ML20126C206
| ML20126C206 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 03/11/1976 |
| From: | Markee E Office of Nuclear Reactor Regulation |
| To: | Grimes B Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9212220420 | |
| Download: ML20126C206 (2) | |
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B. Grimes Chief
] O ~,LDJ Environmental Evaluation Branch, DDR METEOR 01DGICAL ASSISTANCE - TAR #0RS-2-210 (MONTICELLO)
In response to e request f rom your branch, we have evaluated the meteorological assumptions (#1 and #10) made by Northern States Power Company in the cask drop analysis for their Monticello
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plant. Based on the best onsite data which we have, we conclude that NSP's use of. the atmospheric conditions described in Regulatory i
Guide 1.3 will result in conservative I/Q values.-
i Therefore the following X/Q values, based on Regulatory Guide 1.3,.
f are appropriate for your analysis -
For Stack Releases (assumes -125m release):-
1 3
l Time Period-I/O (sec/m )
500m 1609m-0-1/2 hour-(fumigation)-
2.0-x 10-4 7.8 x 10-5-.
1/2-8 hours' 1.4 x 10-5 9,1 x 10-6 8-24 hours 1.4 x 10 '6.6 x 10 1-4 days-4.0 x 10-6 1.6 x 10-6 4-30 days 1.4 x 10-6 5.0 x 10-7' i
I For Ground Level Releases:
3 Eine Period I/O ~ (secle )
500m 1609m 0-8 hours 7.0 x 10-4 2.3 x-10~4 8-24 hours 1.6 x 10~4' 5.3 x 10-5 1-4 days 5.8.x 10-51
_1,9_,10 i 4-30 days 1.4 x 10-5~.
3,9 x 10-6' Original Signed by E M. Markee, Jr.
i Earl H. Markae',' Jr. - Leader -
L Meteorology Section:
Hydrology-Meteorology Branch.
Division of Site Safety and l
' Environmental' Analysis-p
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