05000220/FIN-2011005-03
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Finding | |
|---|---|
| Title | Failure to Follow Valve Packing Procedure |
| Description | A Green self-revealing NCV of technical specification (TS) 5.4.1, Procedures, was identified for NMPNS\\\' failure to properly implement S-MMP-GEN-201 , Site Valve Packing Procedure, Revision 00600 when maintenance personnel repacked recirculation pump discharge isolation valve 2RCS*MOV18A in August 2011. As a result, on December 9, 2011, the packing for valve 2RCS*MOV18A failed and unidentified reactor coolant system (RCS) leakage increased above the TS limit of a 2 gpm increase per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> forcing a plant shutdown. NMPNS\\\' immediate corrective actions were to repair the valve stem and install a live loaded packing system on the recirculation discharge isolation valves. This finding is more than minor because it reasonably could be viewed as a precursor to a more significant event and adversely impacted the Initiating Events Cornerstone objective of limiting the likelihood of those events that upset plant stability and challenge critical safety functions during power operations. This finding challenged the availability and reliability of a mechanical RCS pressure boundary. This finding was evaluated using IMC 0609, Significance Determination Process, Attachment 04, Phase 1-lnitial Screening and Characterization of Findings, Table 4a, and determined to require further evaluation because the as-found leakage exceeded a TS RCS leakage limit. Based on Region I Senior Reactor Analyst (SRA) review, the finding was determined to be of very low safety significance (Green) since the maximum possible leak rate through the valve packing would be compensated by normal operation of the control rod drive system and the condensate/feedwater system. This finding has a cross-cutting aspect in the area of human performance, work control because NMPNS did not define and effectively communicate expectations regarding procedural compliance and personnel did not follow procedures during their inspection of the valve stem |
| Site: | Nine Mile Point  |
|---|---|
| Report | IR 05000220/2011005 Section 4OA3 |
| Date counted | Dec 31, 2011 (2011Q4) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | K Kolaczyk T Fish G Dentel J Brand N Perry E Keighley T Ziev B Fuller D Dempsey |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - Nine Mile Point - IR 05000220/2011005 | |||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Nine Mile Point) @ 2011Q4
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