ML18194A673

June 19, 2018, Summary of Public Teleconference with Nuscale to Discuss Responses to Rais Associated with the NuScale Design Certification Application

ML18194A673
Person / Time
Site:	NuScale
Issue date:	07/18/2018
From:	Getachew Tesfaye NRC/NRO/DLSE/LB1
To:	Samson Lee NRC/NRO/DLSE/LB1
Tesfaye G / 415-8013
References
Download: ML18194A673 (6)

Text

July 18, 2018 MEMORANDUM TO: Samuel S. Lee, Chief Licensing Branch 1 Division of Licensing, Siting, and Environmental Analysis Office of New Reactors FROM: Getachew Tesfaye, Senior Project Manager /RA/

Licensing Branch 1 Division of Licensing, Siting, and Environmental Analysis Office of New Reactors

SUMMARY

OF THE JUNE 19, 2018, CATEGORY 1 PUBLIC TELECONFERENCE TO DISCUSS THE NUSCALE POWER, LLC RESPONSES TO REQUESTS FOR ADDITIONAL INFORMATION ASSOCIATED WITH THE NUSCALE DESIGN CERTIFICATION APPLICATION The U.S. Nuclear Regulatory Commission (NRC) held a Category 1 public teleconference on June 19, 2018, to discuss responses to the NRC staff requests for additional information (RAI) associated with the NuScale Power, LLC (NuScale) design certification application. Participants included personnel from NuScale. No members of the general public participated via bridgeline during the meeting.

The public meeting notice dated June 19, 2018, can be found in the NRCs Agencywide Documents Access and Management Systems under Accession No. ML18168A002. This meeting notice was also posted on the NRC public website.

Enclosed is the meeting agenda (Enclosure 1), list of participants (Enclosure 2), and overview (Enclosure 3).

Docket No.52-048

Enclosures:

1. Meeting Agenda

2. List of Attendees

3. Meeting Overview cc w/encl.: DC NuScale Power, LLC Listserv CONTACT: Getachew Tesfaye NRO/DLSE 301-415-8013

ML18194A673 NRO-002 OFFICE DLSE/LB1:PM DLSE /LB1:LA DSRA/SPSB DLSE/RPAC DNRL/LB1:PM NAME GTesfaye MBrown CAshley* SWilliams* GTesfaye (signed)

DATE 7/13/2018 7/18/2018 7/17/2018 7/16/2018 7/18/2018 U.S. NUCLEAR REGULATORY COMMISSION CATEGORY 1 PUBLIC TELECONFERENCE TO DISCUSS THE NUSCALE POWER, LLC RESPONSES TO REQUESTS FOR ADDITIONAL INFORMATION ASSOCIATED WITH THE NUSCALE DESIGN CERTIFICATION APPLICATION MEETING AGENDA June 19, 2018 01:00 - 01:15 PM Introductions and Identification of topics 01:15 - 02:15 PM Discussion of U.S. Nuclear Regulatory Commission Staffs Questions regarding NuScale Power LLCs Responses to Requests Additional Information 9074 and 9236.

02:15 - 02:30 PM Public Comments/Questions 02:30 - 03:00 PM Closed Portion (if needed) 03:00 PM Meeting Closure Enclosure 1

U.S. NUCLEAR REGULATORY COMMISSION CATEGORY 1 PUBLIC TELECONFERENCE TO DISCUSS NUSCALE POWER, LLC RESPONSES TO REQUESTS FOR ADDITIONAL INFORMATION ASSOCIATED WITH THE NUSCALE DESIGN CERTIFICATION APPLICATION LIST OF ATTENDEES June 19, 2018 Name Organization Getachew Tesfaye U.S. Nuclear Regulatory Commission (NRC)

Stephen Williams NRC Zachary Gran NRC Clinton Ashley NRC Angelo Stubbs NRC Nan Chien NRC Carrie Fosaaen NuScale Power, LLC (NuScale)

Mark Royal NuScale Mark Shaver NuScale Jon Bristol NuScale Fred Perdomo NuScale Lee Dougherty NuScale Scott Harris NuScale Jim Osborn NuScale Enclosure 2

U.S. NUCLEAR REGULATORY COMMISSION OVERVIEW OF THE JUNE 19, 2018, TELECONFERENCE TO DISCUSS THE NUSCALE POWER, LLC RESPONSES TO REQUESTS FOR ADDITIONAL INFORMATION ASSOCIATED WITH THE NUSCALE DESIGN CERTIFICATION APPLICATION The purpose of this teleconference was to discuss the results of the U.S. Nuclear Regulatory Commission (NRC) staffs review of NuScale Power LLCs (NuScale) Responses to Requests for Additional Information (RAI) 9074 and 9236.

The following is the summary of the NRC staffs feedback and agreed upon next steps for the resolution of the remaining issues.

1. RAI 9074, Question 09.02.04-1

a. NRC Staff Feedback: The RAI questioned whether the portion of the potable water system (PWS) penetrating the control room envelope and habitability boundary is designed to ensure control room envelope integrity, and prevent in-leakage if subject to a seismic event. In its response, the applicant states that for supply and return lines that penetrates the control room envelope, the PWS isolation device inside the control room envelope (CRE), and the piping between the isolation device and the CRE outer wall are seismic II. The applicant also stated the seismic category II classification protects against in-leakage of radioactive contaminated air into the control room and ensures CRE integrity under a seismic event.

Other PWS piping is designed to seismic III and those portions of the system may be subject to failure during a Safe Shutdown Earthquake (SSE) event. Thus air from outside the control room could enter the PWS through failed PWS piping outside the control room. Since the seismic II isolation device cannot be credited to close during the SSE and the indoor seismic III portions of the system may fail providing a pathway for outside air to enter the control room. The design with seismic II Structures, Systems and Components (SSC) do not protect against in-leakage of radioactive contaminated air into the control room or ensures CRE integrity under a seismic event as the applicant claims.

b. Next Step: NuScale understood the NRC staffs question and agreed to provide supplemantal response with Final Safety Analysis Report (FSAR) markup that describes the loop seal as the isolation device used for PWS.

2. RAI 9236, Question 11.05-1

a. NRC Staff Feedback: After reviewing the NuScale response to RAI 9236, the staff determined further descussion is needed to understand the following points:

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• the data used for range of detector calculation and parameters for instituting the injection process,

• the source of the data and equations used,

• explore if there is a need for NuScale to add a more detailed explanation in a supplemetal respnse to RAI 9236, and

• guidance on what the a combined license (COL) holder needs to provide based on COL Item 5.4-1.

b. Next Step: NuScale understood the NRC staffs question and provided all the information the NRC staff needed to complete its evaluation of the RAI response during the teleconfrence. No further action is required.

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