ML20151N758

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Forwards Rev 0 to TR-022, Comparison of Steam Generator Tube Plugging W/TMI-1 Design Basis. Rept Concludes That Plant Operation Would Not Be Affected w/2,000 Tubes Removed from Svc
ML20151N758
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 12/30/1985
From: Hukill H
GENERAL PUBLIC UTILITIES CORP.
To: Stolz J
Office of Nuclear Reactor Regulation
Shared Package
ML20151N762 List:
References
5211-85-2187, NUDOCS 8601030108
Download: ML20151N758 (2)


Text

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, B GPU Nuclear Corporation Nuclear  :=,o=s:r8o Middletown, Pennsylvania 17057-0191 717 944 7621 TELEX 84 2386 Writer's Direct Dial Number December 30, 1985 5211-85-2187 Office of Nuclear Reactor Regulation Attn: John F. Stolz, Chief Operating Reactors Branch No. 4 U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Stolz:

Three Mile Island Nuclear Station Unit 1 (TMI-1)

Operating License No. DPR-50 Docket No. 50-289 Comparison of Steam Generator Tube Plugging with the TMI-l Design Basis In Topical Report 008, " Assessment of THI-l Plant Safety for Return to Service After Steam Generator Repair", GPU Nuclear Corporation provided an assessment of the effects of operating the TMI-l Once through Steam Generators (OTSG's) with 1500 tubes plugged.

Subsequently, GPUN evaluated the effects of operating with additional tubes pl ugged. Topical Report 022, "Comparhen of Steam Generator Tube Plugging with the TMI-l Design Basis", concludes thai. with 2000 tubes removed from service (up to 1500 in OTSG A), plant operation would not be affected, the FSAR analyses of transients and accidents would remain bounding, and no changes to the Technical Specifications would be involved. Operation with 2000 tubes plugged would not involve an unreviewed safety question.

A copy of TR-022, Rev.0 is attached for your information. As discussed in NRC Inspection Report 50-289/85-20 dated August 27, 1985, the NRC has audited TDR-684, Rev.1, which is the GPUN design document on which the Topical Report is based, and concluded that operation with up to 2000 tubes plugged would be acceptable.

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i GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation

y s 5211-85-2187 December 30, 1985 If, at a future time, GPUN is required to plug in excess of 2000 tubes, an y additional analysis will be performed per 10CFR 50.59.

Sincerely,

. D. .ukill

/ Director, TMI-1 HDH/SK/ntk:2530f cc: J. Thoma R. Conte D. Haverkamp ,.

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