05000331/FIN-2017007-01
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Finding | |
|---|---|
| Title | Failure to Include Valves in the Inservice Testing (IST) Program |
| Description | Green . The inspectors identified a finding and an associated non- cited violation of Title 10 of the Code of Federal Regulations (10 CFR ) 50.55a(f)(1) for the licensees failure to scope in multiple check valves of the main steam isolation valve leakage treatment system (LTS) into the Inservice Testing (IST) Program. Specifically, these valves were credited to mitigate the consequences of the main steam isolation valve leakage following a loss of coolant accident but they were not scoped into the IST program. Since the licensee made a commitment to the NRC to put these valves into the IST p rogram as part of License Amendment 207, this issue is also a Deviation in accordance with the NRC Enforcement Policy. The licensee put this issue into the CAP 3 as Action Requests ( AR s) 2193481 and 2193482 and planned to include these v alves in the full IST program . This performance deficiency was m ore than minor because i f left uncorrected, there was a potential to lead to a more significant safety concern. Specifically, th ese valves that were credited to mitigate the consequence of an accident were not tested in accordance with the IST program. T he finding screened as very low safety significance (Green) because it did not represent an actual open pathway in the physical integrity of reactor containment , containment isolation system , and heat removal components , nor did it involve an actual reduct ion in function of hydrogen igniters in the reactor containment . The inspectors determined this finding affected the cross -cutting area of problem identification and resolution in the aspect of evaluation because the licensee justified that the valves be put into the augmented IST program since they were non- code components . In addition, the licensee did not re -scope these components into the IST program when 10 CFR 50.55(f)(1) was changed in 1999. This misconception continued when the licensee discovered several valves of the LTS were not in the IST program scope in 2015 . [P.2] |
| Site: | Duane Arnold  |
|---|---|
| Report | IR 05000331/2017007 Section 4OA2 |
| Date counted | Jun 30, 2017 (2017Q2) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | A Dunlop C Phillips K Stoedter M Jones R Ng |
| Violation of: | 10 CFR 50.55 |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Duane Arnold - IR 05000331/2017007 | |||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Duane Arnold) @ 2017Q2
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