TXX-5015, Interim Deficiency Rept CP-86-17 Re Min Concrete Coverage for Reinforcing Steel in Floors & Walls to Maintain 3 H Fire Rating.Initially Reported on 860321.Structural Capacity of Concrete Elements Being Evaluated.Next Rept by 861124

Interim Deficiency Rept CP-86-17 Re Min Concrete Coverage for Reinforcing Steel in Floors & Walls to Maintain 3 H Fire Rating.Initially Reported on 860321.Structural Capacity of Concrete Elements Being Evaluated.Next Rept by 861124

ML20214P813
Person / Time
Site:	Comanche Peak
Issue date:	09/17/1986
From:	Counsil W, Keeley G TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
CP-86-17, LER-DEFR-860917-2, TXX-5015, NUDOCS 8609240064
Download: ML20214P813 (2)

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- Log # TXX-5015 File # 10110 909.5 TEXAS UTILITIES GENERATING COMPANY SKYWAY TOWER . 400 NORTH OLIVE RTREET.1.B. 81. DALLAS. TEXAR 75201 September 17, 1986

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hg@MQM@N SEP 181986 Mr. Eric H. Johnson, Director p 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 MINIMUM CONCRETE COVERAGE SDAR: CP-86-17 (INTERIM REPORT)

Dear Mr. Johnson:

On March 21, 1986, we verbally notified your Mr. R. Hall of a deficiency concerning the minimum concrete coverage required for reinforcing steel in the walls and floors necessary to maintain a three-hour fire rating. This is an interim report of a potentially reportable item pursuant to the provisions of 10CFR50.55(e). On September 5, 1986, we requested and received an extension for submitting this report from your Mr. I' Barnes until September 17, 1986.

We have submitted interim reports logged TXX-4768 and TXX-4843, dated April 21, 1986, and-June 6, 1986, respectively.

The cognizant engineering contractor, Gibbs & Hill, has pe. formed a preliminary evaluation of the subject walls and floors that indicates postulated temperatures would not adversely effect the structural capacity of the reinforced concrete elements.

Currently, we are pursuing the proper mea..s by which to validate our analysis consistent with the fire protection criteria specified in the FSAR. These efforts are scheduled for completion November 3,1986.

l We are continuing our evaluation and anticipate submitting our next report on j this issue no later than November 24, 1986.

l Very truly yours, htbf W. G. C il By: ,

G. S. Keeley Q Manager, Licensthg 8609240064 DR 860917 JCH/amb g ADOCK 05000445 PDR l i0 A DIVISION OF TEXAN UT112TIEN ELECTRIC CY)MPANY

$065 . . -

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c - NRC Region IV (0 + 1 copy)

Director, Inspection & Enforcements (15 copies)

U. S. Nuclear Regulatory Comission Washington, D.C. 20555

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