ML18192C147

Summary of June 20, 2018, Public Meeting with NuScale on Chapter 10

ML18192C147
Person / Time
Site:	NuScale
Issue date:	07/12/2018
From:	Omid Tabatabai NRC/NRO/DLSE/LB1
To:	Samson Lee NRC/NRO/DLSE/LB1
Tabatabai O / 415-6616
References
Download: ML18192C147 (5)

Text

July 12, 2018 MEMORANDUM TO: Samuel S. Lee, Chief Licensing Branch 1 Division of Licensing, Siting, and Environmental Analysis Office of New Reactors FROM: Omid Tabatabai, Senior Project Manager /RA/

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

SUMMARY

OF THE JUNE 20, 2018, TELECONFERENCE WITH NUSCALE POWER, LLC TO DICUSS THE U.S. NUCLEAR REGULATORY COMMISSION STAFFS QUESTIONS RELATED TO CHAPTER 10, STEAM AND POWER CONVERSION SYSTEMS On June 20, 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 NuScale Design Certification Application, Tier 2, Chapter 10, "Steam and Power Conversion Systems." 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 the Agencywide Documents Access and Management System (ADAMS) under Accession No. ML18171A063.

Docket No.52-048

Enclosures:

1. Meeting Summary

2. Agenda

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

ML18192C147 *via email NRC-001 OFFICE NRO/DLSE/LB1:PM NRO/DLSE/LB1:LA* NRO/DSRA/SPSB:BC* NRO/DLSE/LB1:PM NAME OTabatabai MMoore CAshley OTabatabai DATE 7/11/2018 7/12/2018 6/27/2018 7/12/2018

U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE JUNE 20, 2018, TELECONFERENCE WITH NUSCALE POWER, LLC TO DICUSS THE U.S. NUCLEAR REGULATORY COMMISSION STAFFS QUESTIONS RELATED TO CHAPTER 10, STEAM AND POWER CONVERSION SYSTEMS The U.S. Nuclear Regulatory Commission (NRC) staff and NuScale Power, LLC (NuScale) discussed NuScales response to the staffs request for additional information (RAI) (9122, Question 10.04.07-3). The NRC staff requested the applicant to propose a combined license (COL) information item to provide operating and maintenance procedures to address water hammer issues for the Condensate and Feedwater System (CFWS). The NRC staff found that the final safety anaylsis report (FSAR) did not sufficiently address water hammer prevention and mitigation measures for the CFWS. Specifically, the FSAR does not ensure that when operation and maintenance procedures are developed, that they will conform to the water hammer-related guidelines outlined in applicable sections of the NuScale Design Specific review standard (DSRS) Section 10.4.7 and NUREG-0927, Evaluation of Water Hammer Occurrence in Nuclear Power Plants. Providing information in the FSAR on the key elements that water hammer prevention measures should take into consideration in FSAR, Tier 2, would ensure development of operating and maintenance procedures by a combined license applicant to minimize the potential for water hammer in the CFWS.

During the meeting, NuScale pointed the NRC staff to several places in the design certification application (DCA) where NuScale had discussed its design features that would demonstrate conformance to the guidance documents and compliance with the applicable regulations. The NRC staff informed NuScale that the presented information in the DCA was not sufficient to allow the staff make a reasonable assurance finding regarding the potential impact of a water hammer event on CFWS. NuScale agreed to strengthen the information contained in Section 10.4.11.3 to demonstrate NuScales conformance with Section 3.0, Water Hammer Prevention and Mitigation Measures, of NUREG-0927, Rev. 1 and NuScale DSRS Section 10.4.7 acceptance criteria.

Before the meeting was adjourned, NuScale also mentioned RAI 9058 and NuScales revised methodology to evaluate a turbine missile event. The NRC staff requested NuScale to provide a copy of the changes in their methodology compared to what has been provided on the docket for the staffs review before the staff could provide any feedback to NuScale. On June 26, 2018, the NRC received a document from NuScale, entitled, NuScale Power, LLC Submittal of Changes to Tier 1 and Tier 2 of the NuScale Final Safety Analysis Report to Support Safeguarding Essential SSC from Turbine Missiles Using Barriers. This document is available in Agencywide Documents Access and Management System under Accession No.

ML18176A394.

Enclosure 1

U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE JUNE 20, 2018, TELECONFERENCE WITH NUSCALE POWER, LLC MEETING AGENDA Introduction 1:00 - 1:10 pm U.S. Nuclear Regulatory Commission staffs questions related to Water Hammer - (Request for 1:10 - 1:45 pm Additional Information 9122, Question 10.04.07-3)

Public Comments 1:55 - 2:00 pm Enclosure 2

U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE JUNE 20, 2018, TELECONFERENCE WITH NUSCALE POWER, LLC LIST OF ATTENDEES NuScale Power, LLC Carrie Foassen Mark Chitty Gary Becker Kevin Drost Scott Harris Carl Dumsday Amber Berger U.S. Nuclear Regulatory Commission Staff Angelo Stubbs Clin Ashley Omid Tabatabai Others Sarah Fields, Uranium Watch Enclosure 3