ML20010C884

Interim Deficiency Rept Re Heavy Weight Concrete in Biological Shield Walls,Orginally Reported on 810715. Radiation Scan of Walls Is Being Planned to Assess Adequacy of Shielding Properties at Const Joints.Next Rept by 811218

ML20010C884
Person / Time
Site:	Perry
Issue date:	08/14/1981
From:	Davidson D CLEVELAND ELECTRIC ILLUMINATING CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, RDC-34(81), NUDOCS 8108210166
Download: ML20010C884 (2)

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P o BOX 5000 e CLEVELAND, OHIO 44101 m TELEPHONE W16) 622-9800 e ILLUMINATING BLDG e $$ PUBLIC SOUARE D " 0"# "' U " '" "' '"

Datwyn R. Davidson VICE PHEstDENT S' STE M [NG t.EF HiNG ANO CONSTHUCTION

-g I / (9 August 14, 1581 c 'j-f-

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Mr. James G. Keppler _;

Director of Region III 9 -i "O M "u\$

Office of Inspectton and Enforcement gatAn a,t[" h U.S. Nuclear Regulatory Commission ,,

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'p 799 Roosevelt Road ,

Glen Ellyn, Illinois 60137 ,

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,uv' 3 Perry Nuclear Power Plant

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RE: n Docket Nos. 50-440; 50-441 Interim Report on Biological Shield Walls Heavy Density Concrete, Units 1 and 2

[RDC 34(81)]

Dear Mr. Keppler:

This letter serves as an Interim Rcport in accordance with 10CFR50.55(e) concerning the heavyweight concrete in the Biological Shield Walls of both Reactor Buildhsgs. This was first reported by R. Vondrasek of The Cleveland Electric Illuminating Company to L. McGregor of your of fice on July 15, 1981.

This report includes a description of the d _ fl< lency and the methods to be used to evaluate significance pursuant to IPCFR50.55(e).

Description of De.Iciency Lip' . , chalky material, up to three inches (3") thick, was observed at the t o, constructior io!nts of '.he heavyweight bioshield concrete placemcats, for Reactor Bulloing 1 - elevation 654' and for Reactor Bu11dir.n 2-clevation 630'. This material has a bulk specific gravity of approximately seventy-five (7s) pounds per cubic foot, cather than 195 puunds per cubic foot per the specified design requirement. Additionally, this material is soft enough to scratch wie the fingernail and contains no ferrous aggregate.

Due to inaccessibility, only three of twenty-four cells in Reactor Building 2 could be inspected for this material. It could not be determined if this ma erial ever existed at the top construction joints of any of the previous heavyweigh; placements, or if it exists in the inaccessible cells.

Method Proposed for Evaluation A radiation scan of both Liologleal Shield Walls is being planned to assess i the adequacy of shielding properties at the construction jo tnts.

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8108210166 810814 POR ADOCK 05000440

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Mr. Jrmea G, Keppler August 14, 1981

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The resul'.s of this scan will be evaluated by Gilbert Associates, Inc., the Architect / Engineer. Upon completion of this evaluation, a Report will be flied to describe the results el the evaluation and the planned corrective action. This report is scheduled to be submitted December 18, 1981.

Because the required evaluation will be extensive, we are providing the information presently available to remain in com; 11ance with the reporting requirements established by 10CFR50.55(e). If there are any questions, j please don't hesitate to call. l Very truly yours, l l .

. #7D Dalw- R. Davidson Vice President System Engineering and Construction DRD:pab cc: NRC Site Office Mr. Victor Stello, Director of fIce of Inspect ton and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555 U.S. Nuclear Regulatot, "ommission c/o Document Management oranch Washington, D.C. 20555