TXX-4875, Interim Deficiency Rept CP-86-18 Re Difficulties in Starting & Operating Safety Chilled Water Chiller Units.Initially Reported on 860521.Alternative Solution Currently Being Evaluated by York Intl.Next Rept Due on 860724

Interim Deficiency Rept CP-86-18 Re Difficulties in Starting & Operating Safety Chilled Water Chiller Units.Initially Reported on 860521.Alternative Solution Currently Being Evaluated by York Intl.Next Rept Due on 860724

ML20206N853
Person / Time
Site:	Comanche Peak
Issue date:	06/26/1986
From:	Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
CP-86-18, TXX-4875, NUDOCS 8607010526
Download: ML20206N853 (1)

Text

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Log # TXX-4875 File # 10110 909.4 TEXAS UTILITIES GENERATING COMPANY NKYW AY TOWER . 400 NORTIE OLIVE frFREET. L.B. a R . DALLAS. TEXAN 78301 June 26, 1986

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• M?L%ca?.12 Mr. Eric H. Johnson, Director M 7E Division of Reactor Safety and Projects _ [y U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 -

Arlington, TX 76012

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS. 50-445 AND 50-446 SAFETY CHILLED WATER CHILLER UNITS SDAR: CP-86-18 (INTERIM REPORT)

Dear Mr. Johnson:

On May 21, 1986, we notified you that the issue involving difficulties in starting and operating the safety chilled water chiller units was reportable under the provisions of 10CFR50.55(e). The interim report logged TXX-4820, dated May 21, 1986, gave the corrective action as the installation of a by-pass line around the Component Cooling Water (CCW) heat exchanger. An alternative solution is currently being evaluated by York International which may be more cost effective than the originally proposed by-nass line.

An additional concern resulting from this issue is the possible effects of low CCW temperatures on the Reactor Coolant Pump (RCP) thermal barrier coolers.

Westinghouse Corporation has been asked to evaluate this concern. The evaluations by York and Westinghouse are expected to be completed by the end of June, 1986. We are continuing our evaluation and anticipate submitting our next report by July 24, 1986.

Very truly yours,

$ YhdY ,

By_.

'*t' ' g /. .

G. S. Keele Manager, N&c ear Li nsing JCH/arh c - NRC Region IV (0 + 1 Copy)

Director, Inspection & Enforcement (15 copies) ,

U. S. Nuclear Regulatory Commission Washington, D.C. 20555 R- C f re  !!!R7188!R 8t8886 S PDR ss-27 A DEYENION OF TEXAN UTILITIES ELECTRIC COMPANY 9

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