ML20126H902

Notifies That NRC Completed Review of Adequacy of Station Electric Distribution Sys Voltages.Concludes Analyses Acceptable.Safety Evaluation Encl

ML20126H902
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	04/09/1981
From:	Varga S Office of Nuclear Reactor Regulation
To:	Abel J COMMONWEALTH EDISON CO.
Shared Package
ML20126H907	List: ML20126H902 ML20126H910
References
NUDOCS 8104220393
Download: ML20126H902 (2)

Text

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i MOR ORIGINAL-  !

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and 50-304 ORB #1 Rdg DEisenhut b

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Mr. J. S. Abel ACRS-10

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Director of Nuclear Licensing Svarga Comonwealth Edison t.ompany. DWigginton 3 < % l g% %A g ,t- l Post Office Box 767 CParrish 'D-Chicago, Illinois 60690 G ile egg \ ;q \,

Dear Mr. Abel:

The Comission has completed the review of the adequacy of the station electfic distribution system voltages for the Zdon Station, Unit Mos.  ;

1 and 2. '

t In our Safety Evaluation ac;crt, which is enclosed, we have concluded  !

that the Comonwealth Edison Compaay (CECO) has provided voltage ana- i lyses to demonstrste that the Class 1E ccuipnent teminal voltages remain within acceptabic. cperating limits f:r the postulated worst case candi-  !

tions, the t2sts used to verify the analyses was valid and shoved the  !

analyses to be accurata, and Ceco's reaffirmation of compliance with  ;

General Design Criteria 17 requirenents is acceptable. With this, we '

consider this issue for the Zion Station to be complete, i Sincerely,  !

Drisinal signea by.1  ;

S. A. Varsa  :

Steven A. Varga, Chief i Operating Reactors Branch #1 i Division of Licensing j

Enclosure:

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NRC Safety Evaluation Report and  :

EGEG~ Reports EGG-EA-5305 and 5306 on Zion Units 1 and 2  !

respectively 1

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DISTRIBUTION:

Dockets NRC PDR L PDR TERA NSIC ORB #1 Rdg Docket Nos. 50-295 and 50-304 DEisenhut , t 0 ELD IE-3 ACRS-10 Mr. J. S. Abel SVarga Director of Nuclear Licensing DWigginton .

Comonwealth Edison Company CParrish Post Office Box 767 Gray File ,

Chicago, Illinois 60690 -

Dear Mr. Abel:

The Comission has completed the review of the adequacy of the station electric distribution system voltages for the Zion Station, Unit Mos.

l 1 and 2. t In our Safety Evaluation Report, which is enclosed, we have concluded  !

that the Comonwealth Edison Company (CECO) has provided voltage ana-lyses to demonstrate that the Class IE equipment thermal voltages remain within acceptable operating limits for the postulated worst case condi-  ;

tions, the tests used to verify the analyses was valid and showed the  ;

analyses to be accurate, and CECO's reaffirmation of compliance with General Design Criteria 17 requirements is acceptable. With this, we consider this issue for the Zion Station to be complete. l Sincerely, l l

Steven A. Varga, Chief l Operating Reactors Branch #1  ;

Division of Licensing  ;

Enclosure:

NRC Safety Evaluatddn Report and  :

EG&G Reports EGG-EA-5305 and '

5306 on Zion Units 1 and 2 respeetively l cc: w/ enclosure .

See next page

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• April 9,1981 Docket Nos. 50-295 '

and 50-304 Mr. J. G. Abel Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690

Dear Mr. Abel:

The Comission has completed the review of the adequacy of the station electric distribution system voltages for the Zion Station, Unit Nos.

I and 2.

In our Safety Evaluaticn Report, which is enclosed, we have concluded that the Ccmonwealth Edison Company (Ceco) has provided voltage ana-lyses to demonstrate that the Class 1E equipment terminal voltages remain within acceptable operating limits for the postulated worst case condi-tions, the tests used to verify the analyses was valid and showed the analyses to be accu" ate, and CECO's reaffirr.ation of compliance with General Design Criteria 17 requirements is acceptable. With this, we consider this issue for the Zion Station to be complete.

Sincerely, .

en rga, hi Operating Reactors'St'anch #1 Division of Licensing

Enclosure:

NRC Safety Evaluation Report and EG&G Reports EGG-EA-5305 and 5306 on Zion Units 1 and 2 respectively cc: w/ enclosure See next page l

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. J. S. Abel <

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..::nr ealth Edison Company i

R:bert J. Vollen, Esquire 109 N:rth Dearborn Street Chicago, Illinois 60602 Dr. Cecil Lue-Hing Director of Research and Develcpment ,

Metropolitan Sanitary District ,

cf Greater Chicago 100 East Erie Street Chicago, Illinois 60611 Zion-Benten Public Library District 2500 Ernaus Avenue Zion, Illinois 60099 Mr. Phillip P. Ste; tee Isham, Lincoln and Eeale 4

C:unselcrs at Law One First Nati:nal Pla:a' l 42nd Floor Chica;c, Illinois 6C603 ,

- Susan N. Sekuler, Esquire Assistant A:terney General Envir:nmental Control Division 136 Wes: Randolph Street, Suite 2315 Chi:ago, Illinois 60601 U. S. Nuclear Regulatory Ccm.m ission Resident Inspectors Office ,~

105 Shiloh Blvd.

Zion, Illinois 60099 l

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