05000483/FIN-2013003-01
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Finding | |
|---|---|
| Title | Failure to Monitor and Maintain Emergency Core Cooling System Room Coolers |
| Description | The inspectors identified a non-cited violation of 10 CFR 50.65, involving the licensees failure to monitor performance of structures, systems, or components in a manner sufficient to provide reasonable assurance that these structures, systems, or components are capable of fulfilling their intended functions. Specifically, the licensee failed to adequately monitor the cooling water flow through the safety related room coolers that periodically became blocked by silting, to ensure they maintained their capability to remove the heat from the rooms. This issue was entered into the licensees corrective action program as Callaway Action Request 201301108. Corrective actions included a requirement to monitor the flow rates monthly and determine the appropriate monitoring and flushing requirements based on the results. The failure to monitor performance of structures, systems, or components in a manner sufficient to provide reasonable assurance that these structures, systems, or components are capable of fulfilling their intended functions was a performance deficiency. This performance deficiency was more than minor because it adversely affected the equipment performance attribute of the Mitigating Systems Cornerstone, and affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Using Inspection Manual Chapter 0609, Appendix A, Exhibit 2, Mitigating Systems Screening Questions, the finding was determined to be of very low safety significance (Green) because all of the questions received a negative response. This finding has a cross-cutting aspect in the area of problem identification and resolution associated with the operating experience component because the licensee failed to systematically collect, evaluate, and communicate relevant internal operating experience about silting of room coolers to internal stakeholders. |
| Site: | Callaway  |
|---|---|
| Report | IR 05000483/2013003 Section 1R12 |
| Date counted | Jun 30, 2013 (2013Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | P Smagacz T Hartman W Sifre J Dykert J Laughlin L Carson N Greene N O 'Keef |
| Violation of: | 10 CFR 50.65 |
| CCA | P.5, Operating Experience |
| INPO aspect | CL.1 |
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Finding - Callaway - IR 05000483/2013003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Callaway) @ 2013Q2
Self-Identified List (Callaway)
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