ML19031B657

05/05/1976 Letter Steam Generator Head Cladding Indications

ML19031B657
Person / Time
Site:	Salem
Issue date:	05/05/1976
From:	Schwalje E Public Service Electric & Gas Co
To:	O'Reilly J NRC/IE, NRC Region 1
References
Download: ML19031B657 (2)

Text

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Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201/622-7000 May 5, 1976 Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. O'Reilly:

STEAM GENERATOR HEAD CLADDING INDICATIONS NO. 1 UNIT SALEM NUCLEAR GENERATING STATION DOCKET NO. 50-272 On March 8, 1976 a verbal report was made to Region 1, Office of Inspection and Enforcemertt, advising that following the hot functional test of No. 1 Unit, Salem, dye penetrant testing l I

of the stainless steel cladding in the lower head of No. 14 Steam Generator revealed linear indications. This report was in accordance with the provisions of 10CFR50.55(e).

The following is a detailed analysis and report on the subject:

A program of inspection of No. 1 Unit Steam Generators weld metal cladding was initiated by PSE&G as a result of the cladding I !I problems uncovered at Consolidated Edison's Indian Point Unit 11 No. 3 last year. The program included three phases. Phase 1 was inspection before field hydrostatic testing, phase 2 was .r:!I after field hydrostatic testing and phase 3 was after hot functional testing. Inspection results of phase 1 on July 23; 1975 and phase 2 on November 10 and December 12, 1975 did not uncover any linear indications.

The phase 3 initial examination of No. 14 Steam Generator was performed with a solvent dye penetrant (Magnaflux Spotcheck) by the Site. Construction NDE personnel. Indications were observed iti the cold leg side. Westinghouse, Tampa Division, was requested to provide its representative to conduct and complete the examination with the same techniques and procedures as had been previously used at Indian Point No. 3. Presence of linear indications was confirmed on April 7, 1976 by the Westinghouse inspector and the water washable technique. )

The Ener9y People

Mr. J. P. O'Reilly

• 5/5/76 His observatio~ was that the condition at Salem was essentially the same as that found at Indian Point No. 3 after their hot functional test. Dye penetrant testing on April 8, 1976 of the cold leg side of No. 12 Steam Generator encompassing 180° around the upper portion of the channel head approximately 2 ft. wide did not disclose any linear indications. Additional inspection of the same relative area in the cold leg side of No. 14 Steam Generator uncovered additional indications.

Performance of the containment structural integrity test delayed any further inspection. A 100% dye penetrant examination of the cladding on the channel heads, scheduled to be completed on all four steam generators after completion of the containment struc-trual integrity test is in progress. Completion of inspection and evaluation of re~ults are expected by May 28, 1976.

The results of the present inspection program are available at the site for your future inspection~ Should you require ad-ditional information our engineers will be available to discuss the details with you.

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E. N. Schwalje Manager of Quality Assurance Engineering and Construction Department Director, NRC Bethesda, Md.