ML19352A136
| ML19352A136 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 03/04/1981 |
| From: | Tramm T COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 1093B, NUDOCS 8103110409 | |
| Download: ML19352A136 (3) | |
Text
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O ona First National Plaza. Chicago. lilinois Comm:nw:cith Edison Accress Reply to: Post Office Box 767 Chicago. Illinois 60690 March 4, 1981 Mr. Harold R.
Denton, Director Of fice of Nuclear Reactor Regulation U.S.
Nuclear Regulatory Commission Washington, DC 20555
Subject:
Braidwood Station Units 1 and 2 Byron Station Units 1 and 2 Seismic Analysis NRC Occket Nos. 50-454/455 and 50-456/457
Dear Mr. Denton:
Attached is a corrected version of summary slide JW/0Z-12 which was used in our presentation on seismic reanalysis of Byron and Braidwood Stations at a meeting in Bethesca, Maryland, on February 18, 1981.
Please arrange for distribution of this corrected slide to recipients of the NRC's meeting summary.
Please address any questions to this office.
Very truly yours, e
T. R.
Tramm Nuclear Licensing Administrator Pressurized Water Reactors t
8108110ilei A
10938
SUMMARY
THE PRESENT B/B DESIGN IS BASED ON THE 1974 NRC SEISMIC CRITERIA AND MEETS THE CP REQUIREMENTS.
DECONVOLUTION WAS REVIEWED AGAIN IN DECEMBER 1976 AND WAS FOUND ACCEPTABLE BY THE NRC STAFF.
IN MAY 1979 WHEN NRC CHANGED THEIR POSITION ON DECONVOLUTION, THE PLANT' CONSTRUCTION WAS COMPLETE AND ANY RESULTING FIELD CHANGES SHOULD BE TREATED AS BACKFIT REQUIREMENTS.
TO FORCE' CECO'T0'BACKFIT TO THE MORE CONSERVATIVE ASPECTS OF THE 1974 AND THE 1980= CRITERIA WILL IMPOSE UNDUE HARDSHIP.
ANTIC'IPATED THREE YEAR DELAY IN PLANT OPERATING DATE AT A COST OF 675 MILLION D0LLARS DUE TO THE INCREMENTAL COST OF REPLACEMENT ENERGY AND
-THE ADDITIONAL RETURN ON CAPITAL.FOR' CONSTRUCTION WORK-IN PROGRESS INCLUDING ESCALATION ON DEFERRED EXPEDITURES.
THIS COST IS FOR BYRON UNIT l'ONLY AND DOES NOT INCLUDE COSTS FOR ENGINEERING, FOR CONSTRUCTION REWORK OR-FOR ADDITIONAL OR REVISED EQUIPMENT AND MATERIALS.
THIS-COST DOES NOT INCREASE THE PRESENT HIGH LEVEL OF SAFETY INHERENT IN 0VR: PRESENT BYRON /BRAIDWOOD PLANTS DESIGN.
MARCH 2,.1981 REV. l JW/0Z-12 09958
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