ML20247K970

Interim Deficiency Rept CP-89-019 Re Borg Warner Check Valve Failures.Initially Reported on 890626.Check Valves Reworked or Replaced Due to Swing Arm Failure or Degradation.Next Rept Will Be Submitted Prior to Fuel Load for Unit 1

ML20247K970
Person / Time
Site:	Comanche Peak
Issue date:	07/25/1989
From:	William Cahill, Walker R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CP-89-019, CP-89-19, TXX-89517, NUDOCS 8908010110
Download: ML20247K970 (1)

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M . / yE Log l # TXX-89517 1 .--- .

File # 10110

= r . 903.9

' # Ref. # 10CFR50.55(e)

- TUELECTR/C

,  : WRiimen J. Cabal,Jr.

Executive Vke Presklent M

.c U. S; Nuclear: Regulatory Commission

' Attn: Document Control Desk Washington, D. Cis 20555 u

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS. 50-445 AND-50-446; BORG WARNER CHECK VALVE FAILURES SDAR:' CP-89-019'(INTERIM REPORT)

~ Gentlemen:-

'On June 26','1989,'TU Electric verbally notified the NRC of a deficiency involving-the manufacturing ~of:Borg Warner supplied check. valves. This is an interim report submitted on a potential!y reportable condition under the l provisions?of'10CFR50.55(e).

Specifica11y,-Service Water and Containment Spray Systems' check valves

. supplied by Borg Warner.have been reworked or-replaced due to swing arm failure or degradation.

Preliminary. analysis of the check valve internals indicate the presence of manufacturing defects.

Further._eva10ation is required to establish the safety significance and assess the. deportability of this issue. Our next report will be submitted prior to fueliload for Unit 1.

Sincerely.

WA Ske&Qe>9>.

William J. Cahill Jr.

t By: M Roge VD. Walker

' Manager, Nuclear Licensing HAM /ddm c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) [6N h #

8908010110 890725 PDR ADOCK 05000445

..S- PDC 400 North Olive Street LB of Dallas, Texas 73201 ma_ . 1