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Comments'on Pacific Ces and Electric' Company Application to Construct and Operate a Nuclear Reactor at Bodega Bay, California Prepared by Environmental Meteorological Research l'roject Office of Meteorological,Research U.S. Weather Bureau February 14i.1963 The emphasis th this report with regard to the release of fission products to
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free atmosphere is on cosiplete containment-(see page V11-1) and on a controlled release to the atmosphere via 'a stack.. %ssuming that the burden lof proof on con-
- 3 tainment is now placed'on evaluating the engineering'and c 1
that' lead to total containment th' ' role of the environment becomes a secondary
. Jating provisions-e consideration namely, that of evaluating and establishing permissil'1e stack emis-sion limits.
a small fraction of the permissible release rato and as'~a' con logical effects of the maximum credible operating accident and the design basis -
refueling accident are the controlling factors.
With the assumption that the stack discharge races given in Fig. VII-5'are reasonable, we are in~ agreement with the computed maximum dose rates under lapse conditions.-
However, under inversion-conditions there is a question in using a plume height above the ground of 200 ft at 3'm11es inland from the site, Hills at.these distances essentially form a.
barrier of about 600 ft. in height.
The behavior of plumes;in the vicinity of elevated gtvund is not well understood,.especiallylunder such conditices'as the
'f West Coast marine inversion. A recalculation of dose rates for the using zero stack height instead of 200 ft. gives dose rates 20 times higher.
ll Admittedly, this is probably'a pessimistic approach -but the problem needs f study.
urther behavior in the vicinity of elevated ground will include marin i
conditions.
i The on-site meteorological measurement program which is to start in the fall wil be particularly usefu1Lin determining wind versus stability statistics prove useful to have an additional. temperature measurement at sea -level as wellIt might j
as the three planned levels in the tower, whose base ~ appears to be 'about 60 ft above sea level.
3 the vicinity of higher. terrain under marine inversion c i
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order to determine permissible stack emission limits.
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< i Comments on Pacific Gas and Electric Company Application to Construct and Operate a Nuclear Reactor at Bodega Bay, California Prepared by Environmental Meteorological Research Project Office of Meteorological Research U.S. Weather Bureau February 14, 1963 The emphasis in this report with regard to the release of fission products to the free atmosphere is on complete containment (see page V11-1) and on a controlled release to the atmosphere via a stack. Assuming that the burden of proof on con-tainment is now placed on evaluating the engineering and operating provisions that lead to tota 1' containment the role of the environment becomes a secondary consideration namely, that of evaluating and establishing permissible. stack emis-sion limits.
Furthermore, routine radioactive emissions are expected to be only a small fraction of the permissible release rate and as a consequence the radio-logical effects of the maximum credible operating accident and the design basis refueling accident are the controlling factors. With the assumption that the stack discharge rates given in Fig. VII-5 are reasonable, we are in agreement with the computed maximum dose rates under lapse conditions. However, under inversion conditions there is a question in using a plume height above the ground of 200 f t.
at 3 miles inland from the site. Hills at these distances essentially form a barrier of about 600 ft. in height. The behavior of plumes in the vicinity of elevated ground is not well understood, especially under such conditions as the West Coast marine inversion. A recalculation of dose rates for the stable case l
using zero stack height instead of 200 ft. gives dose rates 20 times higher.
Admittedly, this is probably a pessimistic approach, but the problem needs further study.
It is hoped that the studies to be conducted at Humboldt Bay on plume behavior in the vicinity of elevated ground will include marine inversion conditions.
The on-sita meteorological measurement program which is to start in the fall will be particularly useful in deter.uining wind versus stability statistics.
It might prove useful to have an additional temperature measurement at sea level as well as the three planned levels in the tower, whose base appears to be about 60 ft.
above sea level.
In summary, as is the case in Humboldt Bay, the behavior of an elevated plume in the vicinity of higher terrain under marine inversion conditions needs study in order to determine permissible stack emission limits.
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