Finding | |
|---|---|
| Title | Inadequate Test Control of ECCS Valve Interlocks |
| Description | The team identified a finding of very low safety significance (Green) involving an NCV of 10 CFR Part 50, Appendix B, Criterion XI, Test Control. Specifically, Dominion did not ensure that all testing required to demonstrate that emergency core cooling system (ECCS) valve interlock circuits would perform satisfactorily was being performed. The team determined that certain interlocks associated with ECCS valve 3SIL*MV8804A control circuit were not properly tested to demonstrate that the valve would not open if interlocks had not been met or would open, when required, with minimum interlock requirements met during design basis accidents. |
| Site: | Millstone  |
|---|---|
| Report | IR 05000423/2018010 Section 1R21 |
| Date counted | Jun 30, 2018 (2018Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21M |
| Inspectors (proximate) | K Mangan M Patel J Brand J Rady C Lally C Baron J Nicely M Gray |
| Violation of: | 10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion XI |
| INPO aspect | |
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Finding - Millstone - IR 05000423/2018010 | |||||||||||||||||||||||||||||||||||||||||
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Finding List (Millstone) @ 2018Q2
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