ML20067A843

Interim Deficiency Rept 82-08 Re Unavailable Insp Records for High Strength Bolt Connections of Structural Steel Bolting.Initially Reported 821021.Reinsp Planned.Final Rept Expected by 830115

ML20067A843
Person / Time
Site:	Byron, Braidwood
Issue date:	11/24/1982
From:	Tramm T COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, 5478N, 82-08, 82-8, NUDOCS 8212020329
Download: ML20067A843 (2)

Text

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• ' ' 'N Commonwrith Edison

) one First National Plaza Chicago, lihnois

( s- Address Reply to: Post Office Box 767 Chicago, Illinois 60690 November 24, 1982 Mr. James G. Keppler, Regional Administrator Directorate of Inspection and Enforcement - Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

Byron Station Units 1 and 2 Structural Steel Bolting Inspections NRC Docket Nos. 50-454 and 50-455

Dear Mr. Keppler:

On October 21, 1982 Commonwealth Edison Company notified Mr. H. Wescott of your office of a potential deficiency reportable pursuant to 10CFR50.55(e) regarding inspection records for structural steel bolted connections at Byron Station. For your tracking purposes, this deficiency is numbered 82-08. This is an interim report. The final report will be submitted by January 15, 1983.

Description of Deficiency During a review of structural steel bolting inspection records for the auxiliary building and the river screenhouse, it was determined that inspection records were not available for some of the high strength bolted connections. Specification requirements dictated testing a minimum of 10% of the bolts in each connection.

h Records are notconnections strength bolted available forininspection of 55.9%

the auxiliary of the building andhig%

49 of those connections in the river screenhouse. The lack of records was caused by a failure to establish an accountability system to indicate the status of inspections completed on the part of one contractor. Adequate records exist for inspection of the bolted structural connections in the containment buildings.

Analysis of Safety Implications The lack of inspection records has, of itself, no safety impli-cations. All of the bolts were originally installed and torqued in accordance with approved procedures. The safety implications of undetected deficiencies in bolt torquing could only be established with a case-by-case analysis of the as-found conditions.

8212020329 821124 PDR ADOCK 05000454 S PDR h092g g

J. G. Keppler November 24, 1982 Corrective Action Taken A statistical sampling plan has been established to reinspect the high strength bolted connections. This reinspection is to be performed by the site independent testing contractor in accordance with an approved reinspection procedure. An engineering analysis of the results will then be performed to determine the acceptability of the results.

Due to the research involved to define the scope of the potential deficiency and the steps and time required to complete the inspec-tion program and the final analysis, the final report could not be completed within the 30-day period. At this time, the sampling program is approximately 30% complete. It is expected that a complete report will be submitted by January 15, 1983.

Please direct further questions regarding this matter to this office.

Very truly yours, T' fi l T. R. Tramm Nuclear Licensing Administrator MAS /jc/lm 5478N