05000456/FIN-2011002-05
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | A finding of very low safety significance (Green) and associated Non-Cited Violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, was identified by the licensee for the failure to ensure that the ECCS mode of operation of RHR would be capable of performing its mitigating function at Mode 4 following RHR realignment from its DHR mode of operation. Specifically, the operability requirements of RHR in Mode 4 defined by TS 3.5.3 were not translated into applicable procedures or specifications of the system in that neither the procedures nor design prevented the conditions that would lead to steam void formation during a LOCA that initiates at this Mode resulting in steam binding of the system pumps and/or an adverse waterhammer. The performance deficiency was determined to be more than minor because it was associated with the Mitigating Systems cornerstone attribute of Equipment Performance and affected the cornerstone objective of ensuring the capability of systems that respond to initiating events to prevent undesirable consequences. An SDP Phase II evaluation concluded that the finding was of very low safety significance. The licensee entered this concern in its CAP as IR 1073616. |
| Site: | Braidwood  |
|---|---|
| Report | IR 05000456/2011002 Section 4OA7 |
| Date counted | Mar 31, 2011 (2011Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | D Betancourt E Duncan J Benjamin J Gall J Gilliam M Holmberg M Perry M Thorpe Kavanaugh N Feliz Adorno R Jicklin |
| INPO aspect | |
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Finding - Braidwood - IR 05000456/2011002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2011Q1
Self-Identified List (Braidwood)
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