05000348/FIN-2016007-01
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Finding | |
|---|---|
| Title | Failure to Verify Design Assumptions Associated With the Operation of the Atmospheric Relief Valves (ARVs) |
| Description | The NRC identified a non-cited violation (NCV) of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for failure to verify design assumptions associated with the operation of the atmospheric relief valves (ARVs) following a steam generator tube rupture (SGTR). The licensee failed to verify that all credited methods of ARV operation as specified in procedure FNP-1-EEP-3, Steam Generator Tube Rupture, Rev. 27 could be performed within the FSAR specified time limit of 30 minutes. Upon identification of the issue, the licensee initiated Technical Evaluation 952125 and conducted two simulated scenarios using the two credited means of operating the ARVs following a SGTR. The licensee was able to show that the actions could be performed within the specified time, although the time results were marginal and did not account for operator error or repeatability. This issue has been entered into the licensees corrective action program as CR 10193323. The performance deficiency was more than minor because it was associated with the Design Control attribute of the Mitigating Systems Cornerstone and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The finding was not greater than green because it affected the design or qualification of a mitigating structure, system, or component (SSC), but the SSC maintained its operability or functionality as documented in CR 10193323. This finding was not assigned a cross-cutting aspect because the issue did not reflect current licensee performance. |
| Site: | Farley  |
|---|---|
| Report | IR 05000348/2016007 Section 1R17 |
| Date counted | Mar 31, 2016 (2016Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.17 |
| Inspectors (proximate) | J Bartley R Patterson S Herrick T Su |
| Violation of: | 10 CFR 50 Appendix B Criterion III, Design Control |
| INPO aspect | |
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Finding - Farley - IR 05000348/2016007 | |||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Farley) @ 2016Q1
Self-Identified List (Farley)
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