ML20094F700

Forwards Nonproprietary WCAP-13219 & Proprietary WCAP-13212, Evaluation of Thermal Stratification from Postulated Valve Leakage for Comanche Peak Unit 2 RHR Lines. Proprietary WCAP-13212 Withheld (Ref 10CFR2.790)

ML20094F700
Person / Time
Site:	Comanche Peak
Issue date:	02/24/1992
From:	William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20034D247	List: ML20094F700 ML20094F705 ML20094F710
References
TXX-92096, NUDOCS 9202270074
Download: ML20094F700 (2)

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Log # TXX-92096

_ _: File # 903.6

::: Ref. # 10CFR2,790 Y ' ELECTRIC February 24, 1992 WlHimm J. Cabm, Jr.

arnesur rmwe U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 2055S

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES) - UNIT 2 DOCKET N0. 50-446 ANALYSES OF THERMAL STRESSES FOR THE RESIDUAL HEAT REMOVAL LINES Gentlemen:

TV Electric indicated that the issue of potential thermal stratification effects for the CPSES Unit 2 Residual Heat Removal (RHR) suction lines would be submitted before initial criticality. TV Electric has completed analyses of the potential effects of thermal stratification on the CPSES Unit 2 RHR suction lines. These analyses show that potential thermal stratification effects on this piping can be monitored through augmented inservice inspections, and that the requirements "f NRC Bulletin 88-08, Supplement 3 are satisfied. These analyses encompass the phenomena described in NRC Bulletin 88-08 Supplement 3. " Thermal Stresses in Piping Connected To Reactor Coolant Systems."

The first enclosure consists of five (5) copies of WCAP-13212, titled

" Evaluation of Thermal Stratification from Postulated Valve Leakage for the Comanche Peak Unit 2 Residual Heat Removal Lines" (Proprietary).

The second enclosure consists of five (5) copies of WCAP-13219 titled

" Evaluation of Thermal Stratification from Postulated Valve Leakage for the Comanche Peak Unit 2 Residual Heat Removal Lines" (Non Proprietary).

The third enclosure consists of a Westinghouse Application for Withholding Proprietary Information with Accompanying Affidavit CAW-92-270 and i

Proprietary Information Notice and Copyright Notice.

This submittal contains information proprietary to Westinghouse Electric Corporation. it is supported by an affidavit signed by Westinghouse, the owner of the information. The affidavit sets forth the basis on which the information may be withheld f rom public d:s(1ssure by the Commission and addresses with specificity the considerations listed in paragraph (b)(4) of 10CFR 790.

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i Mf 270002 h16("Is 9202270074 920224 400 N. Olive Street L.L. 81 Dallas. Texas 7520t

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QA PDR ADOCK 05000446 P PDR

. . . o TXX-92096 Page 2 of 2 Accordingly, it is respectfully requested that the information which is proprietary to Westinghouse be withheld from public disclosure in a

accordance with 10CFR2.790. Correspondence with respect to the proprietary aspects of the Application for Withholding should reference CAW-92-270 or the supporting Westinghouse affidavit, CAW-92-270 and be addressed to R. P. DiPiazza, Manager of Nuclear Safety Licensing, Westinghouse Electric d

Corporation, P.O. Box 355 Pittsburgh, Pennsylvania 15230-0355.

Sincerely, f 60 (

WilliamJ.rjlbill,Jr.

l CEJ/gj Enclosures l

c - Mr. M. B. Fields, w/ enclosures Mr. R. D. Martin, Region IV w/o Enclosures Resident Inspectors, CPSES (2) w/o Enclosures i

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