ML20044C374
| ML20044C374 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 03/17/1993 |
| From: | Shiraki C Office of Nuclear Reactor Regulation |
| To: | Kovach T COMMONWEALTH EDISON CO. |
| Shared Package | |
| ML20044C375 | List: |
| References | |
| TAC-M82603, TAC-M82604, NUDOCS 9303220370 | |
| Download: ML20044C374 (3) | |
Text
.
March 17.1993 Docket Nos. 50-295 DISTRIBUTION:
and 50-304 PDIII-2 r/f J. Roe J. Zwolinski J. Dyer Mr. Thomas J. Kovach C. Moore C. Shiraki i
Nuclear Licensing Manager 0GC ACRS (10) i Commonwealth Edison Company-Suite 300 B. Clayton RIII NRC & Local PDRs OPUS West III K. Bohrer Docket File 1400 OPUS P1 ace Downers Grove, Illinois 60515
Dear Mr. Kovach:
SUBJECT:
ZION NUCLEAR POWER STATION, UNITS 1 AND 2, TOPICAL REPORT SUPPLEMENT
("
NFSR-0087 TO TOPICAL REPORT NFSR-0069 (TAC NOS. M82603 AND M82604)
In a letter dated March 4,1991, you submitted the subject supplement (NFSR--
0087, Revision 0) to Topical Report NFSR-0069, Revision 0.
NFSR-0069, entitled, " Transient Analysis Envelope for Zion Units 1 and 2, dated November 8,1989, reflects use of the Westinghouse Standard Thermal Design Procedure (STDP) for the analyses of departure from nucleate boiling (DNB) limiting transients. The supplemental report presents sample calculations performed to demonstrate the applicability to Zion of an upgraded methodology known as the Westinghouse Revised Thermal Design Procedure (RTOP). This methodology will replace the STDP for use in the analyses of DNB limiting transients and was approved by the staff in Topical Report WCAP-11397-A dated April 1989.
The staff has reviewed NFSR-0087 and finds that you have acceptably demonstrated application of the Westinghouse RTDP methodology as well as -the methodology for calculating OT-delta T and OP-delta T setpoints for use at Zion. Topical Report NFSR-0087, Revision 0, may, therefore, be referenced in future licensing analyses, pending staff approval of NFSR-0069, Revision 0.
The staff's Safety Evaluation is enclosed.
If you have any questions, please contact me.
Sincerely, OfghalSirn?d Ev:
Clyde Y. Shiraki, Senior Project Manager Project Directorate III-2 9303220370 930317 Division of Reactor Projects - III/IV/V hDR ADOCK 0500 5
Office of Nuclear Reactor Regulation
Enclosure:
Safety Evaluation e
i I
cc w/ enclosure:
See next page m, s 2; 7 190028 EE
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March 17. 1993 i
Docket Nos. 50-295 DISTRIBUTION:
and 50-304 PDIII-2 r/f J. Roe J. Zwolinski J. Dyer Mr. Thomas J. Kovach C. Moore C. Shiraki Nuclear Licensing Manager 0GC ACRS (10)
Commonwealth Edison Company-Suite 300 B. Clayton RIII NRC & Local PDRs OPUS West III K. Bohrer Docket file 1400 OPUS Place Downers Grove, Illinois 60515
Dear Mr. Kovach:
SUBJECT:
ZION NUCLEAR POWER STATION, UNITS 1 AND 2, TOPICAL REPORT SUPPLEMENT NFSR-0087 TO TOPICAL REPORT NFSR-0069 (TAC NOS. M82603 AND M82604)
In a letter dated March 4, 1991, you submitted the subject supplement (NFSR-0087, Revision 0) to Topical Report NFSR-0069, Revision 0.
NFSR-0069, entitled, " Transient Analysis Envelope for Zion Units 1 and 2," dated November 8,1989, reflects use of the Westinghouse Standard Thermal Design Procedure (STDP) for the analyses of departure from nucleate boiling-(DNB) limiting transients. The supplemental report presents sample calculations performed to demonstrate the applicability to Zion of an upgraded niethodology known as the Westinghouse Revised Thermal Design Procedure (RTDP). This methodology will replace the STDP for use in the analyses of DNB limiting transients and was approved by the staff in Topical Report WCAP-ll397-A dated April 1989.
The staff has reviewed NFSR-0087 and finds that you have acceptably demonstrated application of the Westinghouse RTDP methodology as well as the methodology for calculating OT-delta T and OP-delta T setpoints for use at Zion. Topical Report NFSR-0087, Revision 0, may, therefore, be referenced in future licensing analyses, pending staff approval of NFSR-0069, Revision 0.
The staff's Safety Evaluation is enclosed.
If you have any questions, please contact me.
Sincerely, gy r.. s e,
Clyde Y. Shiraki, Senior Project Manager Project Directorate III-2 Division of Reactor Projects - III/IV/V Office of Nuclear Reactor Regulation
Enclosure:
Safety Evaluation cc w/ enclosure:
See next page 2
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AL Mr. Thomas J._ Kovach Zion Nuclear Power Station' Commonwealth Edison Company Unit Nos' ] and 2 CC+-
Michael. I. Miller, Esquire Sidley'and' Austin One First National Plaza Chicago, Illinois 60690 Dr. Cecil.Lue-Hing Director of Research and Development Metropolitan Sanitary District of Greater Chicago.
100 East Erie Street _
Chicago, Illinois 60611 Phillip Steptoe, Esquire Sidley and Austin
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One First National Plaza Chicago, Illinois 60603 Mayor of Zion Zion, Illinois 60099 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety i
1035 Outer Park Drive Springfield, Illinois 62704 U.-S. Nuclear Regulatory Commission Resident-Inspectors Office-105 Shiloh Blvd.
Zion, Illinois 60099 Regional Administrator, Region III U. S. Nuclear _ Regulatory Commission 799 Roosevelt Road, Bldg. #4 Glen Ellyn, Illinois 60137 Robert Neumann L!
Office of Public ' Counsel 1
State of Illinois Center 100 W. Randolph i
Suite 11-300 Chicago, Illinois 60601 b
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