ML030840372
| ML030840372 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 03/20/2003 |
| From: | Office of Nuclear Regulatory Research |
| To: | |
| References | |
| FOIA/PA-2003-0018 | |
| Download: ML030840372 (1) | |
Text
3.4.2 The NRC failed to Provide Adequate Reactor Oversight Process Guidance The LLTF found that the staff was having difficulty characterizing the significance of the avis Besse event. This difficulty appeared to stem from technical limitations of risk assessments and SDPs in that pressure boundary integrity does not appear to be treated explicitly in PRAs. As a result, the type and extent of wastage of the RCS pressure boundary encountered at Davis-Besse appeared to be more within the scope of traditional deterministic analyses than in a risk-informed framework. In fact, as of the time of the LLTF review, the SDP for this event had been in progress for 5 months, with no resolution. Members of the NRC staff expressed the opinion that, in the transition to the ROP, the agency has placed an over-reliance on risk information as opposed to deterministic methods.