ML20114E019

Summary of the April 15, 2020, Category 1 Public Teleconference with NuScale Power, LLC to Discuss the Emergency Core Cooling System Boron Distribution of the Design Certification Application

ML20114E019
Person / Time
Site:	NuScale
Issue date:	04/27/2020
From:	Mary Johnson NRC/NRR/DNRL/NRLB
To:	Michael Dudek NRC/NRR/DNRL/NRLB
Vera Amadiz M
References
Download: ML20114E019 (7)

Text

April 27, 2020 MEMORANDUM TO:

Michael I. Dudek, Chief New Reactor Licensing Branch Division of New and Renewed Licenses Office of Nuclear Reactor Regulation FROM:

Marieliz Johnson, Project Manager /RA/

New Reactor Licensing Branch Division of New and Renewed Licenses Office of Nuclear Reactor Regulation

SUMMARY

OF THE APRIL 15, 2020, CATEGORY 1 PUBLIC TELECONFERENCE WITH NUSCALE POWER, LLC TO DISCUSS THE EMERGENCY CORE COOLING SYSTEM BORON DISTRIBUTION OF THE DESIGN CERTIFICATION APPLICATION On April 15, 2020, representatives from the U.S. Nuclear Regulatory Commission (NRC) and NuScale Power, LLC (NuScale), held a Category 1 public teleconference to discuss Emergency Core Cooling System (ECCS) Boron Distribution of the NuScale Design Certification Application. Participants included personnel from the NRC and NuScale. No members of the public were in attendance.

The public meeting notice can be found in the Agencywide Documents Access and Management Systems (ADAMS) Accession No. ML20104C138. This meeting notice was also posted on the NRC public website located at https://www.nrc.gov/reactors/new-reactors/design-cert/nuscale/documents.html.

The Meeting Agenda and NRCs Presentation Slides can be found in Enclosures 1 and 2, respectively.

In late February 2020, NuScale identified an error in its boron redistribution analysis and followed its corrective action program by communicating its developing design issue to the NRC staff. The NRC staff were informed that a series of changes would be required to address this issue related to boron redistribution and the associated Return to Power analyses associated with Chapter 15, Section 15.0.6, of the final safety analysis report (FSAR) along with an estimated impact to nine other FSAR chapter safety evaluation reports, several topical and technical reports. The proposed design change is complex and safety significant.

CONTACT: Marieliz Johnson, NRR/DNRL 301-415-5861

On March 4, 2020, the NRC staff held an audit entrance meeting at the NRC Headquarters located in Rockville, Maryland. The purpose of the meeting was to: (1) better understand the impact of this design change on information related to Chapter 6, Engineered Safety Features, Chapter 7, Instrumentation and Controls, and Chapter 15, Transient and Accident Analyses, as well as associated technical and topical reports; (2) confirm information through examination of calculations and other information; (3) identify information that will require docketing to support a regulatory finding; and (4) ensure conformance with applicable NRC regulations.

Daily audit status briefings are being held Monday through Friday until the audit exit is determined.

During the April 15, 2020, audit status public meeting, the NRC staff discussed additional information that was needed from NuScale to assess the degree of impact needed to complete the review of the ECCS Boron Distribution issue. The NRC staff described the information that is needed to support the design changes proposed by NuScale as well as dates by which that information would need to be provided to the NRC staff in order for the NRC staff to be able to meet the 42-month review schedule. NuScale indicated that it understood the NRC staffs requests. The NRC staffs slides are enclosed (Enclosure 2).

Docket No.52-048

Enclosures:

As stated cc w/encls.: DC NuScale Power, LLC Listserv

ML20114E019

• via e-mail NRR-106 OFFICE NRR/DNRL/NRLB: PM NRR/DNRL/NRLB: LA NRR/DNRL/NRLB: PM NAME MJohnson CSmith*

MJohnson DATE 4/22/2020 04/27/2020 04/27/2020

U.S. NUCLEAR REGULATORY COMMISSION CATEGORY 1 PUBLIC TELECONFERENCE WITH NUSCALE POWER, LLC TO DISCUSS THE EMERGENCY CORE COOLING SYSTEM BORON DISTRIBUTION OF THE DESIGN CERTIFICATION APPLICATION April 15, 2020 2:00 p.m. - 3:00 p.m.

Meeting Agenda Time Subject 2:00 p.m. - 2:15 p.m.

Welcome and Introductions 2:15 p.m. - 2:40 p.m.

Technical discussion 2:40 p.m. - 2:50 p.m.

Public - Questions and Comments 2:50 p.m. - 3:00 p.m.

Closed portion 3:00 p.m.

Adjourn

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