ML19225C909

Responds to IE Bulletins 78-12,78-12A & 78-12B, Atypical Weld Matl in Reactor Pressure Vessel Welds. Discusses Actions Taken Re Pressure Vessel Weld Matl Record Search & Lack of Archival Matl for Verification Purposes

ML19225C909
Person / Time
Site:	Pilgrim
Issue date:	06/29/1979
From:	Andognini G BOSTON EDISON CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 7908030236
Download: ML19225C909 (3)

Text

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IN BOSTON EDISON COMPANY GENE 94t OFFICES ECD DQYLSTON S TR E ET Da5 TON, M AESACHtl5ETTS o 219 9

0. CARL ANDOGVINI S U PE RINTEN D E N T NUCLEAR CPERATIONE DEPARTMENT June 29, 1.9 79 BEco. Ltr. #79- 128 Mr. Boyce H. Grier Office of Inspection and Enforcement Region I U.S. Nuclear Regula*.ory Commission 631 Park Avenue King of Prussia, PA. 19406 License No. DPR-35 Docket No. 50-293 Response to 1F Bulletin #78-12,

!!78-12A, #78-12B

Dear S*r:

In letters dated September 29, 1978, November 24, 1978 and March 19, 1978 you transmitted IE Bulletin Nos. 78-12,78-12A, and 78-12B respectively, titled, " Atypical Weld Material in Reactor Pressure Vessel b' elds". Boston Edison Company was requested to take the following actions in response to the subj ect bulletins :

1) Conduct a record search (2) of all primary reactor pressure ve '

weld-ments (excluding partial penetration welds) and submit the fo tiowing information(3)!

a. The weld material manufacturer (s) and the types and form of materials supplied.

b. The specified properties of the 5 eld materials and the completed weldments (Chemistry, mensile and impact properties, as appropriate).

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(2)The record search may be performed by the vessel manufacturer and the requested information reviewed as appropriate by each licensee prior to forwarding tc the NRC. It is not the intent of this Bulletin to require each licensee to individually examine manufacturing records of a generic nature. Records of nonconforming conditions that may be identified by the manufacturer and are uniquely applicable to a specific vessel should however be carefully examined by the owner.

(3)303, ,f the information requested by this Bulletin may have been previously uupplied to the NRC under the Surveillance Program. .

Information previously submitted may be referenced in lieu of resubmittal. -

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BOSTON EDISON COMPANY Mr. Boyce H. Grier June 29, 1979 Page 2

Response

Per footnote #2, please refer to Combustion Engineering generic report titled "Information Requested by ISE Bulletin 78-12, Atypical Weld Material in Reactor Pressure Vessel Welds", as transmitted to Mr. Harold D. Thornburg, Division of Reactor Construction Inspection, dated June 8, 1979.

2) Describe the procedures utilized during fabrication to verify confor-mance to the specifications. Specifically provide the followinz:

a Describe the type, number and dates of tests performed on welding materials to satisfy the material conformance testing requirements for each heat, lot or combination of heat and batch, etc., of welding materials used in the construccion or repair of the reactor pressure vessel in your facility. Indicate whether each heat, lo t or batch subdivision (coil or spool) was tested and the extent of such testing, i.e. , were both ends of a coil or spool of wire tested for each sub-arc flux-wire combination or heat-flux batch combination.

b. Describe the type, number and dates of other tests such as procedure qualification, welder performance tests, in-process checks on pos t-weld tests which were performed.

c. For each of the tests described in 2(a) and 2(b) above, describe the parameters of each test and provide the results obtained.

Response

See response to Item #1.

3) Identify those casee of weld filler material whi.ch did not meet procure-ment specifications based on verification tests, i.e. mechanical or chemical properties. Describe the disposition action taken or the acceptance basis for utilization in vessel fabrication. In such cases, discuss the effect that the atypical weld composition has on the fracture toughness of the weld metal.

Response

Nct applicable per content of Combustion Engineering Report.

4) Provide information on the availability of archive weld materials which might be used for verification purposes.

Response

Boston Edison Company does not have any archive material that could be used for verification purposes.

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BOSTCN EoiscN COMPANY Mr. Boyce 11. Grier June 29, 1979 Page 3 We believe the responses given above adequately respond to your concerns.

Should additional information on this subject be required, please contact us.

Very truly yours,

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cc: Director Of fice of Nuclear Reactor Regulation Division of Project Management Operator Licensina., Branch Washington, D. C. 20555 40uo cr isj