05000390/FIN-2009003-01
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Finding | |
|---|---|
| Title | Failure to Adequately Implement Procedures to Maintain the Design of the Intake Pumping Station Missile Shield |
| Description | The NRC identified a Green, non-cited violation (NCV) of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, for the licensees failure to adequately implement work order instructions to maintain the integrity of the intake pumping station (IPS) missile shield, as designed. The inspectors determined the licensees failure adequately implement work order instructions to maintain the integrity of the IPS missile shield was a performance deficiency. The failure to assure adequate tornado missile protection had a credible impact on reactor safety because of the potential exposure of both trains of the ERCW system to tornado induced damage. The inspectors reviewed Inspection Manual Chapter (IMC) 0612 and determined that the finding is more than minor because the finding was associated with the design control and protection against external events attributes of the Mitigating Systems cornerstone and adversely affected the cornerstone objective of ensuring the reliability and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors evaluated this finding using IMC 0609, Significance Determination Process, and determined that it was of very low safety significance (Green) given that the safety function of the ERCW system was not assumed to be completely failed or unavailable due to a severe weather initiating event. The finding directly involved the cross-cutting area of human performance under the procedural compliance aspect of the work practices component, in that, the work order instructions for restoration of the IPS missile shield after maintenance were not followed and the reliability and capability of the IPS missile shield was affected. (H.4.b). (Section 4OA2.2 |
| Site: | Watts Bar  |
|---|---|
| Report | IR 05000390/2009003 Section 4OA2 |
| Date counted | Jun 30, 2009 (2009Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | R Monk E Guthrie P Higgins M Pribish |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - Watts Bar - IR 05000390/2009003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Watts Bar) @ 2009Q2
Self-Identified List (Watts Bar)
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