ML18204A035

July 11, 2018, Summary of the Public Meeting to Discuss Changes to Table 17.4-1

ML18204A035
Person / Time
Site:	NuScale
Issue date:	07/31/2018
From:	Omid Tabatabai NRC/NRO/DLSE/LB1
To:	Samson Lee NRC/NRO/DLSE/LB1
Tabatabai O / 415-6616
References
Download: ML18204A035 (5)

Text

July 31, 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 11, 2018, PUBLIC MEETING WITH NUSCALE POWER, LLC, TO DISCUSS CHANGES TO TABLE 17.4-1 IN THE NUSCALE DESIGN CERTIFICATION APPLICATION, REVISION 1, TIER 2, CHAPTER 17, "QUALITY ASSURANCE AND RELIABILITY ASSURANCE" On July 11, 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 17, "Quality Assurance and Reliability Assurance." 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 under Accession No. ML18170A243.

Docket No.52-048

Enclosures:

1. Meeting Summary

2. Agenda

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

ML18204A035 *via email NRC-001 OFFICE NRO/DLSE/LB1:PM NRO/DLSE/LB1:LA* NRO/DSRA/SPRA:BC* NRO/DLSE/LB1:PM NAME OTabatabai MMoore MHayes (HPhan for) OTabatabai DATE 7/23/2018 7/30/2018 7/31/2018 7/31/2018 U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE JULY 11, 2018, TELECONFERENCE WITH NUSCALE POWER, LLC TO DISCUSS THE STAFFS QUESTIONS RELATED TO CHANGES TO TABLE 17.4-1 IN CHAPTER 17, QUALITY ASSURANCE AND RELIABILITY ASURANCE The purpose of this meeting was for NuScale Power, LLC (NuScale) to provide an explanation for removing the chemical and volume control system (CVCS) components from Table 17.4-1 in Revision 1 of the final safety analysis report (FSAR).

Nuscale provided the U.S. Nuclear Regulatory Commission (NRC) staff with a background of why the valves were included in Revision 0, what changed and what led to its removal from the design reliability assurance program (D-RAP) systems, structures and components (SSC) table in Revision 1 of Chapter 17.4. Nuscale stated that the valves are used to stop the supply of demineralized water to the CVCS system, which otherwise could cause a plant transient.

Nuscale said the failure of the valves to close is modeled in the probabilist risk assessment (PRA) as part of the general transient initiating event. The valves were included in Revision 0 of Table 17.4-1 because at the time of issuing Revision 0, the PRA was not finalized, therefore, the expert panel conservatively added the valves and their function to the RAP list based on the potential to cause a plant transient. When the PRA was finalized, the valves and the general transient were not identified as risk significant. The expert panel subsequently removed the valves from Table 17.4-1 as reflected in Revision 1 of the FSAR. The NRC staff asked clarifying questions about the valve function, system interface, and how its modeled in the PRA. The NRC staff informed Nuscale that the information will be discussed internally to determine the next steps.

Enclosure 1

U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE JULY 11, 2018, TELECONFERENCE WITH NUSCALE POWER, LLC MEETING AGENDA Introduction 1:00 - 1:10 pm Staffs questions related to Table 17.4-1 1:10 - 1:45 pm Public Comments 1:55 - 2:00 pm Enclosure 2

U.S. NUCLEAR REGULATORY COMMISSION

SUMMARY

OF THE JULY 11, 2018, TELECONFERENCE WITH NUSCALE POWER, LLC LIST OF ATTENDEES NuScale Power, LLC David Holick Sarah Bristol Cindy Williams Paul Infanger Russell Goff Patrick Conley U.S. Nuclear Regulatory Commission Staff Michelle Hayes Odunayo Ayegbusi Omid Tabatabai Enclosure 3