ML20203F691

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Discusses Completion of Licensing Action for Bulletin 96-03, Potential Plugging of Emergency Core Cooling Suction Strainers by Debris in Boiling-Water Reactors,
ML20203F691
Person / Time
Site: Fermi DTE Energy icon.png
Issue date: 02/10/1999
From: Kugler A
NRC (Affiliation Not Assigned)
To: Gipson D
DETROIT EDISON CO.
References
IEB-96-003, IEB-96-3, TAC-M96145, NUDOCS 9902180259
Download: ML20203F691 (3)


Text

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%, February 10, 1999 Mr. Douglas R. Gipson Senior Vice President Nuclear Generation Detroit Edison Company 6400 North Dixie Highway Newport, MI 48166

SUBJECT:

COMPLETION OF LICENSING ACTION FOR BULLETIN 96-03," POTENTIAL PLUGGING OF EMERGENCY CORE COOLING SUCTION STRAINERS BY DEBRIS IN BOILING-WATER REACTORS," DATED MAY 6,1996 - FERMI 2 (TAC NO. M96145 )

Dear Mr. Gipson:

On May 6,1996, the U.S. Nuclear Regulatory Commission (NRC) issued Bulletin (BL) 96-03 to all holders of operating licenses or construction permits for boiling-water reactors. The NRC issued BL 96-03 to ensure that the emergency core cooling systems (ECCS) in boiling water reactors can perform their intended safety function to mitigate the effects of a postulated loss-of-coolant accident. The bulletin provided three options for resolving this issue including (1) installation of large-capacity passive strainers, (2) installation of self-cleaning strainers, er (3) installation of a backflush system. 3 In BL 96-03, the NRC staff specifically requested that licensees submit the following reports for each of their facilities:

1. A description of planned actions and mitigative strategies used, the schedule for implementation, and proposed technical specifications, if appropriate.
2. A report confirming completion and summarizing the actions taken.

In response to BL 96-03, you provided a letter dated November 1,1996, for Fermi 2. You stated that you planned to install!arge-capacity passive strainers which would be designed using the guidance in the Boiling Water Reactors Owners Group Utility Resolution Guidance (URG). The staff reviewed the URG and issued a safety evaluation on August 20,1998. By letter dated November 13,1998, you informed the staff that you had completed all actions requested by the bulletin. These actions included installation of large-capacity passive strainers for the residual heat removal and core spray systems, replacement of insulation at 102 pipe whip restraint

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locations, addition of preventive maintenance activities, and procedural measures to ensure adequate cleanliness in the suppression pool.

The staff has reviewed your response and has determined that the actions taken should minimize the potential for clogging of ECCS suction strainers and ensure the capability of the ,, g\

ECCS to provide long-term cooling following a loss-of-coolant-accident as required by 10 CFR 50.46. The staff notes that General Electric's Licensing Topical Report NEDC-3272

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99051I36259 990210 PDR ADOCK 05000341

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r D. Gipson February 10, 1999

" Application Methodology for GE Stacked Disk Suction Strainer"is still undergoing staff review.

Part I of the staff's safety evaluation of the topical report was issued on February 3,1999, apprrving GE's methodology for determining strainer head loss. However, the GE methodology for calculating strainer and associated penetration structural loadings due to hydrodynamic forces is still under staff review. Part 11 of the staff's safety evaluation will be issued upon completion of this review. Because the staff considers your actions responsive to the concems raised in BL 96-03 and no plant-specific concems have been identified, BL 96-03 is closed for your facility. Detailed reviews of your strainer design and 10 CFR 50.59 evaluation may be performed on a plant-specific basis in the future.

If you have any questions regarding this matter, please contact me at 301-415-2828.

Sincerely, ORIGINAL SIGNED BY Andrew J. Kugler, Project Manager Project Directorate ill-1 Division of Reactor Projects - lil/IV Office of Nuclear Reactor Regulation Docket No. 50-341 cc: See next page i

DISTRIBUTION:

Docket File PUBLIC PD31 Reading File OGC ,

ACRS I D. Skay l R. Elliott l 1

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OFFICE PM:PD31 E LA:PD31 cQ E C:SCSB ( D:PD31 7 NAME AKugler:db d40 CJamersod d.# CBerlinger CACarpenterCA )

DATE 02/ 9 /99 V 02/ l /99' 02/ (0 /99 02/ /O /99 OFFICIAL RECORD COPY I

l Mr. Douglas R. Gipson i Fermi 2 Detroit Edison Company l l

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cc: l l

. John Flynn, Esquire l l

Senior Attorney 1 Detroit Edison Company i 2000 Second Avenue i Detroit, Michigan 48226 I'

Drinking Water and Radiological Protection Division  !

Michigan Department of Environmental Quality 3423 N. Martin Luther King Jr Blvd ,

P. O. Box 30630 CPH Mailroom '

L Lansing, Michigan 48909-8130 <

! U.S. Nuclear Regulatory Commission -

l- Resident inspector's Office .

l 6450 W. Dixie Highway I

' Newport, Michigan 48166 l Monroe County Emergency Management Division l 963 South Raisinville Monroe, Michigan 48161 Regional Administrator, Region lil U.S. Nuclear Regulatory Commission 801 Warrenville Road

Lisle, Illinois 60532-4351 L

Norman K. Peterson Director, Nuclear Licensing Detroit Edison Company  ;

Fermi 2 - 280 TAC  !

6400 North Dixie Highway I Newport, Michigan 48166 J Decomter1998

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