ML20154B111

Interim & Supplemental Deficiency Repts CP-86-52 & CP-87-76, Respectively Re Cable Tray Splices/Connections.Initially Reported on 870429 & 0925.Isolated Cases of Burndy-Husky Tray Types Identified on Unit 1,as Well as Unit 2

ML20154B111
Person / Time
Site:	Comanche Peak
Issue date:	05/10/1988
From:	Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
CP-86-52, CP-87-76, TXX-88402, NUDOCS 8805170070
Download: ML20154B111 (2)

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to A TXX 88402 Fi e # 10110 r C 903.11 71/ ELECTRIC Ref. # 10CFR50.55(e)

May 10, 1988

%(Miam G, rovaul umm nm,,an, U. S. fluclear Regulatory Comission l Attn: Documut Control Desk l Washington, D. C. 20555

SUBJECT:

C0tWICHE PEAK STEAM ELECTRIC STATION l DOCKET N05. 50-445 Af4D 50-446 i CABLE TRAY SPLICES /C0fiNECTIONS AND

flELD ORILLED CABLE TRAY HOLES l SDAR

CP 66-52 (INTERIM REPORT) l CP-07-76 (SVPPLEMENTAL REPORT)

Gentlemen:

On April 29, 1987, by our letter logged TXX 6415, and on September 25, 1987, by our letter logged TXX-6763, we notified you of reportable deficiencies involving cable tray splice / connections and field drilled cable tray holes in i

Units ! and 2. The purpose of this report is to status the corrective actions relative to these issues pursuant to the provisions of 10CFR50.55(e).

The electrical construction procedures ECP-10, Rev. 9 for Unit I and ECP-10A, Rev. 3 for Unit 2 have been issued.

With regard to misdrilled/ unused holes in cable trays (previously identified in 50AR CP-87-76), the existing criteria per DCA 25066, Rev. 4 has been incorporated in specification ES-100 and applicable construction and inspection procedures.

I Under the Post Construction Hardware Validation Prog.am (PCHVP), data is being gathered per FVM-CS-048 for tray splice connections and for unused holes in n trays. Based upon these data, alternate criteria are being developed to .

evaluate tray acceptability. These criteria will establish minimum load rated I configurations. Specification ES-100 will be updated to reflect not only the standard vendor configuration but also the minimum load rated configuration.

All tray spans will be evaluated to determine their acceptability against the I requirements of ES-100. Locations where the tray design loads are not acceptable per the alternate criteria (i.e. reduced allowables) will be inspected and where necessary, the hardware will be changed to assure i

l compliance with the standard vendor configurations, ph k

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TXX-88402 May 10, 1988 Page 2 of 2 Walkdown, criteria development, evaluations, inspections, and identification of required design changes if any, for Unit 1 and Common area will be completed in accordance with the schedule established in the Post Construction Hardware Validation Program (PCHVP) by August 1, 1988. Hardware changes of trays or of splice plates that do not meet the mi.nimum requirements will be completed by December 1, 1988. Modification of Unit 2 splice plates will be complete prior to Unit 2 fuel load.

Isolated cases of Burndy-Husky tray types have been identified on Unit 1, as well as Unit 2. The testing of the Burndy-Husky splice connections is tentatively scheduled for May 25, 1988. As stated in our previous report, TXX-6699, after the tests are completed, an evaluation cf the test results will be required to determine if any additional corrective action.is necessary. This evaluation activity is scheduled for ccmpletion by August 1, 1988.

.; The results of the Burndy-Husky testing will be discussed in our next report which will be submitted no later than September 16, 1988.

Very truly yours,

/

W. G. Counsil RSB/grr c - Mr. R. D. Martin, Region IV Resident inspectors, CPSES (3) j J

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