ML19264C328

Comments on Draft Eis,Forwarded 811125.Discrepancies in Units Given for Hydraulic Conductivities & Transmissivity Should Be Clarified

ML19264C328
Person / Time
Site:	Byron
Issue date:	01/18/1982
From:	Blanchard B INTERIOR, DEPT. OF
To:	Youngblood B Office of Nuclear Reactor Regulation
References
ER-81-2502, NUDOCS 8201230032
Download: ML19264C328 (1)

Text

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5 United States Department of the Interior I

gj OFFICE OF THE SECRETARY

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20240 ER 1/2502 I

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B. J. Youngblood, Chief

/j Licensing Branch No.1 Division of Licensing 4 9-o Nuclear Regulatory Commission 2

a Washington, D.C. 20555 Ar D

Dear Mr. Youngblood:

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Thank you for your letter of November 25,1981, transmitting copies of the draft environmentalimpact statement related to the operating license stage of Byron Station, Units 1 and 2, Ogle County, Illinois. Our comments are presented according to the format of the statement or by subject.

Surface and Groundwater The hydraulic conductivities determined by tesjs in two domegic supply wells that 1,ap the Galena-Platteville dolomites are 2.21pd/m and 7.81pd/m. These units (1pd/m') are customarily used for the expression of the field coefficient of permeability, whereas hydraulic conductivity is expressed in meters per day (m/d). (See Lohman, S. W.,1972, Ground-water hydraulies: U.S. Geological Survey Professional Paper 708, p. 5). Because the ratio of hydraulic conductivity to the field coefficient of permeability is 1 to 7.48, the two characteristics differ considerably in numerical magnitude. Classification is needed as to which characteristic, hydraulic conductivity or field ec.cfficient of permeability, is meant on page 4-35.

Similarly, we believe that the units given for transmissivity in Section 5.3.1.2 may also be in error. The transmissivity is given as 13,650 liters per mp/d) ute per meter (lpm /m) whereas the customary units are square meters per day (m

. In this case the use of the units given on page 5-2 would indicate an unbelievable high transmissivity. These discrepancies should be clarified in the final statement.

Intake effects We rate in the section on Entrainment,"...when cooling tower consumptive demand exceeds 10% of the river flow, the applicant has committed to maintain a net withdrawal at a level acceptable to the Illinois Department of Conservation." Further that,"any additional mitigation will be determined by the applicant's operational monitoring programs, which include...(2) a special study to address the concerns of the Illinois Department of Conservation." These efforts should minimize adverse effects on the fish resources. We would appreciate the applicant keeping the Rock Island Field Office of the U.S. Fish and Wildlife Service informed of the monitoring activities and findings.

We hope these comments will be helpful to you in the preparation of a final statement.

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Sincerely, QQ A77Aca me2ir 5 urnjasf g

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< Bruce Blanchard, Director 8201:30032 820118 Environmental Project Review 05000454/

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