ML20151F766

Forwards Updated Pages to Proprietary BAW-10171P, REFLOD3B- Model for Multinode Core Reflooding Analysis, Per ECCS Methodology for Facilities Reloads.Mod Removes Henry Quench Temp Criteria & Potential Conflict in Logic.Pages Withheld

ML20151F766
Person / Time
Site:	Mcguire, Catawba, McGuire, 05000000
Issue date:	03/29/1988
From:	Taylor J BABCOCK & WILCOX CO.
To:	Norberg J Office of Nuclear Reactor Regulation
Shared Package
ML19302D444	List: ML20151F766
References
JHT-88-65, NUDOCS 8804180447
Download: ML20151F766 (2)

Text

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Babcock & Wilcox Noci r o w .n a McDermott company 3315 Old Forest Road P.O. Box 10935 Lynchburg, VA 24506 0935 (804) 385 2000 1

, March 29, 1988 JHT/88-65 Mr. James A. Norberg, Special Assistant Division of Engineering and System Technology Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

ECCS Methodology for Licensing Catawba and McGuire Reloads Referenco: J. H. Taylor to J. A. Norberg, same subject, JHT/87-268, December 14, 1987.

Dear Mr. Norberg:

The reference given above transmitted the Babcock & Wilcox proprietary Topical Report BAW-10171P, "REFLOD3B." Babcock &

Wilcox has found it necessary to update this report. Enclosed are twenty (20) copies of the report update pages.

The modification to Appendix F removes the Henry quench temperature criteria and a potential conflict in the quench l logic for core slab one. The original logic would allow a non-physical discontinuous change in the heat transfer coefficient of core slab one if the Zq* criteria was satisfied before the quench temperature criteria was satisfied. The change to the Transition Period core outlet flow is to achieve compatibility with Babcock & Wilcox's stated goal (BAW-10171P, 12/87, page 2-

42) of allowing sufficient liquid entrainment to maintain volume 1R two-phase, t

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The report update is considered proprietary as sworn by me as Manager, Babcock & Wilcox Licensing, in my affidavit presented with our April 15, 1987 (J. H. Taylor to Carl Berlinger, JHT/87-085) submittal of the draft topical report and should be treated as such.

Ve ru y yours, J. H. Tay or Manager, Licensing Services cc: w/o attachments R. B. Borsum T. L. Baldwin A. C. Thadani, NRC M. W. Hodges, NRC I

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