ML20096C030

Requests Applicable Calculation Sheets for All Revs of Core Monitoring Computers & DCAs Listed in Encl as Well as Submitted Info.Info Necessary to Complete Phase 4 Cable Tray Support Reviews

ML20096C030
Person / Time
Site:	Comanche Peak
Issue date:	07/31/1984
From:	Williams N CYGNA ENERGY SERVICES
To:	George J TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
References
84056.011, NUDOCS 8409040475
Download: ML20096C030 (3)

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Oi cantornia street. suite 1000. san Francisco CA 94111-5894 4E F %T July 31, 1984 84056.011 N

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<f Mr. J. B. George Project Manager Comanche Peak Steam Electric Station Highway FM 201 Glen Rose, Texas 76043

Subject:

Request for Calculations for Affected CVC's Comanche Peak Steam Electric Station Independent Assessment Program - Phase 4 Job No. 84056

Dear Mr. George:

As a part of the cable tray support review calculations for Phase 4, Cygna requested the change verification checklists (CVC's) for a number of CMC's and DCA's. The purpose of these requests was to assure that design changes had been properly evaluated by Gibbs & Hill and to review any required calculations used in the design change evaluation.

On July 20, 1984, Cygna requested a number of CVC's from the site DCTG, All CVC's immediately available were transmitted to Cygna. CVC's for relatively old DCA's were not immediately available. To expedite the review, Mr. T.D. Hawkins of Gibbs & Hill reviewed these old CVC's which were only available at Gibbs &

Hill, and telephoned a list of CVC's requiring calculations as well as the associated calculation numbers to Cygna at the Comanche Peak site. Last week, Cygna requested copies of the calculations listed on the available CVC's and the calculations from the list provided by Mr. Hawkins. Despite these actions, Cygna was still unable to locate calculations for all CVC's for two reasons:

1. CVC's for later revisions of CMC's and DCA's may not require calculations but rather rely on calculations from previous revisions. Therefore, no calculations are referenced on the more recent revision to the CVC. (See list on Attachment A.)

2. For the CMC's and DCA's listed below, Cygna could not locate the calculations as referenced on the CVC.

8409040475 840731 PDR ADOCK 05000445 PDR A

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Mr. J. B. George July 31, 1984 Page 2 CMC 2646 CMC 6187 CMC 12152 DCA 2803 DCA 2904 DCDA S-1107 Cygna requests copies of the applicable calculation sheets for all revisions of the CMC's and DCA's listed in Attachment A as well as those listed in item 2 above. This information is necessary to complete the Phase 4 cable tray support reviews. Please don't hesitate to call if you have any questions or require clarification on this matter.

Very truly yours, o hs  ?'sYA N. H. Williams l Project Manager NHW/JPR/do Attachment cc: Mr. G. Grace (EBASC0/TUEC)

Mr. D. Wade (TVEC)

Mr. R. Ballard (G&H)

Mr. S. Burwell (USNRC)

Mrs. J. Ellis (CASE) l I

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Mr. J. B.~ George July 31, 1984 Page 3 ATTACMENT A CMC DCA 32456 1481 32503 1594 93450 3423~

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