ML20009E155
| ML20009E155 | |
| Person / Time | |
|---|---|
| Issue date: | 01/09/2020 |
| From: | Stephen Cumblidge, Ali Rezai NRC/NRR/DNRL/NPHP |
| To: | |
| Rezai A, NRR-DNRL 415-1328 | |
| References | |
| Download: ML20009E155 (6) | |
Text
Coverage Relief Request Update Stephen Cumblidge 2020 Industry/NRC NDE Technical Information Exchange Public Meeting
2015 Presentation on Impractical Relief Requests In 2015 the NRC prepared a presentation that covered issues that commonly resulted in Requests for Additional Information (RAIs)
It can be found in ADAMS under Accession Number ML15013A266 2
What has changed since 2015?
The quality of impractical relief requests has improved substantially This improvement has resulted in fewer RAIs, but has not eliminated them Many RAIs are based on missing information or errors the submittal Some RAIs are related to issues that makes justifying reasonable assurance of leak tightness and structural integrity more challenging 3
Themes in RAIs Since 2015 Welds with low coverage may get extra scrutiny Some RAIs are in response to operating experience welds with new issues may get more questions Some RAIs address inconsistencies in submittals, such as including information on some welds but not others A review of recent RAIs did not find a strong common issue that resulted in many RAIs 4
What Information is Helpful?
Recent examples of RAIs have asked for the following additional information to help provide reasonable assurance in difficult cases:
A summary of the evaluation for accepting the proposed limited coverages required by ASME Code Case N716 Alternative Classification and Examination RequirementsSection XI A discussion of measures that could ensure or monitor the structural integrity of the subject welds, including the reactor coolant system leakage detection systems, routine system leakage tests in accordance with IWA/B5000 of the ASME Code,Section XI, boric acid monitoring programs, operator walkdowns, and any augmented examinations.
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Discussion What have we missed?
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