ML20129F635

Forwards Request for Addl Info Re Control Complex Heating, Ventilating & Air Conditioning Sys at Plant,Unit 2

ML20129F635
Person / Time
Site:	Fermi
Issue date:	10/25/1996
From:	Kugler A NRC (Affiliation Not Assigned)
To:	Gipson D DETROIT EDISON CO.
References
NUDOCS 9610290176
Download: ML20129F635 (3)

Text

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4 Mr. Douglas R. Gipson October 25, 1996 Senior Vice President Nuclear Generation Detroit Edison Company 6400 North Dixie Highway Newport, Michigan 48166 i

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE CONTROL COMPLEX HEATING, VENTILATING, AND AIR CONDITIONING SYSTEM AT FERMI 2

Dear Mr. Gipson:

On September 13,,1996, Detroit Edison submitted the Summary Status Report for the Fermi 2 control complex heating, ventilating, and air conditioning (CCHVAC) system duct and duct support structural qualification activities for NRC staff review. Additional information, as discussed in the enclosure, is 1

. requested in order for the staff to complete its review. We request that you respond within 30 days.

If you have any questions concerning this request, please contact me at (301) 415-2828.

$ hcerely, Original signed by: Linda Gundrum for Andrew J. Kugler, Project Manager Project Directorate 111-1 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation Docket No. 50-341

Enclosure:

As stated cc w/ encl: See next page

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Mr. Douglas R. Gipson Fermi-2 Detroit Edison Company CC*

John Flynn, Esquire Senior Attorney Detroit Edison Company

. 2000 Second Avenue Detroit, Michigan 48226 Drinking Water and Radiological Protection Division Michigan Department of I Environmental Quality 3423 N. Martin Luther King Jr Blvd P. O. Box 30630 CPH Mailroom

. Lansing, Michigan 48909-8130 U.S. Nuclear Regulatory Commission j Resident Inspector's Office 6450 W. Dixie Highway )

Newport, Michigan 48166 l l

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

Lisle, Illinois 60532-4351 Peter W. Smith Director, Nuclear Licensing Detroit Edison Company Fermi 270 TAC 6400 North Dixie Highway Newport, Michigan 48166 Sepumber 1996

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REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE CONTROL COMPLEX HEATING, VENTILATING, AND

, AIR CONDITIONING SYSTEM AT FERMI 2 i

Provide the following information for NRC staff review:

1. the detailed evaluation and results of the reanalysis of the highest stressed ducts in systems previous NRC Concern No. 3(),843-3, 4316-1, 4316-6, and 4316-7 (reference

2. the detailed evaluation and results for the 20x16 duct in system 2849-1

and th 7x24 duct in system 2848-1-1B discussed in previous NRC Concern No. 15

} 3.

j the detailed Concern ey)aluation of duct system 2850-2 (reference previous NRC No. 18 ,

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4. a detailed summary of the three-dimensional finite element large displacement analyses of straight rectangular duct segment and

transition segments under internal pressure, and

5. a detailed description of all structural modifications required to meet the criteria of the CCHVAC structural qualification evaluations.

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' The referenced concerns were provided in the Safety Evaluation in the i December 7,1995, letter from Tiraothy Colburn to Mr. Douglas R. Gipson. l ENCLOSURE 1