ML20066D106

Interim Deficiency Rept Re Defective Spot Welds & Power Strut Support Matl.Initially Reported on 820211.Twelve Samples of Power Strut Formed Metal Channels Exhibited Failures.Defective Hangers on Hold.Next Rept by 830305

ML20066D106
Person / Time
Site:	Fermi
Issue date:	11/05/1982
From:	Wells D DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, EF2-60505, NUDOCS 8211110159
Download: ML20066D106 (2)

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Donald A. Wells Managar QuaMy Assurance (313) 237 % 57 2000 Second Avenue 31 3 Novenber 5,1982 EF2-60505 Mr. Janes G. Keppler, Regional Administrator Region III U.S. Nuclear Regulatory Ccanission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Subject:

Interim Report of 10CFR50.55(e) Item on Defective Spot Welds and Power Strut Support Material (#55)

Dear Mr. Keppler:

This interim report on the defective spot welds and Power Strut support material problem has been prepared to provide the current status of this problem.

The problem was originally reported to Mr. J.E. Konklin of NRC Region III by Detroit Edison's Mr. H.A. Walker, Supervisor-Construction Quality Assur-ance, on February 11, 1982.

L.K. Cmstock (a Detroit Edison Contractor) had noted a number of problems with spot welds on ' Power Strut" type PS202 support material. This material was ordered by the site electrical contractor, L.K. Cmstock, frca the Van Huffel Tube Corporation. The problem was first noted in the field when the material separated at several of the manufacturer's spot welds. As a result, twelve samples of the " Power Strut" formed netal channels were sent to Detroit Testing Laboratory. All tw21ve pieces tested exhibited spot weld failures.

To date, approximately fifty hangers have been found with defective Power Strut support material. An investigation to locate additional defective hangers is continuing. These hangers in question will remain "On Hold" pending final dis-position by Sargent and Lundy and Edison Engineering.

Anothar report on this item, either interim or final, is scluduled to be sent on or before March 5, 1983. If you have questions corcerning this tratter, please contact Mr. G.M. Trahey, Assistant Director-Project Quality Assurance.

Very truly yours, DAW /DF/cp

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8211110159 821105 GOV PDR ADOCA 05000341 5 1982 S PDR

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.s r Mr. James G. Feppler, Regional Administrator- Novenber 5, 1982 Page 'Do EF2-60505 i

cc: Mr. Richard DeYoung, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory CcumiEsion Washington, D.C. 20555 Mr. Bruce Little, Senior Resident Inspector -

U.S. Nuclear Regulatory Ccamission 6450 North Dixie Highway Newport, Michigan 48166 f

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