ML20071E540
| ML20071E540 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 03/11/1983 |
| From: | Tramm T COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8303150275 | |
| Download: ML20071E540 (2) | |
Text
C 'N Commonwealth Edison
/,One First Nrtional Plus, Chicago lilinojs C
'J Address Reply to: Post Office Box 767 (j. Chicago, Illinois 60690 March 11, 1983 Mr. Harold R.
Denton, Director Office of Nuclear Reactor Regulation U.S.
Nuclear Regulatory Commission Washington, D.C.
20555 Re:
Byron Generating Station Units 1 and 2 Site Hydrology NRC Docket Nos. 50-454 and 50-455
Dear Mr. Denton:
This is to notify you of an apparent error in the FSAR analysis of accidental releases of radioactive liquids to groundwater at the Byron Station site.
This preliminary notice is being provided to alert you to forthcoming FSAR l
changes which could alter the NRC's analyses of accidental releases.
As a result of a re-evaluation of the two pump tests for the Galena Platteville aquifer referenced on page 2.4-31 of the Byron /Braidwood FSAR, the ungrouted rock transmissivity values should be an order of magnitude higher.
Higher transmissivities are also supported by published literature values for the same aquifer in northern Illinois.
To further verify the applicability of the re-evaluated transmissivities, other test results describing the hydraulic conductivity of the aquifer are being reviewed.
Appropriate changes to the Byron /Braidwood FSAR will be provided as soon as possible.
It is expected that this will take about a week.
Very truly yours,
- k. fNW T.
R.
Tramm TRT:mbn cc:
Service list (attached) l 8303150275 830311 PDR ADOCK 05000454 A
~
A SERVICE LIST COMMONWEALTH EDISON COMPANY -- Byron Station Docket Nos. 50-454 and 50-455 Mr. Ivan W.
Smith Secretary Administrative Judge and Chairman Attn:
Chief, Docketing and Atomic Safety and Licensing Service Section Board Panel U.S. Nuclear Regulatory Commission Room 428 Washington, D.C.
20555 East West / West Towers Bldg.
4350 East West Highway Ms. Betty Johnson Bethesda, MD 20114 1907 Stratford Lane Rockford, Illinois 61107 Dr. Richard F. Cole Atomic Safety and Licensing Ms. Diane Chavez Board Panel SAFE U.S. Nuclear Regulatory Commission 326 North Avon Street Washington, D.C.
-20555 Rockford, Illinois 61103 Atomic Safety and Licensing Dr. Bruce von Zellen Board Panel Department of Biological Sciences U.S. Nuclear Regulatory Commission Northern Illinois University Washington, D.C.
20555 DeKalb, Illinois 60115 Chief Hearing Counsel Joseph Gallo, Esq.
Office of the Executive Isham, Lincoln & Beale Legal Director Suite 840 U.S. Nuclear Regulatory Commission 1120 Connecticut Ave.,
N.W.
Washington, D.C.
20555 Washington, D.C.
20036 Dr. A Dixon Callihan Douglass W.
Cassel, Jr.
Union Carbide Corporation Jane Whicher P.O. Box Y BPI Oak Ridge, Tennessee 37830 Suite 1300 109 N.
Dearborn Mr. Steven C. Goldberg Chicago, IL 60602 Ms. Mitzi A.
Young Office of the Executive Legal Ms. Patricia Morrison Director 5568 Thunderidge Drive U.S. Nuclear Regulatory Commission Rockford, Illinois 61107 Washington, D.C.
20555 Mr. David Thomcs Atomic Safety and Licensing 77 South Wacker Appeal Board Panel Chicago, IL 60621 U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Via U.S. Mail Via Express Mail Via Messenger
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