05000315/FIN-2013004-07
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Finding | |
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Title | Licensee-Identified Violation |
Description | The licensee identified a finding of very low safety significance (Green) and associated NCV of License Condition 2.C(4) for Unit 1 and 2.C(3)(o) for Unit 2 through a planned work order for the failure to implement and maintain in effect all provisions of their approved fire protection program. Specifically, the installation of the pre-action sprinkler system on the 587-foot, 609-foot, and 633-foot elevations of the auxiliary building did not comply with National Fire Protection Association Standard 13, Standard for the Installation of Sprinkler System, (1971) section 3211 and (1983) section 3-11.1.1, both of which require that all sprinkler pipe and fittings shall be so installed that the system may be drained. This resulted in the plugging of portions of the pre-action sprinkler system, which could have resulted in portions of the system being non-functional during a fire. The performance deficiency was determined to be more than minor because it was associated with the Mitigating Systems cornerstone attribute of protection against external factors (fire) and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). The Region III Senior Risk Analyst used the risk assessment tools of IMC 0609, Appendix F, Fire Protection SDP, and performed bounding analyses using the DC Cook SPAR model, Version 8.22 and Systems Analysis Programs for Hands-on Integrated Reliability Evaluations version 8.0.9.0 software. The finding was determined to be of very low safety significance (Green) because the risk increase using bounding assumptions was below 1E-6 per year. The licensee entered this issue into their CAP as AR 2013-7845, Fire Protection Piping Plugged, dated May 28, 2013, and restored the functionality of the sprinkler system by flushing the affected piping and replacing piping and sprinkler heads as required. The licensee planned on evaluating additional corrective actions to reduce the amount of corrosion in the pre-action sprinkler system. |
Site: | Cook ![]() |
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Report | IR 05000315/2013004 Section 4OA7 |
Date counted | Sep 30, 2013 (2013Q3) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | Licensee-identified |
Inspection Procedure: | |
Inspectors (proximate) | D Szwarc M Mitchell J Lennartz J Benjamin J Ellegood P Laflamme |
Violation of: | License Condition - Fire Protection License Condition |
INPO aspect | |
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Finding - Cook - IR 05000315/2013004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Cook) @ 2013Q3
Self-Identified List (Cook)
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