ML20085E242

Corrected Ltr Requesting Authorization for Use of 1989 Edition of ASME Code for Automatic Welding of Steam Generator Tube Plugs

ML20085E242
Person / Time
Site:	Three Mile Island
Issue date:	10/07/1991
From:	Broughton T GENERAL PUBLIC UTILITIES CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20085E237	List: ML20085E234 ML20085E242
References
C311-91-2123, NUDOCS 9110180113
Download: ML20085E242 (2)

Text

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. CORRECTED COPY GPU Nucleat Corpotetion 3 Nuclear  :=neset=

Middletown, Pennsylvania 17057 0191 717 944 7621 TELEX 84 2386 Writet's Direct Dial Number:

(717) 948-8005 October 7, 1991 C311-91-2123 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555

Subject:

Three Mile Island Nuclear Station, Unit 1 (1M1-1)

Operating License No. DPR-50 Docket No. 50-289 Request for Authorization for Use of the 1989 Edition of the ASME Code for Automatic Welding of Steam Generator Tube Plugs Babcock and Wilcox Nuclear Services Company (BWNS) has designed a steam generator plug made of Alloy 690 material and developed a welding technique to meet the requirements of the 1989 Edition of the ASME Code Sections 111 and XI. The 1989 Code Edition has not yet been approved for use by the NRC, llowever, in a Federal Register Notice published on January 30, 1991, the NRC proposes to amend 10 CFR 50.55a to incorporate all Editicns and Addenda thru the 1989 Edition of Section 111 and XI in a final rule scheduled for issuance in December 1991. The purpose of this letter is to request approval for the use of the 1989 Edition of Secticns 111 and XI of the ASME Code to allow installation of plugs conforming to the BWNS plug design and welding tech-nique. This request for approval is limited to this specific application rather than use of the later Code Edition on a broader basis.

NRC approval for THI-l's use of plugs manufactured with Alloy 690 material has been granted in a letter dated February 9,1990. The BWNS technique based on the 1989 Code utilizes a high integrity remote plug welding process which offers the benefit of lower personnel radiation exposure. GPU Nuclear 9110100113 911007 PDR ADOCK O*5000289 P PDR GPU Nuclear CorporaSon c a subsca'y of Genera: Pubhc Ubbt.es Corporaton

4 Document Control Desk C311 91-2123 l Page 2 of 2 requests the expeditious approval of this request because it may be necassary  ;

and advantageous to use the BWNS remote welded plug during the current refueling outage which began on September 27, 1991.

Sincerely, W ,

T. . Broughton Vice President & Director, THI-l EJP cc: Administrator, Region I THI Senior Resident inspector THI-1 Senior Project Manager I

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