05000443/FIN-2012005-03
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Seabrook technical specification surveillance requirement 4.3.1.2, Reactor Trip System Instrumentation, requires that the reactor trip system features response time for each reactor trip function listed in Table 3.3-1 be verified to be within its limit at least once per 18 months. On September 25, 2012, NextEra identified that the full scope of response time testing for the reactor trip system function had not been completed since initial licensing because the implementing procedure did not verify the response time for both reactor trip methods. Testing had been completed on the under-voltage circuit, but no testing had been performed on the shunt trip circuit. The issue was determined to be a violation of Seabrook TS 6.7, Procedures and Programs, which requires that written procedures be established, implemented and maintained as recommended in RG 1.33, Revision 2, Appendix A, February 1978. RG 1.33, Appendix A, requires implementing procedures for each SR listed in TSs. Contrary to this requirement, since initial licensing, NextEras procedure for implementing TS SR 4.3.1.2 did not test the response time for reactor trip breaker function at least once per 18 months, which resulted in a violation of TS 3.1.2, Reactor Trip System Instrumentation, as described in LER 05000443/2012-002-00. The finding was associated with the Mitigating Systems cornerstone and was evaluated for significance using Exhibit 2 of IMC 0609, Appendix A. Since the finding was not a design or qualification deficiency, did not result in a loss of system safety function, did not result in loss of a single train for greater than its allowed outage time, and was not potentially risk significant due to external events, the finding was determined to be of very low safety significance (Green). The issue was entered into NextEras CAP as CR 1806525. |
| Site: | Seabrook  |
|---|---|
| Report | IR 05000443/2012005 Section 4OA7 |
| Date counted | Dec 31, 2012 (2012Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | D Silk D Schroeder C Newport S Rich B Dionne M Jennerich |
| INPO aspect | |
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Finding - Seabrook - IR 05000443/2012005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Seabrook) @ 2012Q4
Self-Identified List (Seabrook)
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