ML23089A005
| ML23089A005 | |
| Person / Time | |
|---|---|
| Site: | 99902078 |
| Issue date: | 03/30/2023 |
| From: | Alina Schiller NRC/NRR/DNRL/NRLB |
| To: | Michael Dudek NRC/NRR/DNRL/NRLB |
| References | |
| Download: ML23089A005 (6) | |
Text
March 30, 2023 MEMORANDUM TO:
Michael I. Dudek, Chief New Reactor Licensing Branch Division of New and Renewed Licenses Office of Nuclear Reactor Regulation FROM:
Alina Schiller, Project Manager
/RA/
New Reactor Licensing Branch Division of New and Renewed Licenses Office of Nuclear Reactor Regulation
SUBJECT:
U.S. NUCLEAR REGULATORY COMMISSION
SUMMARY
OF THE MARCH 21, 2023, OBSERVATION PUBLIC MEETING TO DISCUSS NUSCALE POWER, LLCS PLAN FOR TOPICAL REPORT ON MITIGATION STRATEGIES FOR DESIGN-RELATED PORTIONS OF TITLE 10 CODE OF FEDERAL REGULATIONS CFR 50.155 The U.S. Nuclear Regulatory Commission (NRC) conducted a virtual observation public meeting/teleconference on March 21, 2023. The purpose of this meeting was for NuScale Power, LLCs (NuScale) to present its plan for the topical report on mitigation strategies for design-related portions of the Title 10 of Code of Federal Regulations (10 CFR) Part 50.155, Mitigation of Beyond-Design-Basis Events.
The public meeting notice was posted on the NRC public website on December 12, 2022, and can be found under Agencywide Documents Access and Management System (ADAMS)
Accession No. ML23079A248. NuScales presentation materials for this public meeting can be found under ML23076A124 (Non-proprietary) and ML23076A131 (Proprietary). The enclosure to this memorandum provides a list of the meeting participants.
During the open portion of the meeting, NuScale stated its intent to submit a licensing topical report on this topic and provided a description of its approach for the NuScale power plant to demonstrate compliance with the design-related portions of 10 CFR 50.155, including a discussion on the general design features of the NuScale power plant. NuScale stated these general design features allow for a broad range of NuScale power plant designs, including the recently submitted US460 standard design approval application. NuScale also introduced the topics that would be presented during the closed portion of the meeting.
CONTACT:
Alina Schiller, NRR/DNRL, 301-415-8177
M. Dudek 2
NuScale provided a short summary of the following design features:
Small modular integral pressurized light-water reactors.
Operating reactor modules partially immersed in water that serves as the ultimate heat sink (UHS).
UHS retained below grade in a structure with up to 12 reactor modules per UHS.
A safe shutdown earthquake with a peak ground acceleration of 0.5g.
Systems, structures, and components capable of performing their safety functions without AC or DC electric power or operator actions for at least 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> following a design-basis-event (DBE).
Decay heat removal using passive safety systems that do not rely on electrical power to fulfill their safety functions.
Ability to cope with DBEs without the need for operator actions.
NuScale then described the following design features used in the mitigation strategy for NuScale power plant: normal plant operations, UHS design, decay heat removal system, and emergency core cooling system.
At the conclusion of the open session of the meeting, there was an opportunity for the public to provide comments and ask questions. Members of the public made general comments on the discussions and asked clarification type questions. The NRC staff and NuScale personnel provided readily available responses to the questions.
After the public portion of the meeting, the NRC staff and NuScale discussed the proprietary aspect of NuScales approach in a closed session.
NuScales proprietary presentation focused on the approach for the NuScale power plant to demonstrate compliance with the design-related portions of 10 CFR 50.155, including a discussion on:
The event described in 50.155(b)(1)
The event described in 50.155(b)(2)
Items in 50.155(c), (d), and (e)
M. Dudek 3
The NRC staff provided feedback and asked clarifying questions on NuScales approach throughout the presentation. NuScale anticipates submitting its topical report on the mitigation of beyond-design-basis events later this year.
Docket No. 99902078
Enclosure:
List of Meeting Attendees cc: DC NuScale Power, LLC Listserv
- via email NRR-106 OFFICE DNRL/NRLB:PM DNRL/NRLB:LA DNRL/NRLB:PM NAME ASchiller SGreen GTesfaye*
DATE 03/22/23 03/30/23 03/29/23 OFFICE DNRL/NRLB:BC DNRL/NRLB:PM NAME MDudek*
ASchiller DATE 03/30/23 03/30/23
Enclosure U.S. NUCLEAR REGULATORY COMMISSION
SUMMARY
OF THE MARCH 21, 2023, OBSERVATION PUBLIC MEETING TO DISCUSS NUSCALE POWER, LLCS PLAN FOR TOPICAL REPORT ON MITIGATION STRATEGIES FOR DESIGN-RELATED PORTIONS OF TITLE 10 CODE OF FEDERAL REGULATIONS 50.155 List of Meeting Attendees March 21, 2023 Name Organization Patton, Rebecca U.S. Nuclear Regulatory Commission (NRC)
Dudek, Michael NRC Bavol, Bruce NRC Barrett, Antonio NRC Hernandez, Raul NRC Ray, Sheila NRC Schiller, Alina NRC Pohida, Maria NRC Miller, Joshua NRC Nolan, Ryan NRC Dinh, Thinh NRC Robinson, Jay NRC Stubbs, Angelo NRC Tesfaye, Getachew NRC Vasavada, Shilp NRC Vivanco, Ricky NRC Tabatabai, Omid NRC Hughey, John NRC Scarbrough, Thomas NRC Lamb, Taylor NRC Hayden, Thomas NRC Bailey, Stewart NRC Scoma, Stanton NuScale Scanlon, Shane NuScale Maxwell, Chris NuScale Cummings, Kris NuScale Griffith, Thomas NuScale Shaver, Mark NuScale Swanson, Mara NuScale Midlik, David NuScale Bowman, Doug NuScale Brigantic, Adam NuScale Schneider, Jim NuScale McCloskey, Meghan NuScale
2 Name Organization Bristol, Ben NuScale Brown, Tony NEI Holden, Leslie TerraPower Licensing Fields, Sarah Uranium Watch Polich, Timothy RoPower Nuclear Walker, Kalene Public Lee, Michel Council on Intelligent Energy & Conservation Policy Gilmore, Donna San Onofre Safety