TXX-5027, Supplemental Deficiency Rept CP-86-18 Re Difficulties in Starting & Operating Safety Chilled Water Chiller Units. Initially Reported on 860521.Gibbs & Hill Performing Review of Vendor Specs.Next Rept Will Be Submitted by 861217

Supplemental Deficiency Rept CP-86-18 Re Difficulties in Starting & Operating Safety Chilled Water Chiller Units. Initially Reported on 860521.Gibbs & Hill Performing Review of Vendor Specs.Next Rept Will Be Submitted by 861217

ML20215A874
Person / Time
Site:	Comanche Peak
Issue date:	09/19/1986
From:	Counsil W, Keeley G TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
CP-86-18, TXX-5027, NUDOCS 8610060271
Download: ML20215A874 (1)

Text

. _. _ _

Log # TXX-5027

. File # 10110 909.4 TEXAS UTILITIES GENERATING COMPAhT SKYW AY TOWER . 400 NORTH OLIVE STREET, L B. a t . DALIAN. TEXAM 7530 8 September 19, 1986 Myathif.?n SEP 2 51986 Mr. Eric H. Johnson, Director p l Division of Reactor Safety and Projects .

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 (SUPPLEMENTAL REPORT) i l

Dear Mr. Johnson:

1 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). We have submitted supplemental reports logged TXX-4875 and TXX-4934, dated June 26, 1986, and July 24, 1986, respectively.

Currently, the cognizant engineering contractor, Gibbs & Hill is performing a detailed review of vendor specifications and updating the list of components serviced by the component cooling water system. The supplier (York) has indicated the installation of chiller flow control valves will resolve deficiencies with an operating safety chiller, but an evaluation is required (and underway) to review this modification with regards to a standby, non-operating safety chiller which must start during an accident scenario.

Westinghouse is being contracted to evaluate the impact of the 400F CCW temperature on NSSS components. Our final conclusions concerning this issue ,

will be based upon receipt of the information from these vendors.

We are continuing our evaluation and anticipate submitting our next report by  !

December 17, 1986. j 1

Very truly yours, M

W. G. Cou s 1 5 # ' '

g'oogggy$$8 G. S. Keeley 2 S Manager, Licensing JCH/amb l

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