Finding | |
|---|---|
| Title | Inboard Main Steam Isolation Valve Closure Time Test Acceptance Criteria Did Not Account for the Design Basis Accident Containment Back Pressure and Pneumatic Supply Operating Pressure |
| Description | The inspectors identified a Green finding and an associated NCV of Title 10 of the Code of Federal Regulations(CFR), Part 50, Appendix B, Criterion XI, Test Control, for the failure to assure that applicable requirements and acceptance limits contained in the inboard main steam isolation valve (MSIV) design documents were incorporated into their test procedure. Specifically, the inboard MSIV closure time acceptance criteria contained in Functional Test Procedure 0255-07-IA-2, Main Steam Isolation Valve Functional Checks Test, did not account for the elevated containment pressure and the expected lower pneumatic supply pressure expected during design basis accidents. |
| Site: | Monticello  |
|---|---|
| Report | IR 05000263/2018012 Section 1R21 |
| Date counted | Sep 30, 2018 (2018Q3) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21M |
| Inspectors (proximate) | J Benjamin A Dahbur J Park M Jones W Hopf C Baron K Stoedter |
| Violation of: | 10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion XI |
| INPO aspect | |
| ' | |
Finding - Monticello - IR 05000263/2018012 | ||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Monticello) @ 2018Q3
Self-Identified List (Monticello)
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