05000269/FIN-2011017-02
From kanterella
Jump to navigation
Jump to search
Finding | |
---|---|
Title | Failure to Maintain SSF Pressurizer Heater Breakers as Safety-Related Components |
Description | An NRC-identified potentially greater than Green apparent violation of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was identified when the licensee failed to perform an adequate operability evaluation for the Standby Shutdown Facility Auxiliary Service Water subsystem in accordance with NSD 203, Operability/Functionality. The failure to perform an adequate operability evaluation for the SSF ASW subsystem was a performance deficiency. The PD was considered more than minor because it was associated with the Design Control attribute of the Mitigating System Cornerstone and adversely affected the cornerstone objective in that the licensee failed to assure the SSF pressurizer heater breakers would function under expected environmental conditions before declaring the SSF operable but degraded/nonconforming. A Phase III analysis was required because the finding involved the loss or degradation of equipment designed to mitigate external initiating events. The PD was related to the cross-cutting aspect of using conservative assumptions in the Decision-Making component of the Human Performance cross-cutting area in that the licensee declared the SSF OBDN without validated testing to demonstrate the SSF pressurizer heater breakers would function under design basis conditions. |
Site: | Oconee |
---|---|
Report | IR 05000269/2011017 Section 4OA5 |
Date counted | Sep 30, 2011 (2011Q3) |
Type: | Other: |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 93812 |
Inspectors (proximate) | B Parks G Hutto J Austin K Ellis M Riches S Walkera Sabischr Bernhard R Croteau |
CCA | H.14, Conservative Bias |
INPO aspect | DM.2 |
' | |
Finding - Oconee - IR 05000269/2011017 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Oconee) @ 2011Q3
Self-Identified List (Oconee)
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||