ML20196A043

Providess Notification That Design Verification Activities Related to Calculations Supporting Analytical Values Identified in Gpu Nuclear Ltr to NRC Has Been Completed

ML20196A043
Person / Time
Site:	Three Mile Island
Issue date:	06/15/1999
From:	Langenbach J GENERAL PUBLIC UTILITIES CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
1920-99-20316, NUDOCS 9906220112
Download: ML20196A043 (2)

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A w f M w June 15, 1999 GPU Nuclear, Inc.

Route 441 South NUCLEAR Post office Box 480 M'ddlet wn. PA 17f.57 0480 1920-99-20316 Tel 717 944 7621 U.S. Nuclear Regulatory Commission Attention: Document Control Desk j Washington, DC 20555 Ladies and Gentlemen:

Subject:

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

Operating License No. DPR-50 j Docket No. 50-289 Additional Information - Technical Specification Change Request No. 279 - Core Protection Safety Limit As previously committed, this letter provides notification that the design verification activities related to the calculations supporting the analytical values identified in GPU Nuclear letter to the NRC, dated I May 21,1999 (1920-99-20269), have been completed. The final calculations remen consistent with the  !

analytical values and analysis results as previously reported.

In addition, as discussed in a conference call on June 8,1999, the previous conservative assumption of a low initial pressurizer level of 28-inches has an insignificant affect on peak clad temperature at the 8-fL fuel assembly clevation. As documented in the GPU Nuclear letter to the NRC, dated June 4,1999 (1920-99-20280), the 8-ft. fuel assembly elevation is the limiting peak clad temperature elevation for >

TMI-1. The initial pressurizer level assumption is only predominant at the core inlet elevation (2-ft.

elevation). It is also noted that the limiting peak clad temperature at the 8-ft. elevation reported in the /  !

above referenced GPU Nuclear letter is conservatively calculated based on a bounding LOCA Linear Heat i Rate (LHR) limit of 17.3 kW/ft. The TMI-l current operating Cycle 12 and subsequent Cycle 13 operating limits are based on a LOCA LHR limit at the 8-ft. elevation of 16.8 kW/fL The calculated

~ l TMI l peak clad temperature at the 8-ft elevation based on a LOCA LHR limit of 16.8 kW/ft is only t 1964*F. This value is well below the 10 CFR 50.46 limit of 2200 F. Cycle specific reanalysis supporting 1 the TMI-l Core Operating Limits Report operating limits will consider the possible impact on peak clad temperature if future cycle designs exceed 16.8 kW/ft at the 8-ft. elevation.

l If any additional information is needed, please contact Mr. David J. Distel, Nuclear Licensing and {

Regulatory Affairs at (973) 316-7955.  !

Sincerely, l 9906220112 990615 PDR ADOCK 050002 9 James W. Langenbach

{

1i) Vice President and Director, TMI

/DJD '

cc: Administrator, Region I TMI-l Senior Project Manager TMI-l Senior Resident inspector File No. 98195

l 1920-99-20316 i METROPOLITAN EDISON COMPANY JERSEY CENTRAL POWER AND LIGHT COMPANY PENNSYLVANIA ELECTRIC COMPANY d/b/a l

GPU ENERGY .

1 GPU NUCLEAR, Inc. 1 l

Three Mile Island Nuclear Station, Unit 1 l Operating License No. DPR-50 l Docket No. 50-289 i l

Technical Specification Change Request No. 279 AdditionalInformation COMMONWEALTH OF PENNSYLVANIA )

) SS: l COUNTY OF DAUPHIN ) )

This additional information on Technical Specification Change Request 279 is submitted in support of Licensee's request to change Appendix A to Operating License No. DPR-50 for Three Mile Island Nuclear Station, Unit 1. All statements contained in this submittal have been reviewed, and all such statements made and matters set forth therein are true and correct to the best of my knowledge.

BL ,

VikPresident and Director, $11 Sworn d subsciibedoefore me this I 99,

! day /

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1. Nntarv publir- I Notarial Seal Suzanne C. Miklosik, Notary Public MyC is on xhi es ov 2,1939 Member, Pennsylvania Association of Notanes

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