ML20086Q615

Interim Significant Deficiency Rept SDR 3 Re Main Steam Line Restraints.Caused by Design Error.Field Welding Problem Resolved by Using Improved Heaters to Attain Required Weld Preheat.Indepth Matl Testing Program Underway

ML20086Q615
Person / Time
Site:	Peach Bottom
Issue date:	12/07/1972
From:	Boyer V PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Kreusi F US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20086Q560	List: ML20086Q598 ML20086Q603 ML20086Q615
References
SDR-3, NUDOCS 8402270650
Download: ML20086Q615 (2)

Text

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b O O PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET PHILADELPHIA, PA.19101 (215) e41 4 5oO vic rn sosNT Mr. F. Kreusi, Director Directorate of Regulatory Operations United States Atomic Energy Commission Washington, D.C. 20545

Subject:

Significant Deficiency Interim Report Concerning the Main Steam Line Restraints Peach Bottom Atomic Power Station - Units 2 & 3 AEC Construction Permit No. CPPR-37 File: QUAL 2-10-2 SDR No. 3

Dear Sir:

In compliance with 10CFR Part 50 55 paragraph (e), we are hereby submitting the attached Significant Deficiency Interim Report concerning the Main Steam Line Restraints.

The AEC D0R I inspector was notified of this item during his site visit at Peach Bottom on November 8, 9, 1972.

Sincerely,

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Attachment 7

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hf7f:jfp SIGNIFICIANT DEFICIENCY INTERI REPORT PROJECT: Feach Bottom Atomic Power Station 2 CPPR No. 277 UM T.

PREPARED BY: H. B. Winitsky. m 12/7/72 MANAGER, QUAllTY ASSURANCE PROJECT DATE

1. AVAILABLE INFORMATION - DESCRIPTION OF OEFICIENCY Certain items of the Unit No. 2 Main Steam Line Restraints appear to be fabricated from a nonconforming material (based on preliminary laboratory reports of the material tested).

The apparent material nonconformances were identified during the review of a field welding problem.

2.AVAILABLEINFORMATI0h-ANALYSISOFSAFETYIMPLICATIONS None presently available.

3._AVAILABLE INFORMATION - CORRECTIVE ACTION .

The. field welding problem was resolved by using improved heaters to attain the required weld preheat.

An in-depth material testing program is underway to positively identify each item. A program is also underway to evaluate the shop fabiicated welds.

An engineering study is being conducted to determine the extent of this problem and appropriate corrective action.

Lt. SCHEDULE 0 SUBMISSION OATE OF COMPLETE SIGNIFICIANT OEFICIENCY REPORT February 1, 1973 en-to uve tas - enns