ML20209E840

Discusses Completion of NRC GL 97-04, Assurance of Sufficient Net Positive Suction Head for Emergency Core Cooling & Containment Heat Removal Pumps for Plant

ML20209E840
Person / Time
Site:	Duane Arnold
Issue date:	07/13/1999
From:	Mozafari B NRC (Affiliation Not Assigned)
To:	Protsch E IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
References
GL-97-04, GL-97-4, TAC-M99987, NUDOCS 9907150160
Download: ML20209E840 (4)

Text

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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 2000H001

• • • • • July 13', 1999

.Mr. Eliot Protsch President '

IES Utilities Inc.

200 First Street, SE P.O. Box 351 .

Cedar Rapids, IA 52406-0351

SUBJECT:

COMPLETION OF NRC GENERIC LETTER 97-04, " ASSURANCE OF SUFFICIENT NET POSITIVE SUCTION HEAD FOR EMERGENCY CORE COOLING AND CONTAINMENT HEAT REMOVAL PUMPS," FOR DUANE ARNOLD ENERGY CENTER (TAC NO. M99987)

Dear Mr. Protsch:

On October 7,1997, the U.S. Nuclear Regulatory Commission (NRC) issued Generic Letter (GL) 97-04, " Assurance of Sufficient Net Positive Suction Head for Emergency Core Cooling and Containment Heat Removal Pumps," to all holders of operating licenses or construction permits. By letter dated January 5,1998, IES Utilities Inc. (lES) provided its response regarding GL 97-04 for the Duane Arnold Energy Center (DAEC). By letter dated May 14,1998, we requested additional information regarding the use of containment overpressure to ensure adequate net positive suction head (NPSH) to the emergency core cooling (ECCS) pumps. IES responded to the request by letter dated June 12,1998.

Although DAEC was originally licensed with some credit for containment overpressure for the core spray pumps, the NRC staff was concerned that the reliance on containment overpressure would be increased upon resolution of Bulletin 96-03," Potential Plugging of Emergency Core Cooling Suction Strainers by Debris in Holling-Water Reactors." In a letter dated September 2, 1998, the NRC staff indicated that DAEC might be outside its licensing basis when it implements its proposed resolution of Bulletin 96-03 with respect to credit for containment overpressure.

IES responded to the NRC staff's concern in a letter dated July 1,1999, that provided additional information on the issues raised in the September 1998 letter. IES stated that a new limiting configuration was not created in the revisions to the NPSH analyses. Additionally, IES has not increased its reliance on containment overpressure as part of its resolution of Bulletin 96-03 for DAEC.

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The NRC staff has reviewed the submittals and supporting documentation from lES. Based on () ,

this review, the NRC staff believes that DAEC will not increase its reliance on containment  !

- overpressure above its current licensing basis. Additionally, IES has provided the information ,

requested by Generic Letter 97-04. Based on the information provided, the NRC staff considers that GL 97-04 has been satisfactorily addressed for DAEC. h ggRFCamEC8Pi nW ~

9907150160 990713 PDR ADOCK 05000331 P. PDR ,

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( Gliot Pr,otsch l This letter documents the completion of our activity on TAC No. M99987. We appreciate your efforts with regard to this matter.

If you have any questions, please contact me at 301-415-2020. i Sincerely, ,

Brenda L. Mozafari, Project anager, Section 1 Project Directorate lil Division of Licensing Project Management '

Office of Nuclear Reactor Regulation ,

1 Docket No. 50-331 cc: See next page

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• E,liot Protsch July 13, 1999 This letter documents the completion of our activity on TAC No. M99987. We appreciate your  !

efforts with regard to this matter.

If you have any questions, please contact me at 301-415-2020.

Sincerely, Original signed by:

Brenda L. Mozafari, Project Manager, Section 1 l Project Directorate ill f Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-331 cc: See next page DISTRIBUTION Docket File PUBLIC Zwolinski/SBlack OGC i ACRS GGrant, Rll!

CCraig/CThomas a KKavanagh, SPLB l GHubbard, SPLB  !

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DOCUMENT NAME: G:\PDill 1\DUANEARN\GL9704ltr.wpd l

OFFICE PM:LPD3 C LA:LPD3 l C SC:LPD3 , _ C NAME BMozafarQf84-iiBarnhill 6% CCraig1[ l DATE 7/ /P/99' 7/ / > /99 7/[ 3 /99 i OFFICIAL RECORD COPY i

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Eliot Protsch July 13, 1999 This letter documents the completion of our activity on TAC No. M99987. We appreciate your efforts with regard to this matter.

i If you have any questions, please contact me at 301-415-2020. l Sincerely, i 1

Original signed by:

Brenda L. Mozafari, Project Manager, Section 1 Project Directorate 111 Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-331 cc: See next page DISTRIBUTION Docket File PUBLIC Zwolinski/SBlack OGC ACRS GGrant, Rlli l CCraig/CThomas KKavanagh, SPLB GHubbard, SPLB DOCUMENT NAME: G:\PDill-1\DUANEARN\GL97041tr.wpd OFFICE PM:LPD3 C LA:LPD3 C SC:LPD3 C NAME BMozafar@tBarnhill th- CCraig%(

DATE 7/ /P/99' 7/ / 3 -/99 7/1 3 /99 OFFICIAL RECORD COPY

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'. Mr. Eligt Protsch Duane Amold Energy Center l IES Utilities Inc.

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cc: '

Jack Newman, Esquire i

A' Gutterman, Esquire l

Morgen, Lewis, & Bockius i 1800 M Street, NW.

I Washington, DC 20036-5869 -

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Chairman, Linn County Board of Supervisors l

Cedar Rapids,IA 52406 l

lES Utilities Inc.

i ATTN: Gary Van Middlesworth Plant Superintendent, Nuclear 3277 DAEC Road Palo,IA 52324 John F. Franz, Jr.

Vice President, Nuclear  !

Duane Arnold Energy Center 3277 DAEC Road

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l Palo,IA 52324 j l

Ken Peveler

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Manager of Regulatory Performance Duane Arnold Energy Center 3277 DAEC Road Palo,IA 52324 U.S. Nuclear Regulatory Commission Resident inspector's Office Rural Route #1 Palo,IA 52324 Regional Administrator, Rill U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, IL 60532 4531 f

Parween Baig Utilities Division j lowa Department of Commerce l Lucas Office Building,5th floor )

Des Moines,IA 50319 1