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LLC Submittal of Presentation Materials Entitled NuScale Power Containment Leak Rate Test Program, PM-0518-59978, Revision 1
	ML18156A127
Person / Time
Site:	NuScale
Issue date:	05/31/2018
From:	Wike J; NuScale
To:	; Document Control Desk, Office of New Reactors
References
	L0-0518-60037
	Download: ML18156A127 (13)
	v • d • e

.::.*:*.. NUS CALE

.:. .:. POWER" L0-0518-60037 May 31 , 2018 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 "NuScale Power Containment Leak Rate Test Program," PM-0518-59978, Revision 1

REFERENCES:

1. Letter from NuScale Power LLC, to Nuclear Regulatory Commission ,

"NuScale Power, LLC Submittal of the NuScale Standard Plant Design Certification Application ," dated December 31 , 2016 (ML17013A229)

2. Letter from NuScale Power LLC, to Nuclear Regulatory Commission ,

"NuScale Power, LLC Submittal of Presentation Materials Entitled

'NuScale Power Containment Leak Rate Test Program,' PM-0518-59978 ,

Revision O, dated May 15, 2018 NuScale Power, LLC (NuScale) participated in a public meeting with the NRC technical staff on May 17, 2018, to discuss the NuScale Containment Design and Appendix J Exemption Request which was submitted to the NRC in the referenced Design Certification Application .

The purpose of this submittal is to provide the presentation materials that NuScale used during th is meeting. The enclosure to this letter contains the presentation entitled "NuScale Power Containment Leak Rate Test Program ," PM-0518-59978, Revision 1.

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

If you have any questions, please contact ennie Wike at 541-360-0539 or at jwike@nuscalepower.com .

Sincerely, J~ (µ~

Manager, Licensing NuScale Power, LLC Distribution : Samuel Lee, NRC, OWFN-8G9A Omid Tabatabai, NRC, OWFN-8G9A Prosanta Chowdhury, NRC, OWFN-8G9A Bruce Bavol , NRC , OWFN-8G9A

Enclosure:

"NuScale Power Containment Leak Rate Test Program", PM-0518-59978, Revision 1 D II)

NuScale Power, LLC 1100 NE Circle Blvd ., Suite 200 Corvallis, Oregon 97330 Office 541 .360-0500 www nuscalepower com Fax 541.207.3928 tJ /(D

.:: . * :*.. NU SCALE

.:. .:. POWER" L0-0518-60037

Enclosure:

"NuScale Power Containment Leak Rate Test Program", PM-0518-59978, Revision 1 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 NuScale Power Containment Leak Rate Test Program May 17, 2018 Jennie Wike Manager, Licensing, NuScale Zack Houghton Manager, NSSS Design, NuScale PM-0518-59978

NuSCALE Revision: 1 Copyright 2018 by NuScale Power, LLC.

POWER-Template #: 0000-21727-F01 R3

Acknowledgement & Disclaimer This material is based upon work supported by the Department of Energy under Award Number DE-NE0000633.

This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.

Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

2 PM-0518-59978 *. NUSCALE Revision: 1 Copyright 201 8 by NuScale Power, LLC. : POWE:R-Template #: 0000-21 727-F01 R3

Agenda

Overview of the NuScale Containment Leak Rate Testing (CLRT) program

Initial design pressure testing and flange contact analysis

Planned responses to eRAI 9474 3

Containment Leak Rate Testing

After shutdown , all Type Band C penetrations are as-found tested Type B penetrations Process Penetrations Electrical Penetrations CNV Closure Flange l&C Division 1 Penetration CNV Head Manway Flange l&C Division 2 Penetration CNV Head CRDM Access Flange Electrical 1 - PZR Power Penetration CNV Manway Electrical 2 - PZR Power Penetration SG Inspection Port 1 l&C Channel A Penetration Flange SG Inspection Port 2 l&C Channel B Penetration Flange SG Inspection Port 3 SG Inspection Port 4 l&C Channel C Penetration Flange PZR Heater Port 1 l&C Channel D Penetration Flange PZR Heater Port 2 CRDM Power Penetration ECCS Trip and Rest Valves (11) RPI Group 1 Penetration CIV Test Port Covers (8) RPI Group 2 Penetration 4

Containment Leak Rate Testing

After shutdown, all Type Band C penetrations are as-found tested Type C penetrations Description Quantity CVCS Injection CIV 2 eves Discharge CIV 2 CVCS PZR Spray CIV 2 RPV High Point Degasification CIV 2 Containment Flood & Drain CIV 2 1

Containment Evacuation CIV 2 RCCWS Supply CIV 2 RCCWS Return CIV 2 SG Thermal Relief Valves 2 5

POWE::R-Template #: 0000-21727-F01 R3

CLRT Overview

As-left Type B or C test on any penetration impacted during maintenance

Local leak rate test (LLRT) results shall meet< 0.6 La

Module moved to operating bay 6

Closure Flange Integrity Test

New test proposed to confirm integrity of the closure flange seal after module movement

- Containment vessel pressurized with air during startup

- Test port monitored to provide assurance of leak tight condition of the closure flange joint with pressure inside containment 7

PM-0518-59978

Design Pressure Testing and Contact Force Analysis

For the initial module, NuScale plans to perform initial design pressure testing of an assembled containment vessel with:

- design bolting materials

- bolt preload tensioning

- design double a-ring seals

Subsequent modules may be initial design pressure tested as upper and lower module sections based on manufacturer limitations

Initial design pressure testing requirements will ensure no leakage through any bolted joint at design basis pressure

NuScale plans to complete analysis to show that contact force is maintained at the sealing joint for all Type B bolted connections

Combination of initial design pressure testing and flange contact force analysis provides reasonable assurance that test program is sufficiently representative of accident conditions 8

PM-0518-59978

P O W E: R-Template #: 0000-21727-F01 R3

NuScale RAI 9474 Response Summary 6.2.6-22 Provide the technical basis for concluding Analysis and initial design pressure testing ensure that Type B and C testing are sufficiently leakage characteristics not substantively different at representative of accident conditions. ambient vs design pressure. Type B and C testing sum to less than 0.6 La .

6.2.6-23 Confirm that the factory hydrotest will be Proposed initial design pressure test as requested on performed on an assembled containment completely assembled initial unit with allowance to test vessel under design conditions. Add an separate upper and lower assemblies on subsequent ITAAC for the ASME code required hydro. units, maintaining design assembly configuration, and captured ITAAC.

6.2.6-24 Confirm intent to demonstrate leak tight As-found Type B for all flanges and as-left Type B on all integrity after each refueling outage. opened flanges prior to return to operations. Closure flange integrity test proposed to ensure maintaining integrity at main seal following transport.

6.2 .6-25 Identify key attributes and inspections verified Inspection of bolting and cover, install of new seals, for vessel reassembly. Add flange bolting preload , verify preload of closure flange. Standard inspection elements to TR-1116-51962. industry practices for bolted joint procedures. Closure flange integrity test proposed to ensure no gross main seal failure during transport.

6.2 .6-26 Provide calculations for total expected Analysis will be completed to show no flange gap at leakage for all flanges, preload , and flange design preload and accident conditions. Calculation will gaps at design pressure. be provided to evaluate potential total leakage from joints. Leakage assumption will be preliminary estimates to show margin only.

Summary

NuScale is proposing a new test to confirm integrity of the closure flange seal after module movement

Maximum allowable leak rate (L 8 ) is demonstrated by

- Type B testing (as-left and as-found)

- Type C testing (as-left and as-found)

- analysis and initial design pressure test assure seal performance during design basis pressure conditions 10 PM-0518-59978 :* *. NUSCALE Revision: 1 Copyright 2018 by NuScale Power, LLC. .. .' POWE:R-Template # : 0000-21727-F01 R3

Portland Office Richland Office 6650 SW Redwood Lane, 1933JadwinAve., Suite 130 Suite 210 Richland, WA 99354 Portland, OR 97224 541 .360.0500 971 .371.1592 Arlington Office Corvallis Office 2300 Clarendon Blvd., Suite 1110 1100 NE Circle Blvd., Suite 200 Arlington, VA 22201 Corvallis, OR 97330 541 .360.0500 London Office 1st Floor Portland House Rockville Office Bressenden Place 11333 WoodglenAve ., Suite 205 London SW1 E 5BH Rockville, MD 20852 United Kingdom 301 . 770.0472 +44 (0) 2079 321700 Charlotte Office 2815 Coliseum Centre Drive, Suite 230 Charlotte, NC 28217 980.349.4804 http://www.nuscalepower.com

'ti Twitter: @NuScale_Power

.::.*:*.. N USCALE

-~. .:. POWERTM 11 PM-0518-59978

NuSCALE Revision: 1 Copyright 20 18 by NuScale Power, LLC. P OWER-Template #: 0000-21727-F01 R3

ML18156A127

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