ML19238A288
| ML19238A288 | |
| Person / Time | |
|---|---|
| Issue date: | 09/25/2019 |
| From: | Geoffrey Miller Special Projects and Process Branch |
| To: | Michael Orenak Special Projects and Process Branch |
| Miller G | |
| References | |
| Download: ML19238A288 (3) | |
Text
September 25, 2019 MEMORANDUM TO: Michael D. Orenak, Acting Chief Special Projects and Process Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM: G. Edward Miller, Project Manager /RA/
Special Projects and Process Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF AUGUST 21, 2019, PUBLIC MEETING WITH NUCLEAR ENERGY INSTITUTE REGARDING PROBABILISTIC RISK ASSESSMENT CHANGE CONTROL PROCESS On August 21, 2019, the U.S. Nuclear Regulatory Commission (NRC) staff held a public meeting1 with industry representatives including staff from the Nuclear Energy Institute (NEI).
The purpose of the meeting was to discuss the process of acceptance of new methods for use in licensee probabilistic risk assessment (PRA) following approval of an amendment to implement, for example, a risk-informed completion time program. Specifically, the meeting discussed the necessary infrastructure (i.e., licensing and oversight) that needs to be established to develop a process to accept newly developed methods.
During the meeting, the NRC staff presented its assessment of discrete tasks that needed to be accomplished to establish the appropriate infrastructure.2 The NRC staff slides provided a status, remaining path forward, and challenges for short-term tasks and commitment to publish those tasks. Additionally, NEI provided an updated version of NEI 17-07,3 Performance of PRA Peer Reviews Using the ASME/ANS [American Society of Mechanical Engineers/American Nuclear Society] PRA Standard, that provided revisions in response to previously provided NRC staff comments. The NRC staff provided a list of comments on the revised version.4 In addition to the presentation, the NRC staff provided comments that the last paragraph of Section 2.4 was applicable to more than just fire events and, on page 20, give some examples of why walkdowns are important beyond confirming the analysis, by confirming, for example flood barriers, splash plates/guards, door heights, whether door are truly flood doors, etc. The NRC staff discussed its development of a memorandum that provides a summary of licensing and oversight strategies used in support of four risk-informed initiatives and plans to publish it as a knowledge management tool. Additionally, the NRC staff discussed longer term efforts to adapt the Reactor Oversight Program to inspect key attributes of PRAs, including newly 1 The original meeting notice is available in the Agencywide Documents Access and Management System (ADAMS) under Accession No. ML19207A443.
2 The NRC slides are available under ADAMS Accession No. ML19231A002.
3 The version of NEI 17-07 discussed at this meeting is available under ADAMS Accession No. ML19228A242.
4 The NRC staff additional comments are available in ADAMS under Accession No. ML19232A227.
M. Orenak developed methods in a performance-based risk-informed manner.5 The NRC staff also presented its plan to update Regulatory Guide 1.200, An Approach for Determining the Technical Adequacy of Probabilistic Risk Assessment Results for Risk-Informed Activities, and emphasized that its execution will significantly depend on the schedule of the planned update to the ASME/ANS PRA standard.6 During this presentation, there was general alignment that the NRC staff should move forward expeditiously with publication of RG 2.100, Revision 3 and not hold it pending the next edition of the PRA standard. Representatives from the Pressurized Water Reactor Owners Group (PWROG) gave a presentation summarizing industry activities and progress on this effort.7 No regulatory decisions were made, and it was agreed that another interaction on this topic should be planned when sufficient progress had been made on the tasks to warrant another meeting.
Following the discussion, an opportunity was afforded to any other participants who wished to ask questions or make comments. No comments were received.
Enclosure:
List of Attendees 5 The NRC staff slides are available under ADAMS Accession No. ML19231A470.
6 The NRC staff slides are available under ADAMS Accession No. ML19231A003.
7 The PWROG presentation slides are available under ADAMS Accession No. ML19233A167.
ML19238A288 *via e-mail OFFICE NRR/DORL/LSPB/PM NRR/DORL/LSPB/LA NRR/DRA/APLA/BC NAME GEMiller JBurkhardt (KGoldstein for) SRosenberg DATE 09/03/19 09/05/19 09/05/19 OFFICE NRR/DORL/LSPB/BC NRR/DORL/LSPB/PM NAME MOrenak GEMiller DATE 09/24/19 09/25/19