TXX-6511, Interim Deficiency Rept CP-86-41 Re small-break LOCA Evaluations of Effects of Operational Status of Equipment During Mode 4.Initially Reported on 860528.Westinghouse Owners Group Evaluating Issue.Next Rept Expected by 880229

Interim Deficiency Rept CP-86-41 Re small-break LOCA Evaluations of Effects of Operational Status of Equipment During Mode 4.Initially Reported on 860528.Westinghouse Owners Group Evaluating Issue.Next Rept Expected by 880229

ML20215B620
Person / Time
Site:	Comanche Peak
Issue date:	06/12/1987
From:	Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
CP-86-41, TXX-6511, NUDOCS 8706170385
Download: ML20215B620 (1)

Text

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Log # TXX-6511 File # 10110 Ref # FR50.55(e)  !

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TUELECTRIC June 12,1987 I William G. Counsli Executive Vice President U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 J

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKETS NOS. 50-445 AND 50-446 SMALL BREAK LOCA MODE 4 OPERATION SDAR: CP-86-41 (INTERIM REPORT)

Gentlemen:

On May 28, 1986, we verbally notified your Mr. Ian Barnes of a deficiency involving small break LOCA evaluations regarding the effects of the j operational status of plant equipment during Mode 4 operation. This is an  !

interim report of a potentially reportable item under the provisions of j 10CFR50.55(e). Our most recent interim report was logged TXX-6062, dated  ;

October 29, 1986.

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At this time, the issue of Small Break LOCA in Mode 4 has not been resolved by i the Westinghouse Owners Group (WOG). The WOG met with the NRC staff on l November 6,1986, in Bethesda to discuss the W0G's plans for resolving the  !

issue. As a result of questions arising from that meeting, the WOG sent a i letter to the NRC dated January 8, 1987, (0G-209) which discussed the  !

feasibility of applying Leak-Before-Break Technology in the resolution of this  !

issue. 1 All WOG activities have been on hold pending word from the NRC, with the  !

exception of the Operations Subcommittee's effort to prepare procedural I guidance which will help operators deal with a LOCA in the shutdown modes.  !

This interim guidance was sent to WOG representatives in W0G-87-102 dated J May 12, 1987, and it is being evaluated by TV Electric.

We anticipate submitting our next report on this issue by February 29, 1988, i

Very truly yours, ,

M W. G. Counsil 1 JCH/gj I l

c - R. D. Martin, Region IV  ;

Resident Inspectors, CPSES (3) l 8706170385 070612 PDR ADOCK 05000445 Th O S PDR h t 0

400 North Olive Street LB 81 Dallas, Texas 75201

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