ML20198A527
| ML20198A527 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 12/12/1997 |
| From: | Dick G NRC (Affiliation Not Assigned) |
| To: | Johnson I COMMONWEALTH EDISON CO. |
| References | |
| TAC-M98621, TAC-M98622, NUDOCS 9801060006 | |
| Download: ML20198A527 (3) | |
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- Ms; irene M. Johnson, Acting Manager:
4 Nuclear Regulatory Services Commonwealth Edison Company; Easoutive Towers West 111 1400 Opus Place, suite 500 :
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SUBJECT:
' INSTALLATION OF C&D CHARTER POWER SYSTEMS BATTERIES AT BYRON STATION (TAC NOS. M98621 AND M98622):_
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Dear Ms. Johnson:
- On November 25,1997, we issued Amendment No. 93 to the licenses for Byron, Units 1 and 2, approving the, Installation and use of the C&D Charter Power Systems, Inc. (C&D) batteries.
Based on the August 7,1997, Commonwealth Edison Company (Comed) submiital, our Safety Evaluation stated that "the C&D batteries were sized using an aging factor of 1.25 ar.d a design margin of 10 percent.". Subsequently, it was brought to our attention that in an October 24,;
1997, letter Comed stated that as a result of testing of C&D battery cells at the factory, the design margin now used to size the batteries is 5 percent.
As a result of our review of the October 24,~ 1997, letter and discussions with the Comed staff on December 2,1997, we have concluded that a design margin of 5 pen:ent for the C&D batteries at Byron Station is acceptable. This conclusion is based on the fact that the factory
- testing at the one-minute rate sup;xxis a design margin of betwean 5 percent and 10 percent t
and that the expected load growth on the batteries is small and is tracked and approved by 1
calculation by Comed before any additions can be implemented, We apologize for any inconveniences that this change may have caused.
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Sincerely, Original signed by -
1-gg. git.{. v g> py George F. Dick, Jr., Project Manager Project Directorate lil-2 05 Division of Reactor Projects - lilllV
- Office cf Nucleir Reactor Regulation Docket Nos. STN 50-454 and STN 50-455 g
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December 12, 1997 Ms, Irene M. Johnson, Acting Manager Nuclear Regulatory Services Commonwealth Edison (Mmpany Executive Towers Wev. 6 1400 Opus Place, Suite 500 Downers Grove,IL 60515
SUBJECT:
INSTALL.ATION OF C&D CHARTER POWER SYSTEMS BATTERIES AT BYRON STATION (TAC NOS. M98621 AND M98622)
Dear Ms. Johnson:
Oi1 Nov6mber 25,1997, we issued Amendment No. 93 to the licenses for Byron, Units 1 and 2, approving the installation and use of the CSD Charter Power Systems, Inc. (C&D).4stteries.
Based on the August 7,1997, Commonwealth Edison Company (Comed) submittui, our Safety Evaluation stated that "the C&D batteries were sized using an aging factor of 1.25 and a design margin of 10 percent." Subsequently, it was brought to our attention that in an October 24, 1997, letter Comed stated that as a result of testing of C&D battery cells at the factory, the design margin now used to site the batteries is 5 percent.
As a result of our review of the October 24,1997, letter and discussions with the Comed staff on December 2,1997, we have concluded that a design margin of 5 percent for the C&D batteries at B;ron Station is : acceptable. This conclusion is based on the fact that the factory testing at the one-minute rate supports a design margin of between 5 percent and 10 percent 4
and that the expected load growth on the batteries is small and is tracked and approved by calculation by Comed before any additions can be implemented.
We apologize for any inconveniences that this change may have cau.ed.
Sincerely, A
Geo F. Dick, Jr., Project Manager Project Directorate ill-2 Division of Raactor Projects - lil/IV Office of Nuclear Reactor Regulation Docket Nos. STN 50-454 and STN 50-455 cc: See next page n
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- 1. Johnson Byron Station Commonwealth Edison Company Unit Nos.- 1 and 2 oc:
s Meheel 1. Miller, Esquire Chairman, Ogle County Board Sidley and Austin Post Office Box 357 One First National Plaza Oregon,it!nois 61061 Chicago,IHinois 60603 Mrs. Phillip B. Johnson Regional Administrator, Region lli.
.1907 Stratford Lane U.S. Nucdear Regulatory Commission Rockford, Illinois 61107 601 Warrenville Road
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Lisle INinois 60532-4351 Attomey General -
3 500 South Second Street Illinois Department of Nuclear Safety Springfield, Illinois 62701 Office of Nuclear Facility Safety 1035 Outer Park Drive CommonweaNh Edison Company Springfield, Illinois 62704 Byron Station Manager 4450 North German Church Road Document Control Desk-Licensing Byron, Illinois 61010 Commonwealth Edison Company 1400 Opus Place, Suite 400 Commonwealth Edison Company i
Downers Grove, Illinois 60515 Site Vice President-Byron 4450 N. German Church Road Mr. William P. Poitier, Director Byron, Illinois 61010 Westinghouse Electric Corporation Energy Systems Business Unit
. Post Office Box 355, Bay 236 West Pittsburgh, Pennsylvania 15230 Joseph Gallo Gallo & Ross 1250 Eye St., N.W., Suite 302 Washington, DC 20005 Howard A. Leamer Environmentallaw and Policy Center of the Medwest 203 North LaSalle Street
. Suite 1390 Chicago, Illinois 60601 U.S. Nuclear Regulatory Commission Byron Resident inspectors Office -
4448 North German Church Road Byron, Illinois 61010 9750 Ms. Lorraine Creek Rt.1, Box 182 Manteno, Illinois.60950
.