ML19101A292
| ML19101A292 | |
| Person / Time | |
|---|---|
| Issue date: | 04/18/2019 |
| From: | Frederick Brown Office of New Reactors |
| To: | Riccardella P Advisory Committee on Reactor Safeguards |
| Hoellman J, NRC/DAR/ARPB, 415-5481 | |
| Shared Package | |
| ML19079A269 | List: |
| References | |
| LTR-19-0104-1 | |
| Download: ML19101A292 (3) | |
Text
April 18, 2019 Dr. Peter C. Riccardella, Chairman Advisory Committee on Reactor Safeguards U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
SUBJECT:
RESPONSE TO THE ADVISORY COMMITTEE ON REACTOR SAFEGUARDS LETTER REGARDING DRAFT SECY PAPER AND GUIDANCE DOCUMENTS TO IMPLEMENT A TECHNOLOGY-INCLUSIVE, RISK-INFORMED, AND PERFORMANCE-BASED APPROACH TO INFORM THE CONTENTS OF APPLICATIONS FOR LICENSES, CERTIFICATIONS, AND APPROVALS FOR NON-LIGHT-WATER REACTORS
Dear Dr. Riccardella:
I am responding to your letter dated March 19, 2019 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML19078A240), in which the Advisory Committee on Reactor Safeguards (ACRS) provided its findings and recommendations concerning the U.S. Nuclear Regulatory Commission draft SECY paper, Technology-Inclusive, Risk-Informed, and Performance-Based Approach to Inform the Content of Applications for Licenses, Certifications, and Approvals for Non-Light-Water Reactors (ADAMS Accession No. ML18270A334), and the associated draft Regulatory Guide DG-1353 (ADAMS Accession No. ML18271A164).
In its letter, the Committee provided several conclusions and a recommendation. The Committee concluded that the staffs paper proposes an approach, which has matured to the point of being ready for application, to accomplish three objectives: (1) to select licensing basis events, (2) to classify structures, systems, and components, and (3) to access the adequacy of defense-in-depth for new designs. Additionally, the Committee concluded that the guidance proposed in DG-1353 is adequate to support implementation of the approach described in the SECY paper, with the exception that guidance for developing mechanistic source terms should be expanded.
The Committee recommended that the Commission adopt the approach proposed by the staff for a technology-inclusive, risk-informed, and performance-based methodology for informing the licensing basis and content of applications for non-light-water reactors.
The staff appreciates the Committees review and feedback, as well as the thoughtful discourse during the June 22 and October 30, 2018, Future Plant Designs Subcommittee and February 6-8, 2019, ACRS Full Committee meetings. The staff notes that there are on-going efforts for developing mechanistic source term guidance and we will engage the ACRS on this topic in the future.
P. Riccardella 2 The staff plans to publish DG-1353 for comment, and then interact with the ACRS prior to issuance of the final regulatory guide. The staff looks forward to further interaction with the Committee on other upcoming advanced non-light-water reactor topics.
Sincerely,
/RA/
Frederick D. Brown, Director Office of New Reactors cc: Chairman Svinicki Commissioner Baran Commissioner Burns Commissioner Caputo Commissioner Wright SECY
P. Riccardella 3
SUBJECT:
RESPONSE TO THE ADVISORY COMMITTEE ON REACTOR SAFEGUARDS LETTER REGARDING DRAFT SECY PAPER AND GUIDANCE DOCUMENTS TO IMPLEMENT A TECHNOLOGY-INCLUSIVE, RISK-INFORMED, AND PERFORMANCE-BASED APPROACH TO INFORM THE CONTENTS OF APPLICATIONS FOR LICENSES, CERTIFICATIONS, AND APPROVALS FOR NON-LIGHT-WATER REACTORS DATED April 18, 2019 DISTRIBUTION: LTR-19-0104-1 PUBLIC JHoellman, NRO WReckley, NRO ACubbage, NRO JSegala, NRO JMonninger, NRO RidsAcrsAncw_MailCTR Resource RidsNroMailCenter Resource RidsNroOd Resource RidsOcaMailCenter RidsOpaMailCenter RidsSecyMailCenter ADAMS Accession Number: ML19079A269 Pkg *via email NRO-002 OFFICE NRO/DSRA NRO/DSRA TechEditor NAME JHoellman* WReckley* JDougherty*
DATE 4/15/19 4/8/19 4/11/19 OFFICE NRO/DSRA NRO/DSRA NRO NAME JSegala (GTartal for)* JMonninger* FBrown DATE 4/15/19 4/11/19 4/18/19 OFFICIAL RECORD COPY