there was no cross-cutting aspect associated with this finding because the change to the fire protection program occurred in 2002 and was not reflective of current licensee performance.eflective of current licensee performance.
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>.
05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 +, 05000327/FIN-2012002-06 + and 05000327/FIN-2012002-06 +
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>.
00:45:23, 21 February 2018 +
23:59:59, 31 March 2012 +
Change to Fire Protection Program Which Adversely Affected Safe Shutdown Without Prior NRC Approval +