ML20207H548

Forwards SER Re Corrective Action for Emergency Diesel Generators.Concerns Expressed Re Special Visual Bearing Insp & Need for Gap Check Insp of Main Bearings After Each Automatic Dry Start.Responses Re Commitments Requested

ML20207H548
Person / Time
Site:	Fermi
Issue date:	07/16/1986
From:	Adensam E Office of Nuclear Reactor Regulation
To:	Sylvia B DETROIT EDISON CO.
Shared Package
ML20207H552	List: ML20207H548 ML20207H555
References
NUDOCS 8607240361
Download: ML20207H548 (3)

Text

m _ _

f July 16, 1986 D19RlliTION: .

6cket No. 50-341

)NRCPDR .

Docket No. 50-341 Local PDR ,

BWD-3 r/f EAdensam EHylton Mr. B. Ralph Sylvia DLynch Group Vice President - Nuclear Operations LGHulman 's Detroit Edison Company RBernero 6400 North Dixie Highway Attorney, OGC Newport, Michigan 48166 JPartlow EJordan

Dear Mr. Sylvia:

BGrimes ACRS (10)

Subject:

Safety Evaluation of the Fermi-2 Emergency Diesel Generators (EDG)

The attached Safety Evaluation reflects the NRC staff's evaluation of-your correc-tive action regarding your emergency diesel generators. This is based, in part, on your submittal of March 18, 1986. Although we arc in agreenent that you have demonstrated that there is reasonable assurance that these diesels will function

• as a reliable onsite power source, we are not in complete accord with your pro-posed bearing inspection program. Specifically, to support our conclusions on demonstrated reliability, the special visual inspection of bearing No.13 on the..- '

upper crankline of EDG No. 13 must be performed within the "envelene of accept-ability" established by your Demonstration Test Program, because of the limited reliability of the gap check method. Your commitment, in your submittal of March 18, 1986, to conduct this special bearing inspection at the next 18-month s Technical Specification surveillance inspection is acceptable, provided the -

envelope of engine starts established by the Demonstration Test Program is not exceeded. In your letter of May 29, 1986, you propose to extend the 18-month Technical Specification interval to the first refueling outage. This, too, would be acceptable, provided the envelope of engine starts established by the Demon-stration Test Program is not exceeded. Although the special bearing inspection may be conducted at any time, it should be conducted when the number of engine starts is comparable to those in the Demonstration Test Program to be cons.idered within the envelope of the Demonstration Test Program.

Also, as no unprelubricated (i.e., " dry") starts were conducted during your Demonstration Test Program, we consider it necessary to conduct a gap check inspection of the main bearings after each automatic " dry" start to remain within the envelope of your Demonstration Test Program, i

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After reviewing our EDG evaluation, please provide your commitments to the staff positions indicated above, or provide additional justification for your revised commitment on the special visual inspection cited above, and on the feeler gauge inspection frequency following " dry" starts. If you have any questions on this matter, please contact M. D. Lynch, the Fermi-2 Project Manager, at (301) 492-9499.

Sincerely,

/S/

Elinor G. Adensam, Director RWR Project Directorate No. 3 Division of RWR Licensing

Enclosure:

Safety Evaluation of the Fermi-2 EDG's cc: See next page i

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i Mr. B. Ralph Sylvia D:troit Edison Company Fermi-2 Facility cc:

Pr. Harry H. Voigt. Esq. Ronald C. Callen LeRoeuf Lamb, Leiby & MacRae Adv. Plannino Review Section 1333 New Hampshire Avenue, N. W. Michigan Public Service Commission Washington, D. C. 20036 f,545 Mercantile Way P. O. Box 30221 iohn l Flynn, Esq. Lansing, Michigan 48909 Senior Attorney The Detroit Edison Connany Regional Administrator, Region III 9000 Second Avenue U. S. Nuclear Regulatory Commission Detroit, Michigan 48276 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Dennis R. Hahn, Chief Nuclear Facilities and Environmental Ponitorirsg Section Office Division of Radiological Health P. O. Box 30035 Lansino, Michigan 48909 Mr. Robert Woolley Actina Supervisor-Licensing The Octroit Edison Company Fermi Unit 2 6400 No. Dixie Highway Newport, Michigan 48166 Mr. Walt Pogers U. S. Nuclear Regulatory Commission Resident Inspector's Office 6450 W. Dixie Highway Newport, Michigan 48166 Monroe County Office of Civil Preparedness

$63 South Raisinville Monroe, Michigan 48161 O

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