ML20236A371

Forwards Safety Evaluation Re Potential Hazard Due to Operation of Rockwood Stone,Inc Quarry.Nrc Satisfied That Hazards Insignificant.Reevaluation of Quarry Operation Required If Distance to Plant Becomes Less than 2 Miles

ML20236A371
Person / Time
Site:	Fermi
Issue date:	10/15/1987
From:	Stefano J Office of Nuclear Reactor Regulation
To:	Sylvia B DETROIT EDISON CO.
Shared Package
ML20236A375	List: ML20236A371 ML20236A398
References
TAC-65164, NUDOCS 8710220225
Download: ML20236A371 (3)

Text

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1. 'o UNITED STATES

! t- NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555

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October 15, 1987 l k.....

Docket No. 50-341 l Mr. 8. Ralph Sylvia Group Vice President f Nuclear Operations -

Detroit Edison Company .

6400 North Dixie Highway (

Newport, Michigan 48166

SUBJECT:

FERMI-2 SITE POTENTIAL HAZARDS DUE TO OPERATION OF THE NEARBY ROCKWOOD STONE, INC. QUARRY (TAC N0. 65164)

Detroit Edison [[letter::IA-86-512, Responds to FOIA Request.App Documents,Including NUREG-0020, NUREG-0030,NUREG-0090 & 691121 Rept to ACRS, Enrico Fermi Atomic Power Plant, Available in PDR|letter dated July 24, 1986]], submitted information regarding the operation of-the subject quarry, located about three miles north-northeast of L the Fermi-2 plant site. The information was submitted in response to concerns j expressed by the NRC relative to the potential effects of exploxives used at j the quarry on the safe operation of Fermi-2.

My letter to you dated February 27, 1987, informed of the NRC staff's review of the information provided by the July 24, 1986,' letter which concluded that operation of the quarry and the air blast effects on the Fermi-2 plant '

appeared to be insignificant with respect to potential ground motion at the plant site due to accidental explosion. It was requested however, that {'

7 Detroit Edison submit a confirmatory analysis of the postulated explosions to l demonstrate that the ground motion and hydrostatic pressure change hazards are insignificant in order to fully allay the staff's concerns relative to the l l effects of the quarry operation on the continued safe operation of the Fermi-2 l l

plant. The confirmatory analysis requested was provided by your letter dated l I

i April 20, 1987.

We have reviewed the confirmatory analysis provided by your letter dated April 20, 1987, and our Safety Evaluation is enclosed. On the basis of our review of those analytical results provided by Detroit Edison, and on our  !

independent evaluations we are satisfied that the hazards due to blast-induced overpressure, ground motion, and hydrostatic pressure changes are insignificant with respect to the Fermi-2 nuclear plant operation. As such, this matter is closed.

Although we consider this matter closed, we require that Detroit Edison I reevaluate the impact of the quarry operations on the safety of the plant if {

the distance from the Rockwood Quarry to the plant safety-related structures )

becomes less than two miles. ___

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8710220225 071015 PDR ADOCK 0 % p P

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Mr. Sylvia October 15, 1987 Your staff has been advised of these findings and have agreed to perform the reevaluation required should the distance between the quarry and the plant become less than two miles.

Sincerely, original signed by John J. Stefano, Project Manager Project Directorate III-1 Division of Reactor Projects - III, IV, V

& Special Projects

Enclosure:

As stated {

cc w/ enclosure:

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L -Mr. B. Ralph Sylvia

Detroit Edison Company' ' Fermi-2 Facility l-

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cc:

Mr. Harry H. Voigt, Esq. Mr. Ronald C. Callen LeBoeuf, Lamb, Leiby & MacRae Adv. Planning Review Section 1333 New Hampshire Avenue, N.W. Michigan Public Service Commission

, ' Washington, D.C. 20036- 6545 Mercantile Way l P. O. Box 30221 l

John Flynn,;Esq. Lansing,. Michigan 48909 Senior. Attorney .j Detroit Edison Company Regional Administrator, Region III '

2000 Second Avenue U.S. Nuclear Regulatory Commission-Detroit, Michigan 48226 799 Roosevelt Road Glen Ellyn, Illinois 60137 i Nuclear Facilities and Environmental Monitoring Section Office Division of Radiological Health P. O. Box 30035 -

Lansing, Michigan 48909 -) l Mr.-Steve Frost l Supervisor-Licensing Detroi. Edi.;on Company Fermi Unit 2 i I 6400 North Dixie Highway Newport, Michigan 48166 Mr. Thomas Randazzo Director, Regulatory. Affairs Detroit Edison Company i d

Fermi Unit 2 6400 North Dixie Highway Newport, Michigan 48166 Mr. Walt Rogers i U.S. Nuclear Regulatory Commission Resident Inspector's Office 6450 W. Dixie Highway l

-Newport, Michigan 48166  !

l Monroe County Office of Civil Preparedness 963 South Raisinville i Monroe, Michigan 48161 l l

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