ML19317H230

Comments on 721025 Des.Review of Fogging from once-through Cooling Sys Is Scientifically Elegant & Complete

ML19317H230
Person / Time
Site:	Arkansas Nuclear
Issue date:	11/28/1972
From:	Galler S COMMERCE, DEPT. OF
To:	Muller D US ATOMIC ENERGY COMMISSION (AEC)
References
6549, NUDOCS 8005010884
Download: ML19317H230 (3)

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50-313 November 28, 1972 Mr. Daniel R. Muller f o,

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Dear Mr. Muller:

s The draft environmental impact statement for " Arkansas Nuclear One Unit 1" which accompanied your letter of October 25, 1972, has been received by the Department of Comerce for review and coment.

The Department of Comerce has reviewed the draft environmental statement and has the following coments to offer for your consideration.

With respect to the meteorology, we find the statement, to-gether with Supplement Number 4 to the applicant's Environ-mental Report, to contain the most scientifically elegant and complete evaluation of fogging from a once through cooling system seen in this office.

Computer studies such as contained in Supplement 4 make our review efforts much easier and allow us to coment intelli-gently without going through laborious calculations.

We have stressed the importance of simulation modeling in previous comentaries and feel gratified that pcuer plant applicants may now be recognizing their value.

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• It is noted that the Arkansas Valley creates a channeling effect in summer, causing a roughly 65% frequency of winds with an easterly component.

This air passes over the extremely warm waters of Dardanelle Reservoir (maximum surface water temperatures 97.SoF) and probably results in high absolute humidities at the eastern shore of Lake Dardanelle.

It is therefore possible that although the matrices on pages C-89 and C-90 of Supplement 4 show no evidence of increased fogging in July when the reservoir is heated, it may be that precipitation patterns are significantly altered on the peninsula.

It is also possible that the mixing ratio variable in the computer simulation model is unrealistic during July.

Inasmuch as marine and estuarine organisms, anadromous fish, and inland commercial species are not likely to be significantly affected by construction and operation of the power plant, our comments are restricted to the radiological portions of the statement.

Specifically, we find that the radiological monitoring program is not described in sufficient detail, and that it does not specify whether or not aquatic vegetation and benthic animals will be included among the samples to be analyzed.

We are unable to evaluate the AEC staff's radiological dose values for routine and accidental emissions since the appro-3 priate relative concentrations in units of curies /m per curie /sec released and the meteorological assumptions used to determine them are not identified.

The only information we can find is the statement on page 5-25; namely, " average annual concentrations of radionuclides contained in the air and deposited on the ground are obtained with an atmospheric transport model (ref. 46-Meteorology and Atomic Energy-1968) incorporated in a computer program (ref. 47, ORNL-TM-3613-in preparation)."

No listing of such concentrations were found in the subject report.

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

Sincerely, iGi?

Sidney

. Galler Deputy Assistant Secretary for Environmental Affairs

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