ML18137A173
| ML18137A173 | |
| Person / Time | |
|---|---|
| Issue date: | 07/23/2018 |
| From: | Stephen Cumblidge NRC/NRR/DMLR/MPHB |
| To: | Steve Ruffin NRC/NRR/DMLR/MPHB |
| Cumblidge S, NRR-DMLR 415-2823 | |
| Shared Package | |
| ML18137A170 | List: |
| References | |
| Download: ML18137A173 (4) | |
Text
Risk-Informed InserviceInspectionSection XI, Appendix RApril 17, 2018 Original Risk
-Informed Application In-service Inspection: RG 1.178 EPRI method based code case, including PRA quality, approved -could simply be made part of Appendix RWCAP method based code case review abandoned All issues that caused WCAP method code case review to be abandoned must be revived and resolved.Rather then repeating EPRI method review, better to simply complete WCAP code case review then combine in Appendix RCompleting WCAP code case review may require re
-visiting entire methodology Risk-Informed In
-service InspectionsWCAP methodology needs some clarificationAll degradation mechanism in one weld versus every weld calculatedBetter definition of a segment Crediting of non
-ISI inspections as ISI inspections (e.g., FAQ)Overwhelming of relative importance measures with a few very high estimated risk welds.Quality of the PRA when using the relative importance measuresOther?
Risk-Informed In
-service InspectionsWCAP methodology needs some clarificationPFM calculations used to estimate frequency for importance measures and for change in riskApplicability of newer PFM calculationsConsistency with other applications that use PFMOther?