ML20247L729

Forwards RAI Re GL 97-04, Assurance of Sufficient NPSH for ECC & Containment Heat Removal Pumps. Info to Be Submitted within 30 Days from Date of Ltr

ML20247L729
Person / Time
Site:	Prairie Island
Issue date:	05/19/1998
From:	Wetzel B NRC (Affiliation Not Assigned)
To:	Richard Anderson NORTHERN STATES POWER CO.
References
GL-97-04, GL-97-4, TAC-MA0032, TAC-MA0033, TAC-MA32, TAC-MA33, NUDOCS 9805260054
Download: ML20247L729 (3)

Text

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I Eay 19,~1998 j

L Mr. Roger O. Anderson,' Director-Nuclear Energy Engineering-

. Northem States Power Company '

414 Nicollet Mall Minneapolis, Minnesota 55401

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION ON PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2, REVIEW OF GENERIC LETTER 97-04,

" ASSURANCE OF SUFFICIENT NET POSITIVE SUCTION HEAD FOR EMERGENCY CORE COOLING AND CONTAINMENT HEAT REMOVAL PUMPS" (TAC NOS. MA0032 AND MA0033)

Dear Mr. Anderson:

The staff issued Generic Letter (GL) 97-04 on October.7,1997. The generic letter requested that licensees provide information necessary to confirm the adequacy of the net positive suction head available for emergency core cooling and containment heat removal pumps. By letters dated October 23,1997, and January 5,1998, Northern States Power Company submitted its 30-day and 90-day responses to GL 97-04. The staff has reviewed your responses and has determined that additional information is necessary. Please provide the information in the.

enclosed request within 30 days from the date of this letter. Should you have any. questions, please contact me at (301) 415-1355.

1 Sincerely, Original signedby Beth A. Wetzel, Senior Project Manager Project Directorate Ill-1 Division of Reactor Projects - lil/IV Office of Nuclear Reactor Regulation Docket Nos. 50-282, 50-306'

Enclosure:

Request for Additional Information l

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e Mr. Roger O. Anderson, Dire'ctor Prairie Island Nuclear Generating Northem States Power Company Plant cc:

J. E. Silberg, Esquire Site Licensing Shaw, Pittman, Potts and Trowbridge Prairie Island Nuclear Generating 2300 N Street, N. W.

Plant Washington DC 20037 Northem States Power Company 1717 Wakonade Drive East Plant Manager Welch, Minnesota 55089 Prairie Island Nuclear Generating Plant 1ribal Council Northem States Power Company Prairie Island Indian Community 1717 Wakonade Drive East ATTN: Environmental Department Welch, Minnesota 55089 5636 Sturgeon Lake Road Welch, Minnesota 55089 Adonis A. Nebiett Assistant Attomey General Office of the Attorney General 455 Minnesota Street l

Suite 900 1

St. Paul, Minnesota 55101-2127 U.S. Nuclear Regulatory Commission Resident inspector's Office 1719 Wakonade Drive East Welch, Minnesota 55089-9642 Regional Administrator, Region 111 U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Mr. Jeff Cole, Auditor / Treasurer Goodhue County Courthouse Box 408 l

Red Wing, Minnesota 55066-0408 Kris Sanda, Commissioner Department of Public Service 121 Seventh Place East l

Suite 200 St. Paul, Minnesota 55101-2145 November 1996 I

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REQUEST FOR ADDITIONAL INFORMATION FOR REVIEW OF SUFFICIENT NET POSITIVE SUCTION HEAD FOR EMERGENCY CORE COOLING AND CONTAINMENT HEAT REMOVAL PUMP ISSUES IN GL 97-04 FOR PRAIRIE ISLAND UNITS 1 AND 2 The staff requests copies of the following information in order to support the review of sufficient net positive suction head (NPSH) for emergency core cooling and containment heat removal 4

pump issues in GL 97-04 for Prairie Island Units 1 and 2:

i 1.

In response to question 1, it was stated that a documented analysis to support the results

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reported in the final safety analysis report (FSAR) could not be found. However, a new

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calculation was prepared and under review at the time of submittal. Has the new calculation been approved for use at Prairie Island?

i 2.

Is the new analysis considered to be your current licensing basis? Will the FSAR be revised to match the results of the new analysis?

3. What was the maximum sump temperature assumed in the NPSH analyses?

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i ENCLOSURE L_

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