ML23114A257
| ML23114A257 | |
| Person / Time | |
|---|---|
| Site: | Electric Power Research Institute |
| Issue date: | 05/05/2023 |
| From: | Lois James Licensing Processes Branch |
| To: | Gerond George Licensing Processes Branch |
| Shared Package | |
| ML23117A299 | List: |
| References | |
| EPID L-2021-TOP-0006 | |
| Download: ML23114A257 (1) | |
Text
May 5, 2023 MEMORANDUM TO:
Gerond A. George, Chief Licensing Projects Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM:
Lois M. James, Senior Project Manager
/RA/
Licensing Projects Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF MEETING BETWEEN U.S. NUCLEAR COMMISSION AND ELECTRIC POWER RESEARCH INSTITUTE TO DISCUSS SUPPLEMENT TO REQUEST FOR ADDITIONAL INFORMATION #14 RESPONSE FOR THE REVIEW OF EPRI REPORT 3002018337, USE OF DATA VALIDATION AND RECONCILIATION METHODS FOR MEASUREMENT UNCERTAINTY RECAPTURE: TOPICAL REPORT (EPID NO. L-2021-TOP-0006)
On April 24, 2023, the U.S. Nuclear Commission (NRC) staff met with Electric Power Research Institute (EPRI) representatives to discuss a supplement to Request for Additional Information (RAI) #14 response associated with the review of EPRI Report 3002018337, Use of Data Validation and Reconciliation [(DVR)] Methods for Measurement Uncertainty Recapture
[(MUR)]: Topical Report (DVR Methods for MUR). The list of attendees is enclosed.
This was an observation, virtual meeting, in which attendees had an opportunity to observe the NRC performing its regulatory function or discussing regulatory issues. Attendees had an opportunity to ask questions of the NRC staff or make comments about the issues discussed following the business portion of the meeting; however, the NRC was not actively soliciting comments toward regulatory decisions at this meeting.
The purpose of the meeting was to discuss the supplemental information provided by EPRI for RAI #14 response associated with the review of DVR Methods for MUR. The meeting began at 3:00 pm and ended 4:00 pm. There were four NRC staff members, four EPRI representatives and contractors, and no members of the public. The meeting began with introductions of the NRC staff and EPRI representatives.
CONTACT: Lois M. James, NRR/DORL 301-415-3306
During the meeting, the NRC staff and EPRI representatives discussed the supplemental response to RAI #14 recently provided to the NRC. The NRC staff stated that they did not believe the staffs draft safety evaluation (SE) would need to be significantly revised as a result of the new EPRI information provided but stated that they would likely modify some of the text in the final version of the SE to better address EPRIs supplemental response. The NRC staff also noted that some of the material provided was focused on the statistical representation of the uncertainty associated with the measurement inputs to be used with the DVR process. While the NRC staff identified acceptance criteria associated with those uncertainty inputs in the SE, the NRC staff did not address the mechanics as to how those inputs should be introduced into the DVR process. The EPRI representatives stated that the DVR process they used is initiated with default uncertainty values which are to be updated with more realistic values by the licensee during the plant model tuning process.
The NRC staff noted that the generation of measurement uncertainty inputs using appropriate instrument channel modeling and industry consensus standard methods was considered a necessary and important aspect of the application of the DVR method and would be expected to be addressed in a license amendment request (LAR) which requested approval for the use of the DVR method. However, the NRC staff is confident that acceptable uncertainty input values could be generated as the NRC and the industry have agreed on the acceptability of similar input values for other methods (e.g., inputs used to calculate the core thermal power uncertainty).
The next step is for the NRC staff to complete the staffs draft SE concurrence process and to prepare for an upcoming presentation to the Advisory Committee on Reactor Safeguards (ACRS) Subcommittee regarding the staffs evaluation of the EPRI Topical Report.
If you have any questions or comments, please contact me via e-mail at Lois.James@nrc.gov.
Docket No. 99902021
Enclosure:
List of Attendees
Enclosure U.S. Nuclear Regulatory Commission Public Meeting - Attendees List May 24, 2023
Title:
Meeting Between the U.S. Nuclear Regulatory Commission (NRC) and the Electric Power Research Institute (EPRI) to Discuss a Supplement to Request for Additional Information #14 Response Associated with the Review of EPRI Report 3002018337, Use of Data Validation and Reconciliation Methods for Measurement Uncertainty Recapture: Topical Report Name EPRI Participants Kurtis Crytzer EPRI Industry Participants Name Affiliation Greg Kanuckel GSE-TruNorth Silas Rogers GSE-TruNorth Kevin Tully GSE-TruNorth Name NRC Participants Gerond George NRC Lois James NRC Joshua Kaizer NRC Scott Krepel NRC David Rahn NRC
ML23117A299 (Package)
ML23114A257 (Memorandum)
ML23103A396 (Meeting Notice)
ML23103A151 (EPRI Response 1)
ML23103A152 (EPRI Response 2)
- via eConcurrence NRR-106 OFFICE NRR/DORL/LLPB/PM*
NRR/DORL/LLPB/LA*
NRR/DSS/SNFB/BC*
NAME LJames DHarrison SKrepel DATE 05/02/2023 05/02/2023 05/03/2023 OFFICE NRR/DORL/LLPB/BC*
NRR/DORL/LLPB/PM*
NAME GGeorge LJames DATE 05/04/2023 05/05/2023