05000397/FIN-2014004-01
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Finding | |
|---|---|
| Title | Failure to Comply with Ultimate Heat Sink Technical Specification Level Requirements |
| Description | The inspectors identified a non-cited violation of Technical Specification 3.7.1, Standby Service Water System and Ultimate Heat Sink, for the licensees failure to take the required actions for an inoperable ultimate heat sink. Specifically, the licensee failed to take action, as required by the plants technical specifications, when the water level in an individual ultimate heat sink spray pond was less than 432 feet 9 inches mean sea level. Following discovery of this issue, the licensee issued a night order and revised procedures to specify that both standby service water spray ponds had to be greater than 432 feet 9 inches MSL to meet the plants technical specification surveillance requirements. The licensee entered this issue into their corrective action program as AR 312706312706 The performance deficiency was more than minor because it affected the equipment performance attribute of the Mitigating System cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors performed the initial significance determination for the performance deficiency using NRC Inspection Manual 0609, Appendix A, Exhibit 2 Mitigating System Screening Questions, dated July 1, 2012. The finding required a detailed risk evaluation because it involved the potential loss of one train of a risk-significant system for longer than the technical specification allowed outage time. Therefore, a Region IV senior reactor analyst performed a detailed risk evaluation that determined that the finding was of very low safety significance (Green). The finding did not contribute to the large early release frequency. This finding had a cross-cutting aspect in the area of problem identification and resolution, selfassessments, because a 2013 self-assessment was not critical and thorough when reviewing the use of average spray pond level to meet technical specification inventory requirements. |
| Site: | Columbia  |
|---|---|
| Report | IR 05000397/2014004 Section 1R01 |
| Date counted | Sep 30, 2014 (2014Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.01 |
| Inspectors (proximate) | D Bradley G George J Groom J O'Donnell P Hernandez |
| Violation of: | Technical Specification - Procedures Technical Specification |
| CCA | P.6, Self-Assessment |
| INPO aspect | CL.2 |
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Finding - Columbia - IR 05000397/2014004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Columbia) @ 2014Q3
Self-Identified List (Columbia)
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