ML19206B185
| ML19206B185 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Indian Point, Crane  |
| Issue date: | 05/27/1968 |
| From: | Shaw M US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Morris P US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19206B183 | List: |
| References | |
| NUDOCS 7905070676 | |
| Download: ML19206B185 (1) | |
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Cc:ments on 2
Oyster Creek Nuclear Station - Unit Jersey Central Power and Light Company Preliminary Safety Analysis Report Volu=es 1, 2 and 3 dated April 29, 1968 Prepared by Air Resources Environmental Laboratory Envirorsental Science Services Administration May 27, 1968 assumed dispersion ecnditions listed in Table 2-2 for the three Th2 are reasonably can servative as judged periods following an accicent The f ron the on-site meteorological data presented in the report.
relative di.ffusion calculations (X/Q) are also conservative for the 0-2 and 2.' hour perdeds and it is noted that the added dilution because of the building-induced turbulence amounted to a f actor effect For the 1-20 day period we believe there is c computational of abcut 3.5.
L on at the error ir the X/Q value and also, strictly speaking, the equa:
The distance, x, which appears in the top of page 2-5 is incorrect.
because of sector-averaged equation according to Gifford [1] comes about s, where s = x 6 and 3 is the sector an integration over the sector are, Thus, rather than increase x by an amount x', as was angle in radians.
donc ia the equation on page 2-5, the c: value should be taken at a distance of (x v x') rather than x.
Thus the equation should read (7./Q) av =
(E) (O) (1) (1
),
s x
a u
e: (at x v.')
In practice, however, there is very little difference in the X/Q values by the two methods. Using the equation, above, and the assumed dispersion frequengies in Table 2-2 we calculate an average 30-day X/Q sec/m3 at the site boundary of 427 meter s.
This is value of 1.1 x 10-3 about twice the value listed in Table 2-2 and would increase the thyrof.
doses shown in figures 14-63 and 14-64 from 9 to 20 rem and 320 to 720 rem, respectively.
References Gifford, F. A. (1960), " Atmospheric Dispersion Calculations Using
[1]
Generalized Gaussian Plume Model", Nuclear Saf ety, 2(2), eq. (7),
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