05000327/FIN-2011006-02
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Finding | |
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| Title | Failure to Establish Compensatory Actions for Blocked Sprinklers |
| Description | 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 failure to establish compensatory measures for an obstructed sprinkler system. Specifically, scaffolding installed in auxiliary building fire area FAA-054/Room A01 was in a configuration which obstructed sprinkler heads A198 and A208. The licensee entered this issue into the corrective action program as Problem Evaluation Report 321911 and implemented compensatory measures (fire watches) in accordance with the approved fire protection program. This finding was determined to be a performance deficiency because the licensee did not provide the required compensatory measures (fire watch) for sprinkler heads that were obstructed or blocked by scaffolding. This finding was more than minor because it affected the reactor safety mitigating systems cornerstone attribute of protection against external factors (i.e., fire) and it affected fire protection defense-in-depth strategies involving suppression systems. Failure to provide compensatory measures for obstructed sprinkler heads A198 and A208 would have reduced the licensees ability to quickly extinguish a fire in the area. The inspectors evaluated this issue in accordance with Inspection Manual Chapter (IMC) 0609, Appendix F, Fire Protection Significance Determination Process, and determined that this finding was of very low safety significance (Green). The finding category of fixed fire protection systems was assigned, based upon that element of the plant fire protection program being impacted. The inspectors assigned a low degradation rating that reflected the severity of the observed deficiency. This rating was based upon meeting the criteria described in IMC 0609, Appendix F, Attachment 2 for fixed fire detection and suppression degradation. Specifically, less than 10% of the sprinkler heads were non-functional, there were functional heads within 10 feet of the combustibles of concern and the system was nominally code compliant. This finding was determined to have a cross cutting aspect in the Human Performance Area, Work Practices Component, because the licensee failed to define and effectively communicate expectations regarding procedural compliance and requirements for personnel to follow procedures |
| Site: | Sequoyah  |
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| Report | IR 05000327/2011006 Section 1R05 |
| Date counted | Mar 31, 2011 (2011Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | N Merriweather M Thomas R Fanner R Nease L Suggs J Dymek |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - Sequoyah - IR 05000327/2011006 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Sequoyah) @ 2011Q1
Self-Identified List (Sequoyah)
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