ML18205A212

Summary of Public Meeting with Nuscale Power, LLC, to Discuss Nuscale'S Revised Methodology for Protection Against Turbine Missile Events

ML18205A212
Person / Time
Site:	NuScale
Issue date:	07/26/2018
From:	Omid Tabatabai NRC/NRO/DLSE/LB1
To:	Samson Lee NRC/NRO/DLSE/LB1
Tabatabai O / 415-6616
References
Download: ML18205A212 (5)

Text

July 26, 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 JULY 16, 2018, PUBLIC MEETING WITH NUSCALE POWER, LLC, TO DISCUSS NUSCALES REVISED METHODOLOGY FOR PROTECTION AGAINST A TURBINE MISSILE EVENT On July 16, 2018, representatives of the U.S. Nuclear Regulatory Commission (NRC) and NuScale Power, LLC (NuScale) held a public teleconference meeting to discuss Nucales revised methodology to protect structures, systems, and components (SSCs) important to safety against a turbine missile event. 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. ML18179A076.

Docket No.52-048

Enclosures:

1. Meeting Summary

2. Agenda

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

ML18205A212 *via email NRC-001 OFFICE NRO/DLSE/LB1:PM NRO/DLSE/LB1:LA* NRO/DEI/SEB:BC* NRO/DLSE/LB1:PM NAME OTabatabai MMoore SSamadar OTabatabai DATE 7/23/2018 7/26/2018 7/25/2018 7/26/2018 U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE JULY 16, 2018, PUBLIC MEETING WITH NUSCALE POWER, LLC, TO DISCUSS NUSCALES REVISED METHODOLOGY FOR PROTECTION AGAINST A TURBINE MISSILE EVENT In a June 25, 2018, letter, 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, (ADAMS Accession No. ML18176A394), NuScale Power, LLC (NuScale) provided a summary of its rationale for protecting essential structures, systems, and components (SSCs) from turbine missiles using a barrier-based versus a probabilistic-based approach.

During this public meeting on July 16, 2018, the U.S. Nuclear Regulatory Commission (NRC) staff from Materials and Chemical Engineering Branch and Structural Engineering Branch discussed the following questions with NuScale representatives.

1. Demonstrate that the turbine missile parameters (i.e. mass, velocity, impact area, shape, and hardness of missile) and/or its damage potential to concrete and steel barriers are bounded by the design basis tornado and hurricane missiles.

2. Justify the applicability of the formulas for penetration, spalling, etc. in FSAR Section 5.3 for the turbine missile barrier design.

3. Provide a technical basis for crediting the aircraft impact analysis that is a beyond design basis event for the design basis turbine missile event.

4. Provide a summary of structural analysis of barriers for turbine missiles.

5. Provide a technical basis and justification for turbine missiles spectrum considered from the first-of-a-kind turbine with no operating experience, rotating at twice the speed of a typical PWR turbine.

The NRC staff requested NuScale to make available their supporting documentation to address the above questions including the barrier evaluation due to ostulated turbine missiles NuScale agreed to place its supporting documents on their electronic reading room for the staffs audit.

Additionally, NRC NRO/SEB staff requested for an audit to be set up at the NuScale Rockville, Maryland office.

Enclosure 1

U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE JULY 16, 2018, PUBLIC MEETING WITH NUSCALE POWER, LLC, TO DISCUSS NUSCALES REVISED METHODOLOGY FOR PROTECTION AGAINST A TURBINE MISSILE EVENT MEETING AGENDA Introduction 2:00 - 2:10 pm Discussion of NuScles Revised Methodology 2:10 - 2:50 pm Public Comments 2:50 - 3:00 pm Enclosure 2

U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE JULY 16, 2018, TELECONFERENCE WITH NUSCALE POWER, LLC LIST OF ATTENDEES NuScale Power, LLC Amber Berger Carrie Fosaaen Mark Chitty Zack Houghton Josh Parker Ed Siener Marty Bryan Carl Dumsday Chris Maxwell Edan Engstrom U.S. Nuclear Regulatory Commission Staff Maryam Khan John Honcharik Matt Mitchell BP Jain Omid Tabatabai Marieliz Vera Raul Hernandez Enclosure 3