ML20206E785

Confirms Intention to Use FOAM2 Computer Program as Part of ECCS Evaluation Model for Westinghouse Designed Plants. Review of Applicability of Code to Westinghouse Designed Plants Requested Prior to 880701

ML20206E785
Person / Time
Site:	Mcguire, Catawba, McGuire, 05000000
Issue date:	04/02/1987
From:	Taylor J BABCOCK & WILCOX CO.
To:	Berlinger C Office of Nuclear Reactor Regulation
References
JHT-87-068, JHT-87-68, NUDOCS 8704130732
Download: ML20206E785 (3)

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Babcock & Wilcox noei , r , oivi.i a McDermott company 3315 Old Forest Road I P.O. Box 10935 i Lynchburg,VA 24506-0935 (804) 385-2000

! April 2, 1987

'JHT/87-068 Mr. Carl Berlinger, Chief Reactor Systems Branch Division of Pressurized Water Reactor Licensing - A Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 i

Subject:

ECCS Application of the FOAM 2 Computer Program for Licensing _ Catawba and McGuire Reloads a=== -e

Dear Mr. Berlinger:

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This letter is to confirm B&W's intent to use the FOAM 2 computer 1 program 1 as part of its ECCS Evaluation Model for Westinghouse designed plants. Specifically, B&W plans to use FOAM 2 for the computation of core swell or mixture level' during small break

LOCA. Documentation of the method of use, input model, and options selection will be ' provided in B&W's Evaluation Model Topical Report, which is presently scheduled for submittal to the NRC by 12/31/87.

4 The NRC has reviewed (Dr. Summer Sun)2,3 and approved FOAM 2 for application to B&W designed plants. The Safety Evaluation-Report 4 (SER), which imposes certain limits on the range of application of the code, is under review at B&W. B&W expects to request an expansion of the range of application for the B&W plant Evaluation Model. The application within the Westinghouse design will also require some range expansion.

B&W does not believe that a detailed review of FOAM 2 is required.

However, a review as to the applicability of the code to Westinghouse designed plants is in order. Such a review may commence now. B&W has requested 5 that this review be completed i by July 1, 1988.

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.. l We hope that the ab'ove information will assist you in planning your work with regards to this matter and other_related matters.

If there are any questions or if additional information 'is required please contact C. F. McPhatter at (804)385-2401.

Very truly yours,

. H. Taylo Manager, Licensing Services.

cc: R. B. Borsum -*

T. L. Baldwin R. J. Schomaker

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• REFERENCES

1. BAW-10155, " FOAM 2 - Computer Program to Calculate Core Swell Level and Mass Flow Rate During Small Break LOCA," November 1982.

2. Letter from J. H. Taylor (B&W) to C. O. Thomas (NRC),

" Transmittal of Responses to a Round of Questions from the .

NRC on the Topical Report FOAM 2, BAW-10155," 15 August 1984.

3. Letter from R. J. Schomaker (B&W) to S. Sun (NRC),

" Justification for Use of FOAM 2 (BAW-10155) at Pressure Up to 2200 psig," 12 September 1986.

4. Letter from D. M. Crutchfield (NRC) to J. H. Taylor (B&W),

" Acceptance for Referencing Topical Report BAW-10155, FOAM 2 - Computer Program to Calculate Core SwelliLevel and Mass Flow Rate During Small Break LOCA," 4 November 1986.

5. Letter from J. H. Taylor (B&W) to Carl Berlinger (NRC),

"ECCS Methodology for Licensing Catawba and McGuire Reloads," JHT/86-166, July 14, 1986.

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