ML19224D052

Notifies of RO on 790601:possible Damage to Unit 1 Containment Liner.Visual Insp Indicates Deformation in Liner at Bottom of Pour.Demension Measurements Taken by Chicago Bridge & Iron

ML19224D052
Person / Time
Site:	Marble Hill
Issue date:	06/29/1979
From:	Coughlin J PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 7907100568
Download: ML19224D052 (1)

Text

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Puauc 3EmnCE IND(ANA

- June 29, 1979 D

Director, Office of Inspection & Enforcement U.S. Nuclear Regulatory Comission 799 Roosevelt Road Construction Pemit Nos.: CPPR-170 Glen Ellyn, Illinois 60137 CPPR-171 Marble Hill Nuclear Generating Station Units 1 & 2

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i

, Gentlemen:

f On June 1,1979 Mr. F. R. Hodges of Public Service Company of Indiana, Inc.

l (PSI) telephoned your offico of a potentially reportable incident involving i possible damage to the Marble Hill Unit 1 containment liner. The specified pour rate of 3 to 3 1/2 feet per hour was exceeded during the placement of

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l concrete in Pour #1CW-Ext-2. The excessive pour rate of 10 feet in 70 minutes resulted in the branHng of a whaler on the lover portion of the formwork and possible bowing of the conem h t liner.

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[ Visual inspection indicated that there may be some deformatien in the liner

at the bottom of the subject pour.

i On June 28, 1979 Chicago Bridge & Iron perfomed dimensional measurements i

on the subJact liner. PSI is currently analyzing this data to determine if tha defome. tion of the liner shall is within specification tolerances.

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PSI has not yet detamined if this incident is reportable as a significant deficiency under ICC7R50.55(e). This letter is intended to fulfill the requirements of an interim report as defined in 10CFR50.55(e)(3). A com-I plate report will be filed when the evaluation has been ecmpleted.

i Sincerely l

i r

l D/h%\) -

'? ' m i

I James Coug l

PAB:jb Vice President-Nuclear cc: Director of Inspection & Enforcement /

U.S. Nuclear Regulatory Comission j]d7 r l

Washington, D. C. 20555 1 E. R. Schweibinz, P.E.

OI9 SIa 7907100 5 6 9

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