05000454/FIN-2013005-02
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Finding | |
|---|---|
| Title | Intake Structure Silt Level Acceptance Criteria Were Non-Conservative |
| Description | The inspectors identified a finding of very low safety significance and an associated NCV of 10 CFR 50, Appendix B, Criterion III, ?Design Control,? when licensee personnel failed to develop appropriate intake structure silt level acceptance criteria. Specifically, the licensee used a non-conservative river water low level value as an input when developing silt level acceptance criteria. The licensee entered this issue into their CAP as IR 1582385, ?Input Used in BYR 96-277 is Not Conservative,? and planned to correct the acceptance criteria and revise the affected surveillance procedures. The performance deficiency was determined to be more than minor because it was associated with the Equipment Performance attribute of the Mitigating Systems cornerstone and adversely affected the cornerstone objective of ensuring the availability, 4 reliability, and capability of systems to respond to initiating events to prevent undesirable consequences (i.e. core damage). The finding screened as having very low safety significance because it did not result in a loss of operability or functionality. Specifically, a historical review did not find an example where the as-found silt level resulted in an inoperable condition. The inspectors did not identify a cross-cutting aspect associated with this finding because it was confirmed not to reflect current performance due to the age of the performance deficiency. |
| Site: | Byron  |
|---|---|
| Report | IR 05000454/2013005 Section 1R07 |
| Date counted | Dec 31, 2013 (2013Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.07 |
| Inspectors (proximate) | C Thompson D Jones E Duncan J Cassidy J Laughlin J Mcghee J Robbins M Holmberg M Jones N Feliz Adorno R Ng S Sheldon B Bartlett B Palagi |
| Violation of: | 10 CFR 50 Appendix B Criterion III, Design Control |
| INPO aspect | |
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Finding - Byron - IR 05000454/2013005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2013Q4
Self-Identified List (Byron)
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