CONTROLLED ENVIRONMENTAL RADIOIODINE TESTS
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level indicated average speeds of 7.1 and 9.3 m/sec during tests 1 and
2, respectively. The values of turbulence parameters measured during
both tests in terms of horizontal and vertical wind fluctuations were
almost identical.
Deposition Velocities
Figures 7 and 8 show the initial distributions of radioiodine deposited on the pastures. The deposition velocities, V,, on various mediums for both tests are summarized in Table 1.
Vor
CM/ SEC
g°
1
ge
ails
0.72
°o
G/i,?
e
e
g
S
7
fe
s-s
*
°
&
e/fe
2— 8
0.55
$
oe
Oo
&
Q
VU
°
a.
o
e
.ou.°
0.37
,
Qo
~~.
e
=
©
-_
soso”
0.70
0
25
50
100
Fig. 7—Diagram of initial deposition of 4!I on grass and deposition
velocities in first test.
The deposition velocities are generally higher for test 2 except on
soil. It is interesting to note that if the grass deposition velocities are
divided by their particular average grass densities, 153 and 246 g/m’
in tests 1 and 2, respectively, the deposition is practically the same