ML20216H372

Forwards Supplemental Info Re Operation of MOVs Under Power Rerate Conditions,Per 980406 Telcon.Rev 5 to Calculation 98-106, Evaluation for LOCA Aging at 1880 Mwt, Encl,Per 980330 Meeting Between Util & NRC

ML20216H372
Person / Time
Site:	Monticello
Issue date:	04/08/1998
From:	Hammer M NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20216H378	List: ML20216H372 ML20216H402
References
TAC-M97781, NUDOCS 9804210121
Download: ML20216H372 (3)

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Northem States Power Company l

' Monticello Nuclear Generating Plant 2807 West Hwy 75 Monticello, Minnesota 55362 9637 April 8,1998 i

US Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 i i

MONTICELLO NUCLEAR GENERATING PLANT  !

Docket No. 50-263 License No. DPR-22 l

Submittal of Supplemental Information and Identification of Commitment,s for Monticello Power Re. ate Program (TAC No. 97781)

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On March 30,1998, NSP and the NRC staff held a meeting on various aspects of the Monticello i power rerate program including environmental qualification and Motor Operated Valve (MOV) design. NSP stated that it would provide an additional evaluation of the margin between the test profile and the 1880 MWt DBA LOCA profile for certain Monticello plant equipment. This j

, evaluation demonstrates additional margin by using an analysis method that is more l

representative of the actual accident profile. The evaluation is provided as Attachment 1 to this i letter. Subsequent to this meeting, the staff and NSP held a conference call concerning the operation of MOVs under power rerate conditions on April 6,1998. NSP stated that supplementary information on MOVs would be provided. This information is provided as Attachment 2.

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! A comprehensive list of all rerate commitments to date is included in this letter as Attachment 3. l NSP recognizes that these commitments will likely be incorporated into the MNGP license. j Please contact Joel Beres at (612) 295-1436 if additionalinformation is required.

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l h lAf D Michael F. Hammer l

l Plant Manager l l Monticello Nuclear Generating Plant

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'N _9 9804210121 980408 PDR ADOCK 05000263 P PDR J

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c: Regional Administrator-lli, NRC NRR Project Manager, NRC Sr. Resident inspector, NRC State of Minnescia, Attn: Kris Sanda l J. Silberg, Esq.

1 Attachments Attachment 1 Evaluation for LOCA Aging at 1880 Mwt Attachment 2 NSP MOV Information Attachment 3 NSP Commitments for the Monticello Power Rerate l

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I UNITED STATES NUCLEAR REGULATORY COMMISSION NORTHERN STATES POWER COMPANY l

MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO. 50-263 Submittal of Supplemental information and Identification of Commitments for Monticello Power Rerate Program (TAC No. 97781)

Northern States Power Company, a Minnesota corporation, by letter dated April 8,1998 provides its response for the Monticello Nuclear Generating Plant to a US Nuclear Regulatory Commission (NRC) request for additional information pursuant to a meeting l between the NRC staff and NSP on March 30,1998. This letter contains no restricted or other defense information.

l NORTHERN STATES POWER COMPANY ,

l By ~

Mil 4M$A_, ,

Michael F. l-fammer Plant Manager Monticello Nuclear Generating Plant i

l On thish day of k nM

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\MD before me a nocry public in and for said County, personally abpeared Michael F. Hammer, Plant Manager, Monticello ,

Nuclear Generating Plant, and being first duly sworn acknowledged that he is authorized I to execute this document on behalf of Northern States Power Company, and that to the best of his knowledge, information, and belief the statements made in it are true. j t1 . '

Samuel 1. Shirey ( i

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Nota Pub c - Minnesota ,

f,s Y .../ My Comm Exo. Jan.31,2000 ,

MANNNNNNN::^ ^^ ..

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