ML20010F612

Final Deficiency Rept Re Spacing of Concrete Anchors, Originally Reported on 810326.Problem Appears to Be Occurring in Areas Where Two Different Contractors Are Mounting Supports.Contractors Retraining Craft Personnel

ML20010F612
Person / Time
Site:	Fermi
Issue date:	08/28/1981
From:	Wells D DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, EF2-54145, NUDOCS 8109100428
Download: ML20010F612 (2)

Text

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Donald A. Wells

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August 28, 1981 g EF2-54145 @

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Mr. James G. Keppler, Director WRlb&

SEP0.O M h Region III U.S. Nuclear Regulatory Cmmission M g,p h,9, 799 Roosevelt Road %g g Glen Ellyn, Illinois 60137 s

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Subject:

Final Report of 10CFR50.55(c) Item on spacing of Concrete -

Anchors (#42) .

Dear Mr. Keppler:

This is Detroit Edison's final report on the Spacing of Concrete Anchors.

The problem was orginally reported to Mr. G. Fiore111 of NRC-Region III by Detroit Edison's Mr. H.A. Walker, Supervisor-Construction Quality Assurance, on March 26, 1981.

These anchors are used to support pipe, cable trays, air conditioning ducts and other ites. Minimum spacing is specified on engineering docu-ments, and a number of installations have been noted where this minimum spacing requirment has been violated. This appeared to be cxxuring in areas where two different contractors are mounting supports adjacent to each other. For instance, a number of cases were noted where piping sup-ports and cable tray or conduit supports were mounted side by side.

Site contractors have sent Engineering, Quality Control and craft person-nel through a site " Anchor Bolt Installation" training class to ensure they are aware of anchor bolt spacing criteria. Also, the system comple-tion and turnover group has developed a work instruction fcr " Hanger Verification" to be used for system walkdcwn. At this time, anchor bolt spacing will be re-verified to assure they are installed properly to design documents.

If you have questions concerning this matter, r lease contact Mr. H.A.

Walker, Supervisor - Construction Quality Assu~ance.

Very truly yours,g o'i .

o DAW / HAW /pn

$ SI6 8109100428 810828 PDR ADOCK 05000341 S PDR SEP 3 198i

i Mr. James G. Keppler, Director August 28, 1981 -

Page 'Iko F2S81-54145 cc: Mr. Victor Stello, Jr. , Director Office of Inspection and Enforcenent Division of Reactor Inspection Programs U.S. Nuclear Regulatory Cct, mission Washington, D.C. 20555 Mr. Bruce Little, Resident Inspector U.S. Nuclear Regulatory Ccmnission Resident Inspector's Office 6450 North Dixie Highway Newport, Michigan 48166