ML18292A737

July 24, 2018, Summary of the Category 1 Public Teleconference with Nuscale Power, LLC to Discuss the Results of the Emergency Core Cooling System Valve Audit

ML18292A737
Person / Time
Site:	NuScale
Issue date:	10/23/2018
From:	Vera M NRC/NRO/DLSE/LB1
To:	Samson Lee NRC/NRO/DLSE/LB1
Vera A M/NRO/415-5861
References
Download: ML18292A737 (5)

Text

October 23, 2018 MEMORANDUM TO: Samuel S. Lee, Chief Licensing Branch 1 Division of Licensing, Siting, and Environmental Analysis Office of New Reactors FROM: Marieliz Vera, Project Manager /RA/

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

SUMMARY

OF THE JULY 24, 2018, CATEGORY 1 PUBLIC TELECONFERENCE WITH NUSCALE POWER, LLC TO DISCUSS THE RESULTS OF THE EMERGENCY CORE COOLING SYSTEM VALVE AUDIT The U.S. Nuclear Regulatory Commission (NRC) held a Category 1 public teleconference on July 24, 2018, to discuss the results of the emergency core cooling system (ECCS) valve audit of the NuScale Power, LLC (NuScale) Design Certification Application. Participants included personnel from NuScale and members of the public.

The public meeting notice can be found in the Agencywide Documents Access and Management Systems (ADAMS) under Accession No. ML18200A048. This meeting notice was also posted on the NRC public website.

The meeting agenda and list of participants can be found in Enclosures 1 and 2, respectively.

CONTACT: Marieliz Vera, NRO/DLSE 301-415-5861

S. Lee 2 Summary:

The purpose of this meeting was to discuss the path forward to resolve the ECCS valve audit findings, audit report (ADAMS Accession No. ML18219B634). The main topics discussed were the partial opening of an ECCS valve, the proof of concept, and the inadvertent actuation block (IAB). NuScale plans to submit a letter laying the path forward on resolution of the (1) potential on partial opening of an ECCS valve and, (2) the proof of concept. The NRC staff discussed its determination that the IAB device for the ECCS valves is an active component. The NRC staff also discussed its determination that the IAB is outside the scope of SECY-94-084, Policy and Technical Issues Associated with the Regulatory Treatment of Non-Safety Systems in Passive Plant Designs, for all of the following reasons:

• The IAB is not of similar design or simplicity to the valve type discussed in SECY 084.

• The IAB operates in a different manner by needing to change position multiple times during the event.

• The IAB has no operating experience and limited testing to establish performance history or reliability.

NuScale considers the IAB as a passive component, a follow up public meeting will be schedule to further discuss the IAB.

Docket No.52-048

Enclosures:

1. Meeting Agenda

2. List of Attendees cc w/encls.: DC NuScale Power, LLC Listserv

ML18285A032 *via email NRC-002 OFFICE NRO/DLSE/LB1: PM NRO/DLSE/LB1: LA NRO/DNRL/LB1: PM NAME MVera MMoore MVera DATE 10/19/2018 10/23/2018 10/23/2018 U.S. NUCLEAR REGULATORY COMMISSION CATEGORY 1 PUBLIC TELECONFERENCE WITH NUSCALE POWER, LLC TO DISCUSS THE RESULTS OF THE EMERGENCY CORE COOLING SYSTEM VALVE AUDIT OF THE CERTIFICATION APPLICATION July 24, 2018 1:00 p.m. - 3:00 p.m.

AGENDA Public Meeting 1:00 - 1:15 p.m. Welcome and Introductions 1:15 - 2:15 p.m. Discussion of ECCS audit results and path forward 2:15 - 2:30 p.m. Public - Questions and Comments 2:30 - 3:00 p.m. Closed portion Enclosure 1

U.S. NUCLEAR REGULATORY COMMISSION CATEGORY 1 PUBLIC TELECONFERENCE WITH NUSCALE POWER, LLC TO DISCUSS THE RESULTS OF THE EMERGENCY CORE COOLING SYSTEM VALVE AUDIT OF THE CERTIFICATION APPLICATION LIST OF ATTENDEES July 24, 2018 NAME AFFILIATION Marieliz Vera U.S. Nuclear regulatory Commission (NRC)

Timothy Lupold NRC Thomas Scarbrough NRC Ryan Nolan NRC Samuel Lee NRC Rebecca Karas NRC Kevin Coyne NRC Shanlai Lu NRC Shana Helton NRC Clinton Ashley NRC Timothy Drzewiecki NRC Robert Taylor NRC Tom Bergman NuScale Power, LLC (NuScale)

Scott Harris NuScale Greg Meyers NuScale Marty Bryan NuScale Colin Sexton NuScale Dan Lassiter NuScale Zack Houghton NuScale Jennie Wike NuScale Sarah Fields Public Enclosure 2