ML19330A612

Interim Deficiency Rept Re Reinforcing Steel Installations Not Meeting Spec Requirements.Cause Not Stated.Engineering Evaluation Will Be Performed on Pertinent Reinforced Concrete Elements

ML19330A612
Person / Time
Site:	Marble Hill
Issue date:	07/24/1980
From:	Shields S PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA
To:
References
NUDOCS 8007280667
Download: ML19330A612 (2)

Text

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0723804003

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~PUBLIC SERVICE INDIANA S. W. Shields Senior Vice Prescen'..

Nuciw on,is' "

July 24, 1980 Mr. James G. Keppler, Director Docket Nos.: STN 50-546 U. S. Nuclear Regulatory Coe=ission STN 50-547 Region III Construction Permit Mos.:

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

Dear Mr. Keppler:

On June 27, 1980, Mr. S. J. Brewer of Public Service Cocpany of Indiana, Inc., (PSI) notified your offx e of a potentially reportable item as required by 10 CFR 50.55(e). Res:Its of reinforcing steel inspections perfomed during the Construction Verification Program in accordance with SPP-2 have shown that there are instances where reinforcing steel installation does not meet specification requirements. These instances occur in the generic areas of clear cover, member thickness, si::e of reinforcing bar, number of bars and bar spacing.

For those reinforced concrete elements affected by the above ite=s an engineering evaluation will be performed to determine if the element can resist the design basis loads in its present condition.

For those reinforced concrete elements where a concern does exist, the following corrective actions will be carried out to mitigate such conce ms:

1. Concrete cover a) 100 much cover - (affects effer >=. ' cth) - add extra bars by drilling and grouting.

b) Not enough cover - (affects corrosion resistance, fire l protection and bond) - gunite surface to insure cover f locally. l

2. Member Thickness Drill and grout extra bars to offset reduction in = ember strength.

80 07280667 P.O. Box 190, New Washington, Indiana 47162 812. 293. 444- )/6 _.

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.,,a aw PUBUC SERVCE INDIANA Letter: Mr. Jamas C. Keppler July 24, 1980

3. Rebar Size Drill and grout extra bars to offset reduction in member strength.

4. Number of Bars Drill and grout extra bars to offset the reduction in member strength.

5. Bar Spacing (Concern only exists when required number of bars is deficient)

Drill and grout extra bars to offset the reduction of member strength.

A more detailed description of these concerns and corrective actions will be available as part of the report on the Construction Verification Program in the near future.

This letter is intended to fulfill the requirements of an interim report as defined in 10 CFR 50.55(e). A final report will be submitted on or before September 11, it?O. If you have any questions en this report please feel free to contact me.

Sincerely,

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S. W. Shields TEG/cg c: . Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 E. R. Schweibinz, P. E.

J. J. Harrison

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