ML20090A185

Interim Deficiency Rept CP-86-41 Re Effect of Small Break LOCA During Mode 4 Operation.Initially Reported on 860528. Util Reviewing Westinghouse Topical Rept to Determine plant- Specific Actions.Update Will Be Submitted by 920828

ML20090A185
Person / Time
Site:	Comanche Peak
Issue date:	02/27/1992
From:	William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CP-86-41, TXX-92072, NUDOCS 9203020184
Download: ML20090A185 (2)

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.======En Log # 1XX-92072 File # 10110 E--

0 CP-86-41 32i I23 Ref.

1. 10CFR50.55(e) 1UELECTRIC february 27, 1992 Wilitare J. Cahllt. Jr.

Gmp M tmi.kst U. S. Nuclear Regulatory Commission Attn:

Document Control Desk Washington, DC 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS 50 445 AND 50-446 SMALL BREAK LOCA MODE 4 OPERA 110N SDAR CP-86-41 (INTERIM REPORT)

REF:

1)

TV Electric Letter logged TXX-91296 f rom William J. Cahill, Jr. to NRC dated August 13, 1991 Gentlemen:

On May 28, 1986. TV Electric orally notified your Mr. 1. Barnes of a deficiency involving evaluation of the ef fect of a small break Loss of Coolant Accident (LOCA) during Mode 4 operation.

This is an interim report of a potentially reportable item under the provisions of 10CFR50.55(e).

As of the last interim report (reference 1), the Westinghouse Owner's Group (WOG) had not issued a final report.

Subsequently. Westinghouse topical report WCAP-12476, " Evaluation of LOCA During Mode 3 and Mode 4 Operation for Westinghouse NSSS,' has been issued and was submitted to the NRC via WOG letter OG-91-61 on November 27. 1991.

The results of this study demonstrate that-the current Emergency Core Coolirg System (ECCS) and ECCS actuation system design for Westinghouse NSSS are adequate for Mode 3 and Mode 4 operation, in addition, analyses have shown that there is adequate operator action time to mitigate the consequences 'sf a small break LOCA.

0200G3 9203020104 920227 J ggg 7 PDR ADOCK 05000445 40c N. Olive street LB. 81 Da!!as. Texas 73201 S.

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'TXy-92072.

- Page 2 of 2' TV Electric is reviewing the topical _ report to determine ~ the' plant specific actions for CPSES, An update delineating these actions will be issued by August 28._1992.

Sincerely, William J. Cahill. Jr.

By:

D

0. R. Woodlan.

Docket Licensing Manager

- DNB/dnb c-

'Mr. R. D. Martin Region IV Resident-Inspectors. CPSES (2).

-Mr. T. A, Bergman, NRR Hr. M. B. Fields. NRR 4

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