ML18107A666

Summary of April 9, 2018 Public Meeting with NuScale to Discuss Staff'S Questions Related NuScale DCA, Chapter 20, MBDBE

ML18107A666
Person / Time
Site:	NuScale
Issue date:	04/26/2018
From:	Omid Tabatabai NRC/NRO/DNRL/LB1
To:	Samson Lee NRC/NRO/DNRL/LB1
Tabatabai O / 415-6616
References
Download: ML18107A666 (5)

Text

April 26, 2018 MEMORANDUM TO: Samuel S. Lee, Chief Licensing Branch 1 Division of New Reactor Licensing Office of New Reactors FROM: Omid Tabatabai, Senior Project Manager /RA/

Licensing Branch 1 Division of New Reactor Licensing Office of New Reactors

SUMMARY

OF THE APRIL 9, 2018, PUBLIC MEETING WITH NUSCALE POWER, LLC, TO DISCUSS THE U.S. NUCLEAR REGULATORY COMMISSION STAFF QUESTIONS RELATED TO THE NUSCALES DESIGN CERTIFICATION APPLICATION, TIER 2, CHAPTER 20, MITIGATION OF BEYOND DESIGN BASIS EVENTS On April 9, 2018, representatives of the U.S. Nuclear Regulatory Commission (NRC) and NuScale Power, LLC (NuScale) held a public teleconference meeting to discuss the NRC staffs questions related to the information in NuScales design certification application, Tier 2, Chapter 20, Mitigation of Beyond Design Basis Events. Topics that were discussed during the meeting are available in the Agencywide Documents Access and Management System (ADAMS) under Accession No. ML18085A072. captures the summary of the topics discussed during the teleconference. The agenda and list of meeting attendees are included in Enclosures 2 and 3, respectively. The meeting notice for this meeting is available in ADAMS under Accession No. ML18085A441.

Docket No.52-048

Enclosures:

1. Meeting Summary

2. Agenda

3. Attendees CONTACT: Omid Tabatabai, NRO/DNRL 301-415-6616

ML18107A666 *via email NRC-001 OFFICE NRO/DNRL/LB1:PM NRO/DNRL/LB1:LA* NRO/DSRA/SPSB:BC*

NAME OTabatabai MMoore ADias DATE 4/23/2018 4/18/2018 4/24/2018 OFFICE NRO/DSRA/SRSB:BC* NRR/DE/EENB:BC* NRO/DNRL/LB1:PM NAME RKaras TMartinez Navedo OTabatabai DATE 4/26/2018 4/24/2018 4/24/2018 U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE APRIL 9, 2018, TELECONFERENCE WITH NUSCALE POWER, LLC TO DICUSS STAFFS QUESTIONS RELATED TO CHAPTER 20, MITIGATION OF BEYOND DESIGN BASIS EVENTS The U.S. Nuclear Regulatory Commission (NRC) staff requested this public meeting to discuss several questions related to the information contained in Chapter 20, Mitigation of Beyond Design Basis Events, of the NuScale Power, LLC design certification application (DCA). The NRC staffs detailed questions are available publicly in Agencywide Documents Access and Management System (ADAMS) under Accession No. ML18085A072.

During the meeting, the NRC staff emphasized the need for clarity and consistency in the DCA with respect to NuScales coping duration. Specifically, the NRC staff pointed out to NuScale that based on the docketed available information, the staff is unable to verify NuScales 30-day coping capability, for both cooling and monitoring.

Regarding spent fuel pool level (SFP) monitoring capability, NuScale stated that they want to evaluate the option of separating monitoring because it is not a key factor to demonstrate adequate cooling. The SFP level monitoring is currently limited to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> using the highly reliable direct current system (EDSS) and an additional 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> with the backup batteries.

The NRC staff believes that the current language in the NuScale DCA, Section 20.1.3, is ambiguous and could be misconstrued by a future combined license (COL) applicant that they have 30 days to coping capability after the onset of a beyond design basis event. The NRC staff recommended that NuScale should clarify inconsistencies in the DCA. NuScale agreed to evaluate the information in the DCA, Chapter 20, to clearly identify their coping strategy/duration.

With respect to NRC staffs request for additional information (RAI) 9064, NuScale agreed to supplement its original response (ADAMS Accession No. ML17320B039) with additional information. NuScale also agreed to evaluate if a revision to COL 20.1-8 is needed to address staffs concerns regarding adequate protection of the storage of backup batteries.

Enclosure 1

U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE APRIL 9, 2018, TELECONFERENCE WITH NUSCALE POWER, LLC MEETING AGENDA Time Topic Lead 1:00 - 1:10 pm Meeting Introductions NRC/NuScale 1:10 - 2:10 pm Discussion of Staffs Questions NRC/NuScale 2:10 - 2:15 pm Public Comments/Questions Public 2:15 - 2:20 pm Meeting Conclusion NRC/NuScale Enclosure 2

U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE APRIL 9, 2018, TELECONFERENCE WITH NUSCALE POWER, LLC LIST OF ATTENDEES NuScale Power, LLC Jennie Wike Paul Infanger Nadja Paulman Chris Maxwell Liz English Eric Coryell Pravin Sawant U.S. Nuclear Regulatory Commission Staff Omid Tabatabai Raul Hernandez Nan (Danny) Chien Ngola Otto Chang Li Antonio Dias Clint Ashley Sheila Ray John Budzynski Donald Palmrose Rebecca Karas Carl Thurston Other Attendees Sarah Fields (Uranium Watch)

Enclosure 3