ML20066C871

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Requests Authorization for Use of once-through Steam Generator Sleeves & Sleeve Plugs Fabricated from I-690 Matl as Alternative to I-600 Matl for Tubular Product & Rod Forms
ML20066C871
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 01/09/1991
From: Broughton T
GENERAL PUBLIC UTILITIES CORP.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
C311-90-2158, NUDOCS 9101110268
Download: ML20066C871 (1)


Text

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  • e a e GPU Nuclear e.aporatin a Nuclear  :::,orsgreo Middletown, Pennsylvania 17057 0101 717 9407621 TELEX 84 2386 Writer's Direct Olal Number:

January 9, 1991 C311-90-2158 U. S. Nuclear Regulatory coratission Attn Mwnt control Desk WashirrJtan, DC 20555 '

Dear Sir  ;

Subject:

Three Mile Island Nuclear Station,- Unit 1 (7MI-1)

Operating License No. DPR-50, Docket No. 50-289 Use of Inoonel 690 (I-690) Material in once 7hrotrJh Steam Gcnerator (OTSG)

GPUN requests authorization for the use of OPSG slooves and sleevo pitxJs fabricated from I-690 mterial as an alternative to the I-600 material, in accor2nce with 10 CFR 50.55a(3) ard ASME Code Caso N474-1 for tubular product ard rod foms.

The I-690 material has superior corrosion resistance proporties ard other nochanical properties similar to I-600. In addition, similar uses for the I-690 material have previously been approved by the NRC.

In order to facilitate preparation for the next refueling outage (scheduled to boirg in October 1991) we request your expeditious revimt ard approval of this authorization request.

Sincerely, i

h  %

T. G. h ton Vice President & Director, TMI-1 HDEl/EP/ pip cc: 7MI-1 Project Marager Regional Administrator - Region I TMI-1 Resident Inspoctor t 9101110268 910109 ph, PDR ADOCK 05000289 P PDR

' p j y r;g pf, GPU Nuclear Corporation is s subsidiary of General Pubhc Utihbes Corporahon (D

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