05000373/FIN-2010003-01
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Finding | |
|---|---|
| Title | Failure to develop and implement an adequate surveillance test procedure to accurately assess the as-found trip setpoint for the pressure switches associated with the main steam line low pressure isolation function and carious other safety-related functions. |
| Description | The inspectors identified a finding of very low significance and a NCV of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures and Drawings, for the licensees failure to develop and implement an adequate surveillance test procedure to accurately assess the as-found trip setpoint for the pressure switches associated with various safety-related functions including but not limited to the main steam line low pressure isolation function. Specifically, the testing methodology incorporated in the surveillance procedures utilized by the licensee to determine the reset and as-found trip setpoints data unacceptably preconditioned the pressure switches prior to obtaining the required test data. The licensee entered this issue into their corrective action program (CAP). The inspectors identified no cross-cutting aspects associated with this finding. The inspectors determined that the performance deficiency was more than minor and a finding because it impacted the Reactor Safety Mitigating Systems Cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors evaluated the finding using IMC 0609, Appendix A, Attachment 1, Significance Determination of Reactor Inspection Findings for At-Power Situations, using the Phase 1 Worksheet for the Mitigating Systems Cornerstone. The inspectors answered all of the Exhibit 1, Table 4a Mitigating Systems questions no, therefore, the inspectors concluded that the finding was of very low safety significance. |
| Site: | LaSalle  |
|---|---|
| Report | IR 05000373/2010003 Section 1R15 |
| Date counted | Jun 30, 2010 (2010Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | G Roach F Ramirez K Riemer M Mitchell C Phillips J Yesinowski J Draper A Scarbeary P Smagacz |
| INPO aspect | |
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Finding - LaSalle - IR 05000373/2010003 | |||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (LaSalle) @ 2010Q2
Self-Identified List (LaSalle)
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