05000400/FIN-2014007-01
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Finding | |
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Title | Failure to Establish Test That Verified Interlock Capability |
Description | The team identified a Green non-cited violation of 10 CFR Part 50, Appendix B, Criterion XI, "Test Control," for the licensees failure to establish a test program to assure that the interlocks between the Charging/Safety Injection (CSI) pump alternate miniflow block valves (1CS-745, -753) and the Residual Heat Removal (RHR) to CSI pump piggyback valves (1RH-25, -63) would perform satisfactorily in service. In response to this issue, the licensee initiated nuclear condition report 698720 and performed circuit testing of these control system interlocks during the inspection period to verify they remained operable. The licensee also verified that these interlocks had been subject to preoperational testing. The licensees failure to establish a test program to assure that the interlocks between the CSI pump alternate miniflow block valves (1CS-745, 1CS-753) and the RHR to CSI pump piggyback valves (1RH-25, 1RH-63) would perform satisfactorily in service, as required by 10 CFR Part 50, Appendix B, Criterion XI, was a performance deficiency. The performance deficiency was determined to be more than minor because, it was associated with the mitigating systems cornerstone attribute of design control and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the lack of testing affected the objective because there was no method to determine the capability of the interlocks to perform their function in the event of a postulated single failure during an accident, which could affect the high head safety injection function. The team determined the finding to be of very low safety significance (Green) because the finding was a deficiency affecting the design or qualification of a mitigating structure, system, or component (SSC), and the SSC maintained its operability. The team determined that no cross-cutting aspect was applicable because the finding was not indicative of current licensee performance. |
Site: | Harris |
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Report | IR 05000400/2014007 Section 1R21 |
Date counted | Sep 30, 2014 (2014Q3) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.21 |
Inspectors (proximate) | A Ruh C Baron G Ottenberg M Riley R Nease R Patterson S Kobylarz |
Violation of: | 10 CFR 50 Appendix B Criterion XI |
INPO aspect | |
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Finding - Harris - IR 05000400/2014007 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Harris) @ 2014Q3
Self-Identified List (Harris)
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