ML17202L263
| ML17202L263 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities, LaSalle  |
| Issue date: | 06/05/1990 |
| From: | Eng P Office of Nuclear Reactor Regulation |
| To: | Kovach T COMMONWEALTH EDISON CO. |
| References | |
| IEB-90-002, IEB-90-2, TAC-76327, TAC-76328, TAC-76335, TAC-76336, TAC-76347, TAC-76348, NUDOCS 9006130271 | |
| Download: ML17202L263 (6) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 Docket Nos. 50-237, 50-249 50-254, 50-265 50-373' 50-374 Mr. Thomas J. Kovach Nuclear Licensing Manager-Corranonwealth Edison Company-Suite 300 OPUS West II I 1400 OPUS Place Downers Grove, Illinois 60515
Dear Mr. Kovach:
June 5, 1990
SUBJECT:
COMMONWEALTH EDISON RESPONSE TO NRC BULLETIN 90-02, "LOSS OF THERMAL MARGIN CAUSED BY CHANNEL BOX BOW," (TAC NOS. 76327, 76328, 76347, 76348, 76335, 76336)
By letter dated April 26, 1990, you.provided your response to NRC Bulletin 90-02, "Loss of Thermal Margin Caused by Channel Box Bow," for Dre*sden Station, Units 2 and 3; Quad Cities Station, Units 1 and 2; and LaSalle County Station, Units 1 and 2.
~Review of your response has resulted in our determihation that your* initial actions, as described for LaSalle County Station, Units 1 and 2 and Dresden, Unit 3,. conform to the requirements defined in the subject Bulletin.
Review of both the General Electrfc (GE) and Advanced Nucl~ar Fuels (ANF) methodologies are in progrels and are not expected to be complete until summer, 1990. These methodologies are only applicable to single bundle lifetime channels.
Concerns identified as a r~sult of our detailed review of the GE and ANF methodologies, if any, will be forwarded to you by separate correspondence.
Your actions with regards to Quad Cities Station, Units 1 and 2, are deemed acceptable because of the locatio~ of the two affected bundles in the core and the critical power ratio (CPR) margins available. For Dresden, Unit 2, your actions as described in Attachment B of your submittal are appropriate in that the assumed bowin~ is the maximum possible considering the actual narrow gap width for each of the three second bundle lifetime channel boxes used in the four bundle array modeled.
The four bundle array used in the analysis of the channel bow effect on thermal limits provides an appropriate limiting configura-tion.
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This completes our actions on TAC numbers
.an*d 76336.
76347, ~63~8, 76335,
- Should you have any* questions, please contact me.
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- RDudley DFieno Sincerely, Patricia L~ Erigi Project Manager Project Directorate III-*2.
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Mr. Thomas J~ Kovach This completes our actions on TAC numbers 76327, 76328, 76347~ 76348, 76335, and 76336.
Should you have any questions, please contact me.
cc: See next page Patricia L. Eng, Project Manager Project Directorate 111-2 Division of Reactor Projects - III, IV~ V and Special Projects Office of Nuclear.Reactor Regulation
Mr. Thomas J. Kovach Commonwealth Edison Company cc:
Michael I. Miller, Esq.
Sidley and Aust in One First National Plaza Chicago, Illinois 60690 Mr. J~ Eenigenburg Plant Superintendent Dresden Nuclear Power Station Rural Route #1 Morris, Illinois 60450 U. S. Nuclear Regulatory Commission Resident Inspectors Office Dresden Station Rural Route #1 Morris, Illinois 60450 Chairman Board of Supervisors of Grundy County Grundy County Courthouse Morris, Illinois 60450 Regional Administrator Nuclear. Regulat.ory Commission, Region III 799 Roosevelt Road, Bldg~ #4 Glen Ellyn, Illinois 60137 I 11 inoi s Department of Nuclear Safety Office of Nuclear Facility Safety
. 1035 Outer Park Drive Springfield, Illinois 62704 Robert Neumann
-Office of Public Counsel State of Illinois Center 100 W. Randolph Suite 11-300 Chicago, Illinois 60601 Dresden Nuclear Power Station Units 2 and 3
Mr. Thomas J. Kovach Commonwealth Edison Company cc:
Mr. Stephen E. Shelton Vice President Iowa-Illinois Gas and Electric Company P. 0. Box 4350 Davenport, Iowa 52808 Michael I. Miller, Esq.
- Sidley and Austin One First National Plaza Chicago, Illinois 60690 Mr. Richard Bax Station Manager Quad Cities Nuclear Power Station 22710 206th Avenue North Cordova,.Illinois 61242 Resident Inspector U~ S. Nuclear Regulatory Commission 22712 206th Avenue North Cordova, Illinois 61242 Chairman Rock Island County Board of Supervisors 1504 3rd Avenue Rock Island County Office Bldg.
Rock Island, Illinois 61201
.- Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Cuter Park Drive Springfield, Illinois.*62704
. Regior1al Administrator, Regfon* III
- U. S. Nuclear Regulatory Commission 799. Roosevelt Road, Bldg. #4 *
- Glen Ellyn, Illinois 60137 Robert Neumann Office of Public Counsel State of Illinois Center 100 W. Randolph Suite 11-300 Chicago, Illinois 60601 Quad Cities Nuclear Power Station Units 1 and 2
I Mr. Thomas J. Kovach Commonwealth Edison Company cc:
Phillip P. Steptoe, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60603 Assistant Attorney General 100 West Randolph Street
- Suite 12 Chicago, Illinois 60601 Resident Inspector/LaSalle, NPS U.S. Nuclear Regulatory Co1T1111ission Rural Route No. 1 P. 0. Bo~ 224 Marseilles, Illinois 61341
. Chairman LaSalle County Board of Supervisors UiSa lle County Courthouse Ottawa, Illinois 6~350 Attorney General 500 South 2nd Street*
Springfield, Illinois 62701 Chairman Illinois Connnerce Commission Leland Building
- 527 East Capitol Avenuj Springfield, Illinois 62706 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois 62704 Regional -Administrator, Region III U. S. Nuclear Regulatory Conunission 799 Roosevelt Road, Bldg. #4
. Glen Ellyn, Illinois 60137 Robert Neumann Office of Public Counsel State of Illinois Center 100 W. Randolph Suite 11-300 Chicago, Illinois 60601 LaSalle County Nuclear Power Station Units 1 & 2 Robert Cushing Chief, Public Utilities Division Illinois Attorney General's Office 100 West Randolph Street Chicago, Illinois 60601