ML20151Q208

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Supplemental Application to Amend Licenses DPR-42 & DPR-60, Revising App K Calculation for Upper Plenum Injection Best Estimate Methodology Program.Return to Nucleate Boiling Conditionally Prohibited During Blowdown.Rept Encl
ML20151Q208
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 08/05/1988
From: Musolf D
NORTHERN STATES POWER CO.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20151Q212 List:
References
NUDOCS 8808110072
Download: ML20151Q208 (1)


Text

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Northern States Power Company 414 N(obet man Minneapons. Minnesota 55401 Telephone (612) 330 5500 August 5, 1988 10 CFR Part 50 Section 50.90 Director of Nuclear Reactor Regulation U S Nuclear Regulatory Commission Attn: Document Control Desk Washington, D C 20555 PRAIRIE IS1AND NUCLEAR GENERATING PLANT Docket Nos. 50-282 License Nos. DPR 42 50-306 DPR 60 Supplemental Information for License Amendment Request Dated July 5,1988 Best Estimate LOCA Analysis The purpose of this letter is to supplement our July 5,1988 License Amend-ment Request submitted for the Prairie Island Nuclear Generating Plant.

Attached for your review is a revised Appendix K calculation required by the NRC Staff draft Safety Evaluation Report for the UPI Best Estimate Methodology Program. This calculation differs from the calculation in Exhibit E of our July 5, 1988 License Amendment Request in that a return to nucleate boiling, after reaching the critical heat flux, is prohibited during blowdown.

An amendment application fee is not required by 10 CFR Part 170 since a fee was included with the July 5, 1988 submittal.

Please contact us if you have any questions related to this License Amend-ment Request.

),[ () bw/ww* s David Musolf Manager Nuclear Support Services c: Regional Administrator-III, NRC Sr Project Manager, NRC Sr Resident Inspector, NRC MPCA Attn: J W Ferman j G Charnoff

Attachment:

DEMONSTRATION OF THE CONFORMANCE OF PRAIRIE ISLAND UNITS 1 AND 2 TO APPENDIX K AND 10CFR50.46 FOR 1ARGE BREAK LOCAS 88o8110072 DR esosos i g p ADOCK 050002s2 PDC {

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