ML20010A118

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Interim Deficiency Rept Re Breaking of Whaler on Lower Formwork & Possible Gap Between Concrete Containment Wall & Liner,Initially Reported on 790601.Exam of Concrete Backing Initiated.Next Rept Will Be Submitted by 811101
ML20010A118
Person / Time
Site: Marble Hill
Issue date: 07/31/1981
From: Shields S
PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, 79-04, 79-4, NUDOCS 8108110086
Download: ML20010A118 (2)


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Senior Vice Presdent - [f % , ,

Nuclear Division ,t July 31, 1981 79-04 Mr. James G. Keppler, Director Docket Nos.: STN 50-546 U. S. Nuclear Regulatory Commission STN 50-547 Region III Construction Permit No.:

799 Roosevelt Road CPPR - 170 Clen Ellyn, Illinois 60137 CPPR - 171 Marble Hill Nuclear Generating Station - Units 1 and 2

Dear Mr. Keppler:

On June 1, 1979, Mr. F. R. Hodges of Public Service Company of Indiana, Inc. (PSI) notified your office of a potentially reportable item as required by 10 CFR 50.55(e). During the placement of concrete in Pour No. 1CW-Ext.-2 the specified pour rate of 3 to 3 1/2 feet per hour was exceeded. A pour ra'.e of 10 feet in 70 minutes resulted in the breaking of a whaler on the lower portion of fermwork and possibly created a gap between the concrete centainment wall and containment liner, as iliscussed in PSI's interim report of June 1,1/181, it has been determined tl at a small portion of the containment liner will be removed to allow a closer examination of the concrete backing behind the liner. Previously plans had been for the major structural contractor to perform this examination.

J!th the recent return of the containment liner supplier, Chicago Bridge &

Iron,(CB&I), to the site, it has been decided that they will perform this examination. CB & I will require some time to prepare prior to undertaking this task and consequently this examination has not been performed yet.

This letter is intended to fulfill the requirements of an interim report as defined in 10 CFR 50.55(e). A further report will be filed on or before November 1, 1981 .

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P.O. Box 190, New Washington, Indiana 47162 812. 293.4441 AUG 3 1981 /

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PUBUC SERVICE

, INDIANA Letter: J. C. Keppler July 31, 1981 I

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i If you have any questions on this report, please feel free to contact me.

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I TDC/mjg S. W. Shields j

cc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 E. R. Schweibinz, P. E.

J. J. Harrison I,

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