ML19343D375

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Interim Deficiency Rept Re Excessively Heated Structural Concrete in Which Embedment Plates Were Located,Resulting in Spalling of Concrete,Initially Reported on 810330.Welding Procedures Did Not Include Temp Controls
ML19343D375
Person / Time
Site: Marble Hill
Issue date: 04/28/1981
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, 581-07, 581-7, NUDOCS 8105040355
Download: ML19343D375 (2)


Text

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a4 M B14000 hj e L?! I PUBLIC SERVICE g j '

INDIANA e ke3f' Dg S. W. Shields af senior vice cruident .

Nueleer Division 4 j p'g April 28, 1981 S81-07 Mr. James G. Keppler, Director Docket Nos.: STN 50-546 U. S. Nuclear Regulatory Commission STN 50-547 Region III Construction Permit Nos.:

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

Dear Mr. Keppler:

,, On March 30, 1981, Mr. T. D. Geib of Public Service Company of Indiana, Inc. (PSI) notified your office of a potentially reportable item as required by 10 CFR 50.55(e). PSI Quality Assurance personnel discovered that during welding on safety-related embedment plates by Cherne Contracting Corporation (CCC) structural concrete in which the plates were embedded was excessively heated resulting in spalling of the concrete. Such heating may reduce the strength of the concreto locally and consequently the load bearing capacity. -

l of the embedment plate.

l Subsequent investigation revealed that CCC welding procedures did not include I

temperature controls at concrete-steel interfaces. PSI is presently evalua-l ting this situation to determine what controls, if any, will be necessary to prevent a recurrence of concrete spalling due to embedment heating. A deter-mination of how many embedment locations may have sustained heat damage is also underway at' this time.

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

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P. O. Box 190, New Washington, Indiana 47162 812. 289.1000 ermu ..

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PUBUC SERVICE INDIANA Letter: James G. Keppler April 28, 1981 S81-07 If you have any questions on this report, please feel free to contact me.

Sincerely,

. W. Shields TDc/mj g cc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Cotmission Washington, D. C. 20555 E. R. Schweibinz, P. E.

J. J. Harrison bec: W. M. Petro L. O. Ramsett - ~

T. R. Burns J. U. Bott J. R. Pope G. A. Troxell S. J. Brewer C. G. Beckham C. S. Togni ..

R. H. Porter S. K. Farlow K. L. Tyger I

P. L. Wattelet (S&L) t E. P. Martin (WVPA) l S

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