05000354/FIN-2016001-02
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | In Modes 1, 2, and 3, Hope Creek TS 3.4.2.1, "Safety Relief Valves," requires that 13 of the 14 SRVs open within of +/- 3 percent of the specified code safety valve function lift settings or else be in Mode 3 within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in Mode 4 within the next 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Contrary to this requirement, on June 2, 2015, PSEG identified that two or more SRVs had as-found set points in excess of the TS allowable tolerance. Subsequent testing revealed that 10 of 14 SRVs lifted above the TS specified pressure band, thus leaving 4 operable SRVs. PSEG entered this issue into their CAP as NOTF 20692390. PSEG corrective actions included replacing the pilot assembly for each of the 14 SRVs with a fully tested spare assembly, and evaluating options to replace the currently installed SRVs with a new design that eliminates set point drift events. The inoperability of the 10 SRVs did not result in a loss of system safety function based on engineering analyses that showed that the SRVs would have functioned to prevent a reactor vessel over-pressurization and that postulated piping stresses would not exceed allowable limits. The inspectors independently reviewed PSEGs associated technical evaluations and determined that PSEG used adequate engineering rigor and conservatively bounded the condition. The inspectors determined that this finding is of very low (Green) safety significance based on a SDP issue screening, because the SRVs would have functioned to prevent a reactor vessel over-pressurization (no loss of safety function). The closure of the LER associated with this event was documented in Section 4OA3.1. |
| Site: | Hope Creek  |
|---|---|
| Report | IR 05000354/2016001 Section 4OA7 |
| Date counted | Mar 31, 2016 (2016Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | F Bower J Hawkins J Schoppy S Haney G Dipaolo |
| Violation of: | Technical Specification |
| INPO aspect | |
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Finding - Hope Creek - IR 05000354/2016001 | |||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Hope Creek) @ 2016Q1
Self-Identified List (Hope Creek)
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