05000250/FIN-2011008-06
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Finding | |
|---|---|
| Title | Failure to Test the SBO Cross-Tie under Loaded Conditions |
| Description | The team identified a NCV of 10 CFR 50.63 for the licensees failure to test the station blackout (SBO) cross-tie components under loaded conditions. Since 1991, the licensee failed to verify the capability of the SBO cross-tie and associated components to carry the required amperage during post installation tests or subsequent periodic maintenance tests. The licensee entered these issues into their corrective action program as ARs 1676402 and 1680428 with an action to establish a method and frequency for loading the SBO cross-tie components. The team determined that the licensees failure to perform adequate post installation testing and periodic testing as required by the licensees commitment to RG 1.155, Station Blackout, was a performance deficiency. This finding was more than minor because it affected the Mitigating Systems cornerstone attribute of Equipment Performance and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems and components that respond to initiating events to preclude undesirable consequences (i.e. core damage). Specifically, since the installation of cross-tie components to meet SBO requirements, the licensee failed to test the components in a loaded condition. The lack of testing resulted in a reduced reliability of the SBO cross-tie. In accordance with NRC IMC 0609.04, Initial Screening and Characterization of Findings, the team conducted a Phase 1 SDP screening and determined the finding to be of very low safety significance (Green) because it was not a design issue resulting in loss of function, did not represent an actual loss of a system safety function, did not result in exceeding a TS allowed outage time, and did not affect external event mitigation. 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 | |
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Finding - Turkey Point - IR 05000250/2011008 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Turkey Point) @ 2011Q3
Self-Identified List (Turkey Point)
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