ML20024D608

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Interim Deficiency Rept Re Incorrect Output Values in Design Calculations W/Potential to Decrease Allowable Stresses in Some Piping Subsystems.Sargent & Lundy Reviewing Stress Repts for Design Inconsistencies.Next Rept by 831118
ML20024D608
Person / Time
Site: Marble Hill
Issue date: 07/29/1983
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, S83-32, SVP-0111-83, SVP-111-83, NUDOCS 8308050333
Download: ML20024D608 (2)


Text

c PUBLIC SERVICE INDIANA S. W. Shields July 29,'1983 senior vice President - S83-32 Nuclear Division SVP-0111-83 Mr. James G. Keppler, Docket Nos.: STN 50-546 Regional Administrator STN 50-547 U. S. Nuclear Regulatory Commission Construction Permit Nos.:

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

Dear Mr. Keppler:

On July 1,1983, Mr. L. G. Yeager of Public Service Company of Indiana, Inc. (PSI) notified your office of a potentially reportable item as required by 10 CFR 50.55(e). A PSI audit of Sargent & Lundy, PSI's architect engineer, identified the use of incorrect input values in design calculations. The use of incorrect values has been shown to decrease allowable stresses in some piping subsystems. This decrease in allowable stresses could potentially allow a situation to arise whereby the safe operations of the plant could be adversely affected.

Sargent & Lundy is currently reviewing stress reports for design inconsistencies to determine the scope of the problem. Any inconsistencies identified will be addressed in the stress report addenda or revisions.

If any impact on issued piping or supports is determined to exist, appropriate corrective action will be taken.

This letter is intended to fulfill the thirty (30) day reporting requirements of 10 CFR 50.55(e) and is considered an interim report.

A further report will be filed on or before November 18, 1983. If you have any questions regarding this matter, please contact me at your convenience.

Sincerel-S. W. Shields SWS/LGY/bak 8308050333 030729 ,

PDR ADOCK 05000546 ...-

s PDR 1 $6'3 g P. O. Box 190, New Washington, Indiana 47162 812. 289 .3000

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PUBLIC SERVICE INDIANA Letter: J. G. Keppler July 29, 1983 S83-32 SVP-Olll-83 cc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 J . E. Konklin J. F. Schapker l

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