05000313/FIN-2009004-01
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Finding | |
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| Title | Failure to Adequately Monitor the Performance of Station High Energy Line Break Door Latches |
| Description | The inspectors documented a self-revealing noncited violation of 10 CFR 50.65(a)(2) associated with the licensees failure to appropriately monitor station high energy line break doors, which are scoped into their Maintenance Rule Program, in a manner that provided reasonable assurance that these doors were capable of fulfilling their safety function. Specifically, the licensee had no maintenance task or inspection activity to check for degradation of the latching mechanism of station high energy line break doors. The failure of these doors would result in the removal of a hazard barrier that could have an adverse impact on equipment necessary to mitigate the consequences of a high energy line break event. The licensee entered this issue into their corrective action program as Condition Report ANO-1-2009-0425. The performance deficiency was more than minor because it affected the equipment performance attribute of the Mitigating Systems Cornerstone and directly affected the cornerstone objective of ensuring the availability, reliability and capability of systems that respond to initiating events to prevent undesirable consequences, and is therefore a finding. Using Inspection Manual Chapter 0609, Significance Determination Process, Phase 1 Worksheets, this finding was determined to have a very low safety significance because the finding (1) is a design or qualification issue confirmed not to result in a loss of operability or functionality; (2) did not represent an actual loss of safety function of the system or train; (3) did not result in the loss of one or more trains of nontechnical specification equipment; and (4) did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. The finding did not have a crosscutting aspect because the cause of the performance deficiency is not indicative of current plant performance as high energy line break doors were scoped into the Maintenance Rule Program in the 1990s. |
| Site: | Arkansas Nuclear  |
|---|---|
| Report | IR 05000313/2009004 Section 1R12 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | C Graves T Mckernon A Sanchez J Josey J Clark B Larson M Bloodgood T Pate S Hedger J Rotton |
| INPO aspect | |
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Finding - Arkansas Nuclear - IR 05000313/2009004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Arkansas Nuclear) @ 2009Q3
Self-Identified List (Arkansas Nuclear)
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