ML20086C391

Interim Deficiency Rept Re Main Steam Relief Manifold Nonconformance.Welded Branch Connections Not Radiographed. Initially Reported on 741206.Caused by post-weld Heat Treatments.Repairs to Be Completed by June 1975

ML20086C391
Person / Time
Site:	Salem
Issue date:	12/31/1974
From:	Schwalje E Public Service Enterprise Group
To:	Knuth D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
Shared Package
ML20086C390	List: ML20086C391
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8311230241
Download: ML20086C391 (2)

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J~ OPS $G Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201/622 7000 December 31, 1974 Dr. Donald F. Knuth, Director U. S. Atomic Energy Commission Directorate of Regulatory Operations 7920 Norfolk Avenue Bethesda, Maryland 20014

Dear Dr. Knuth:

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MAIN STEAM RELIEF MANIFOLD '

NDE - NONCONFORMANCE ,

NO. 1 UNIT SAIEM NUC LEAR GENERATING STA' LION DOCKET NO. 50-272 On December 6, 1974 a verbal report was made to Region 1, Directorate of Regulatory Operations that three main steam relief manifolds for No. 1 Unit, Salem Nuclear Generating Station had been received and of which two were partially installed when it was discovered that the welded branch connections had not been radiographed. This report was made in accordance with provisions of 10CFR50.55(e).

The three manifolds delivered are identified as MS-7, .MS-14 and MS-21. During the installation of MS-7 and MS-21 difficulty in fit-up due to out-of-roundness led to a stopu s hipment order to the vendor for the fourth manifold (1-MS-28) to permit shop inspection and repair. The extent of the repairs made*to 1-MS-28 were sufficient to require an additional furnace post veld heat treat-ment. In reply to the vendor's request to permit waiving the require-ment that each shop weld be radiographed following post weld heat treatment, PSE&G advised that it was their opinion that repeat radiog-raphy following heat treatment was not necessary and that the post weld heat treatment would have no deleterious effect on those welds which had been previously radiographed and accepted.

On the repeat review of the prior radiographs the shop code inspector accounted for all the butt welds in accordance with B31.7 but found that there were no radiographs for the welded branch' connections between the weldolets and manifold body. In October 1974 work on the manifolds was stopped in both the field and in the fabricating shop and the vendor was directed to perform radiographic examination of the welded branch connections on all of the subject manifolds. The examination disclosed unacceptable indications which require repairs to quality for PSE&G acceptance. Manifolds MS-7, MS-14 and MS-21 will be returned and repaired in the vendor's shop.

9311230241 750206 PDR S ADOCK 05000272 PDR '

The Energy People gg

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Dr. D. F. Knuth - 2- 12-31-74

The investigation conducted by PSE&G, which included an in-depth audit of the vendor's fabricating facility, disclosed that the vendor had made a misinterpretation of B31 7 code, Table A.7(b) as related to PSE&G Specification No. 61-6200 for Main Steam Piping, Schedule No. IS12, Group A. The shop instructions called for

radiographs for all butt welds, but erroneously omitted the I radiography requirements for the branch connections. Shop instruc-tions called for magnetic particle examination of the welded branch connections and the surveillance by QC was on the basis of those instructions.

Our current audit of the vendor's shop facilities disclosed that his present quality program has been upgraded so as to preclude the likelihood of similar errors in the future.

PSE&G has also reviewed other related work documents to assure full compliance with codes and specifications. The PSE&G Vendor Surveil-lance Representative and the site receipt inspection personnel have been directed to assure themselves of properly approved and correctness of vendor initiated travelers, sketches, or other QC instructions prior to use. To further assure the performance of vendor surveillance resident representatives, more frequent visits of the vendor's facilities will be made by the Supervising Engineer-Vendor Surveillance.

It is estimated that the repairs to the subject welds on the Main Steam Relief Manifolds will be completed by June 1975 Detailed documentation covering this work will be available at the site for your future inspection.

If additional information is desired, we will be pleased to confer with you.

Very truly yours, E. N. Schwalje Manager of Quality Assurance Engineering & Construction Department CC Mr. J. P. O'Reilly King of Prussia, Pa.

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