05000254/FIN-2011009-02
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Finding | |
|---|---|
| Title | Failure to Perform Required In-Service Testing of Shutdown Cooling Suction Valves |
| Description | The inspectors identified a finding of very low safety significance (Green) and associated Non-Cited Violation of Technical Specification 5.5.6, Inservice Testing Program, for the failure to perform required testing in accordance with the American Society of Mechanical Engineers Code for eight valves that had active safety functions. Specifically, the licensee failed to test eight valves which were required to operate in Mode 3 to return the residual heat removal system from the shutdown cooling mode to the low pressure coolant injection mode of operation. The licensee entered this finding into their corrective action program and verified the valves were operable based on recent exercising of the valves during the last refueling outages. The performance deficiency was determined to be more than minor because it was associated with the Mitigating Systems Cornerstone attribute of Equipment Performance, and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, degraded valve performance could go undetected without periodic testing and trending. The finding screened as very low safety significance (Green) because the finding was not a design or qualification deficiency, did not represent a loss of system safety function, and did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. The finding had no cross-cutting aspect because the incorrect valve classification was not indicative of current performance. |
| Site: | Quad Cities  |
|---|---|
| Report | IR 05000254/2011009 Section 1R21 |
| Date counted | Dec 31, 2011 (2011Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | Z Falevits S Sheldon W Sherbin D Melendez-Colon C Brown N Feliz-Adomo A Stone J Chiloyen |
| INPO aspect | |
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Finding - Quad Cities - IR 05000254/2011009 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Quad Cities) @ 2011Q4
Self-Identified List (Quad Cities)
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