ML20133J914

LLC Submittal of Presentation Materials Entitled Public Meeting Presentation: Topic - Emergency Core Cooling System (ECCS) Boron Distribution, PM-0420-69511, Revision 0

ML20133J914
Person / Time
Site:	NuScale
Issue date:	05/11/2020
From:	Rad Z NuScale
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
LO-0420-69716
Download: ML20133J914 (10)

Text

LO-0420-69716 May 11, 2020 Docket No.52-048 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738

SUBJECT:

NuScale Power, LLC Submittal of Presentation Materials Entitled Public Meeting Presentation: Topic - Emergency Core Cooling System (ECCS) Boron Distribution, PM-0420-69511, Revision 0 NuScale Power, LLC (NuScale) requested a meeting with the NRC technical staff on April 1, 2020, to discuss the Emergency Core Cooling System (ECCS) Boron Distribution path forward. The purpose of this submittal is to provide presentation materials to the NRC used during this meeting.

The enclosure to this letter is the nonproprietary presentation entitled Public Meeting Presentation:

Topic - Emergency Core Cooling System, PM-0420-69511, Revision 0.

This letter makes no regulatory commitments and no revisions to any existing regulatory commitments.

If you have any questions, please contact Matthew Presson at 541-452-7531 or at mpresson@nuscalepower.com.

Sincerely, Zackary W. Rad Director, Regulatory Affairs NuScale Power, LLC Distribution: Gregory Cranston, NRC, OWFN-8H12 Michael Dudek, NRC, OWNN-8H12 Marieliz Johnson, NRC, OWFN-8H12

Enclosure:

Public Meeting Presentation: Topic - Emergency Core Cooling System (ECCS) Boron Distribution, PM-0420-69511, Revision 0 NuScale Power, LLC 1100 NE Circle Blvd., Suite 200 Corvallis, Oregon 97330 Office 541.360-0500 Fax 541.207.3928 www.nuscalepower.com

LO-0420-69716

Enclosure:

Public Meeting Presentation: Topic - Emergency Core Cooling System (ECCS) Boron Distribution, PM-0420-69511, Revision 0 NuScale Power, LLC 1100 NE Circle Blvd., Suite 200 Corvallis, Oregon 97330 Office 541.360-0500 Fax 541.207.3928 www.nuscalepower.com

NuScale Nonproprietary Public Meeting Presentation Topic Emergency Core Cooling System (ECCS) Boron Distribution April 1, 2020 1

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Presenters Ben Bristol Supervisor, System Thermal-Hydraulics Matthew Presson Licensing Project Manager Sarah Bristol Supervisor, PRA Andy Lingenfelter Fuel Engineering Manager Mike Melton Licensing Manager 2

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Agenda

• ECCS Boron Transport

- Update and Resolution/ECCS Actuation Change

• ECCS Actuation Change - Schedule /Discussion

• Conclusion 3

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ECCS Boron Transport - Update/Resolution Update:

In preparation for Ch. 15 ACRS subcommittee meeting NuScale determined under certain conditions, ECCS actuated later than expected and resulted in higher containment water level accumulation than is considered in RAI 8930 response basis.

Resolution and Design Change to ECCS Actuation:

NuScale is implementing a design change to ECCS actuation, which will be modified to actuate earlier to eliminate potential concerns related to containment water level accumulation and downcomer dilution.

No change in resolution since prior NRC pubic update on March 9th.

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ECCS Actuation Change - Schedule for discussion Audit Documents Documents for audit Ready for audit in eRR Analytical Limits Report Rev 8 April 13 IORV Assessment April 14 CNV P&T Assessment April 17 LTC Assessment April 14 LOCA Spectrum Assessment April 23 ECCS Actuation Design Change Basis April 23 PRA Assessment April 23 5

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ECCS Actuation Change - Schedule for discussion Documents for submittal Rev 4 Errata Letter Transmittal with all CPs Provide to Process for NRC support audit transmittal by CP for Tier 1, Chapter 2 Table April 23 CP for Chapter 3 April 23 CP for Chapter 6 April 23 May 20 CP for Chapter 7 April 23 CP for Chapter 15 May 2 CP for Part 4 Technical Specification and Basis May 6 Documents for submittal Provide to Process for NRC support audit transmittal by TR-0616-49121 Setpoint Methodology TR April 23 May 20 TR-0316-22048 Advanced Sensor Methodology TR April 23 May 20 TR-1116-52011 Tech Spec Regulatory Conformance May 6 May 20 and Development TR NuScale would appreciate NRC feedback on any schedule priorities 6

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ECCS Boron Transport - Conclusion

• NuScale is highly committed to plant safety, and to providing a safe and passive design

• In supporting this commitment, NuScales position is that this design change is appropriate to include as part of finalizing the DCA 7

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Portland Office Richland Office 6650 SW Redwood Lane, 1933 Jadwin Ave., Suite 130 Suite 210 Richland, WA 99354 Portland, OR 97224 541.360.0500 971.371.1592 Charlotte Office Corvallis Office 2815 Coliseum Centre Drive, 1100 NE Circle Blvd., Suite 200 Suite 230 Corvallis, OR 97330 Charlotte, NC 28217 541.360.0500 980.349.4804 Rockville Office 11333 Woodglen Ave., Suite 205 Rockville, MD 20852 301.770.0472 http://www.nuscalepower.com Twitter: @NuScale_Power 15 PM-0420-69511 Revision: 0 Copyright 2020 by NuScale Power, LLC.

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