TXX-6305, Interim Deficiency Rept CP-85-34 Re Adequacy of Conduit Supports.Initially Reported on 861021.Affected Unistrut Supports Will Be Replaced or Demonstrated as Not Needed. Next Rept Expected by 880201

Interim Deficiency Rept CP-85-34 Re Adequacy of Conduit Supports.Initially Reported on 861021.Affected Unistrut Supports Will Be Replaced or Demonstrated as Not Needed. Next Rept Expected by 880201

ML20212C338
Person / Time
Site:	Comanche Peak
Issue date:	02/27/1987
From:	Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CP-85-34, TXX-6305, NUDOCS 8703030762
Download: ML20212C338 (2)

Text

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_ Log # 1XX-6305 P9 File # 10110 L C 903.9 C Ref. # 10CFR50.55(e) 1UELECTRIC

.,, g m February 27, 1987 Emutne Sier Preaken U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS. 50-445 CONDUIT SUPPORT DESIGN SDAR: CP-85-34 (INTERIM REPORT) }

Gentlemen:

On October 21, 1986, we notified you by our letter logged TXX-6047 of a deficiency involving the adequacy of conduit supports to perform their intended design functions which we deemed reportable under the provisions of 10CFR50.55(e). This is an interim report submitted to status corrective actions implemented to date.

Based upon our evaluation completed to date, additional field verifications of Unit I and common area conduit support systems is required to assure the conduit installations conform to the revised criteria of the S-0910. The S-0910 package governs seismic conduit and support design for Unit 1 and common areas. As-built data will be obtained in accordance with Procedure FVM-CS-033, " Design Control of Electrical Conduit Raceways for Unit 1 Installations in Unit 1 and Common Areas", for Unit I lighting, power and control conduits and FVM-CS-014, " Design Installations in Unit 1 and Common Areas", for Unit 2 conduits in the Unit I and common areas.

As previously reported, Unistrut and transverse supports have been examined differently than in the above mentioned verification activity. For Unistrut supports, a Unistrut Test Program has been implemented to determine the adequacy of Unistrut supports with regard to torsional loading. Any Unistrut support, as determined from testing, having capacities below those given in the original S-0910 package, or not tested, will be replaced or demonstrated to be not needed. Additionally, all transverse supports will either be converted to multidirectional supports or demonstrated to be not needed.

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400 Nuth Olhe Street I H. Mi Dallas. lens 75201

TXX-6305 February 27, 1987 Page 2 The field walkdown activities now underway are scheduled for completion by December 31, 1987.

We anticipate submitting our next report no later than February 1,1988.

Very truly yours,

'll'N W. G. Counsil DAR:lw c - Mr. E. H. Johnson, Region IV Mr. D. L. Kelley, RI - Region IV Mr. H. S. Phillips, RI - Region IV i

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