05000250/FIN-2011008-03
From kanterella
Jump to navigation
Jump to search
Finding | |
---|---|
Title | Failure to Maintain Adequate Records to Support Acceptance Criteria in Design Calculations |
Description | The team identified a NCV of 10 CFR Part 50, Appendix B, Criterion XVII, Quality Assurance Records, for the licensees failure to maintain sufficient records to furnish evidence of activities affecting quality. Specifically, the licensee was not able to retrieve test data and calculations supporting an acceptance criterion that assures the reliability and availability of minimum MCC voltage to provide adequate voltage to MCC control circuits. The licensee entered these issues into their corrective action program as AR 1676661 and has proposed actions to (1) implement a design modification to increase the control power transformer size for three motor operated valves (MOV), (2) add the control circuits for the 3 MOVs to the sites low margin list, and (3) re-create missing analysis and test data. The inspectors determined that the failure to have retrievable test data and calculations to support acceptance criteria for MCC control circuit voltage was a performance deficiency. The finding was more than minor because it affected the Mitigating Systems Cornerstone attribute of Design Control, and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, there was reasonable doubt as to whether safety-related MCC control circuits would have sufficient voltage to function during a degraded voltage condition. The finding was considered to be of very low safety significance (Green) since this was a design deficiency confirmed not to have resulted in a loss of operability or functionality. The team determined that no cross cutting aspect was applicable to this performance deficiency because this finding was not indicative of current licensee performance |
Site: | Turkey Point |
---|---|
Report | IR 05000250/2011008 Section 1R21 |
Date counted | Sep 30, 2011 (2011Q3) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.21 |
Inspectors (proximate) | D Jones G Skinner D Mas-Penaranda M Yeminy R Patterson B Desai E Stamm D Terri-Ward |
INPO aspect | |
' | |
Finding - Turkey Point - IR 05000250/2011008 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Turkey Point) @ 2011Q3
Self-Identified List (Turkey Point)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||