ML20236G221

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Advises of Plan to Reconfigure Main Steam Line Rupture Detection Sys Bypass Indicating Lamp.Work Performed to Enhance Human Factors Design.Changes Planned for Completion by End of Cycle 8 Refueling Outage
ML20236G221
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 10/27/1987
From: Hukill H
GENERAL PUBLIC UTILITIES CORP.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
5211-87-2154, NUDOCS 8711020462
Download: ML20236G221 (1)


Text

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GPU Nuclear Corporation NggIgf Post Office Box 480 Route 441 South Middletown, Pennsylvania 17057-0191 717 944 7621 TELEX 84 2386 Writer's Direct Dial Number:

October 27, 1987 5211-87-2154 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 ,

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- Gentlemen:  !

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

Operating License No. DPR-50 '

Docket No. 50-289 MSLRD System Bypass Lamp As requested by Mr. G. Edison (NRR Senior Project Manager, TMI-1), this letter  !

is to advise NRC that GPUN plans to reconfigure the current Main Steam Line Rupture Detection (MSLRD) System bypass indicating lamp. This work is being ,

performed to enhance the human factors design of the system.' For the MSLRD l System, positive indication will be provided for the bypass and enabled  !

condition for each' steam generator. The change to the MSLRD System bypass l indicating lamp will require replacement of the existing hardware. This _l change is being incorporated into a broader program of enhancements to the Heat Sink Protection System (HSPS). Due to the complexity of these enhancements, and so as not.to compromise the requirements of the modification process for, safety related systems (Integrated Schedules for Plant Modifications, NRC Generic Letter 85-07), these changes are now planned for completion by the end of the Cycle 8 refueling outage.

I Sincerely, I t

8711020462 87102729 DR ADOCK 0 . D. H 11 Vice President and Director, TMI-1 l HDH:JCA:jh 5091g cc: R. Conte, NRC J. Stolz, NRC W. Russell, NRC G. Edison, NRC fg(

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

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