ML20078N887

Provides Response to Open Items from 940824 ACRS Subcommittee Meeting on Thermal Hydraulic Phenomena

ML20078N887
Person / Time
Site:	05200004
Issue date:	12/01/1994
From:	Marriott P GENERAL ELECTRIC CO.
To:	Bochnert P Advisory Committee on Reactor Safeguards, NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
MFN-150-94, NUDOCS 9412150036
Download: ML20078N887 (2)

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GENuclear Energy l

P. W. Marriott. Manager GeneralEloctric Company AthencedPImt Tectrologies 175 Curtnor Am1ve. MC 78I San Jbse CA 95125-1014 l 4069256948(phone) 4089251193(facsmikr) l l

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December 1,1994 MFN No.150-94 i Docket STN 52-004 Document Control Desk U. S. Nuclear Regulatory Commission Washington DC 20555 ,

Attention: Paul A. llochnert AMsory Committee on Reactor Safeguards (ACRS)

Subject:

Response to Open Items from the August 24,1994, ACRS

" Subcommittee Meeting on Thermal IIydraulie Phenomena"

References:

1. Omcial Transcript of Proceedings, Wednesday, August 24, 1994, Ann Riley & Associates, Ltd.

The enclosure to this letter contains responses to open items from the referenced ACRS Subcommittee meeting.

Sincerely, W? $

P. W. Marriott, Manager b" Advanced Plant Technologies

Enclosures:

Responses to Open Items from the August 24,1994 ACRS Thermal Hydraulic Subcommittee Meeting.

cc: W. R. llorchardt (NRC) l R. W. Ilasselberg (NRC)

J. H. Wilson (NRC) l

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'9412150036 941201 PDR ADOCK 05200004 p PDR QI i

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l Attaciunent to MFN No.150-94 Open Item 161&l65 Provide a discussion of the SilWR unique modeling/ analysis to address hydrodynamic loads in the SBWR suppression pool.

GE Response 164&l65 The SilWR treatment of hydrodynamic loads is presented in Appendix 6A of the SilWR SSAR.

Open Item 176&l77 Provide a description of the GDCS squib valves to include a discussion as to their reliability.

GE Response 176&l77 A discussion of the squib valves is provided in Section 6.3.2 of the SilWR SSAR. The design of the GDCS squib valves is similar to that of the DPVs, for which an FMEA has been performed and is presented in Appendix 111 of the SilWR i SSAR.

Open Item 177&l78 Describe GE's investigation of the use ofInconel 690 in the SilWR/ABWR, and the material and design considerations of use of Inconel 600 grade materials in the SBWR IC in particular.

GE Response 177&l78 The open literature contains numerous articles discussing the use of Inconel 600 alloys, including Inconel 690, in nuclear applications for both BWRs and PWRs. GENE continues to monitor this information as well as conduct its own research on the use of Inconel 600 and other alloys.

The culmination of this experience is reflected in a GE specification covering materials and process controls for SBWR application.