BRAVO test.
These data, cogerner with. appropriate ‘conversion:factors:and. Living UES
x
ate
pattern models, provided an eotinate of external dose equivalent.
METHODS
mee
VR fpeterenteen nen) we ae or
Ae lhe rat einen Se
Exponentially declining activity concentrations have been observed in eure
.
137
129
90
face soil for
Cs,
I, and
Sr from 1954 to the present on Ronge lap
and Utirik Atolls.
Declining: activity concentrations heave also been observe
in vegetation at a rate greater than that predicted by radioactive: decay.
‘
POT
Epp ep
Thus exponential decline in dietary activity was assumed and| the following
general equations were derived.
>
TEM
i
i
1g T(Atk, De
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¢
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ve
boo
2
Af
i
2)
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a
nN]
: aR
KiKi er
a
é
or
a
ek
|
s
Ape = te
Te a it a Ge ape aera
‘hg
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:
1
7
“409
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nN
io
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de
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ist SKV
i tg)
soa L“r
,,
Eo
Oy gig (RE RS
(2)
i Kirk
“K,
E
and
Xi
D= £,\P°9 arake S
tAE
+ (pane)
IE D
E/ en Ki
OMKEK
e~ad
Kirke-OrK;) (e
+ q? t;
De.
a {l-e -(y+Ky i js
7
:
5
(3)
where
ait: