ML20244C791

Comments on Niagara Mohawk Power Co First Suppl to Preliminary Hazards Summary Rept Nine Mile Point Nuclear Station Dtd Aug 1964

ML20244C791
Person / Time
Site:	Nine Mile Point
Issue date:	10/06/1964
From:	COMMERCE, DEPT. OF
To:
Shared Package
ML17055E652	List: IA-89-101, Informs of Completion of Review of Application by Niagara Mohawk Power Corp for Conversion of Util Provisional OL to full-term OL During ACRS 740905-07 Meeting.Concurs in Subj License Conversion IA-89-114, Confirms 740624 Meeting Re Author Review of Util SER & Concurrence Subj to Revs Discussed ML17055E651 ML17055E653 ML20244C683 ML20244C712 ML20244C715 ML20244C728 ML20244C740 ML20244C761 ML20244C768 ML20244C776 ML20244C791 ML20244C807 ML20244C810 ML20244C813 ML20244C816 ML20244C818 ML20244C821 ML20244C825 ML20244C827 ML20244D471 ML20244D475 ML20244D485 ML20244D499 ML20244D512 ML20244D553 ML20244D969 ML20244D979 ML20244D984 ML20244D995 ML20244E011 ML20244E026 ML20244E032 ML20244E123 ML20244E128 ML20244E141 ML20244E163 ML20244E184 ML20244E223 ML20244E231 ML20244E248 ML20244E270 ML20244E353 NUREG-1125, Final Response to FOIA Request for Documents.Forwards App a Documents.App a Documents Also Available in Pdr.Acrs Rept Subj to Request Published in NUREG-1125,Vol 2, Compilation of ACRS Repts
References
FOIA-89-101, FOIA-89-114 NUDOCS 8904200416
Download: ML20244C791 (1)

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Comments on

ii NIAGARA MOHAWK POWER C(BIPANY E N',

First Supplement to

[j jj Preliminary Hazards Summary Report Nine Mile Point Nuclear Station RECEIVED dated August 1964 ADVISORY COMMITTEE h

ON REAC R FEGUARDS i

Prepared by OCT 141984

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AM fi pg gavironmental Meteorological Research Branch 7,8,9,1011l2,1,2,3,4,5 6 ~

i Office of Meteorological Research 1

U. S. Weather Bureau k

.4 October 6, 1964 These _ comments are directed toward the meteorological aspects of the original Preliminary Hazards Summary Report as amended by this supplement. Our comments on the original report are dated May 20, 19',4.

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.t As stated in our previous comments the meteorological analysis is very compre-j hensive and is particularly useful in estimating atmospheric dilution rates in g

a wide variety of realistic meteorological conditions.

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As was suggested in our earlier comments the subdivision of sector D in the analysis of long' term concentrations resulted in an increase in the concentra-tions in sector DI. This was primarily due to the higher frequencies of wind i

direction in sector D1 as compared to D2, Considering all esctors the highest-

- monthly concentrations occur in the month of June in sector D1 and are about a factor of two higher than previously computed according to Tables A-8.4.1 and

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A-10.4.1 as compared to A-8.4 and A-10.4.

Thus for the nearest off-site l

population at about 3 km from the reactor tge highest monthly average concentra-(~ j 250-ftemissionheightwouldbe7.3x10"{curiespercubicmeterforaunit tion for a ground source would be 1.6 x 1 curies per cubic meters and for a source strength of I curie /sec.

It should be pointed out that the actual physical mode by which the effluent f

is diluted by the atmosphere may differ from the uncomplicated ground or

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elevated source. It may well be that the mode is by means of a fumigation I

situation where an elevated plume, which is initially affected by stable air from over the lake, is subsequently brought rather rapidly to the surface because of the heating from the land. This phenomenon could lead to relatively high peak concentrations over a small area. However, it is unlikely that these concentrations would consistently occur at the same azimuth and radial distance over a month. One, therefore, can consider the monthly values for the ground and elevated source as an upper and lower boundary of expected concentrations.

At"4S GTICE COPY DO NOT REO.2

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