Considerable data has been compiled to show that the global fallout ratio
of
137g
of
data
to
906,
shows
averages
the
1.45.
A
lesser,
239+ 2405,
fallout
to
but
90g,
ratio
ratios were confirmed
in open-ocean air samples
collected
1977;
in
0.01340.003
late
was
0.015,
which
13706
to
measured
can
be
90.5,
predicted
of
on
13765
Estimated
concentrations
and
of
the
to
905,
in
concentrations
This
in
13765
with
rain
5
compared
the
6
of
average
fallout
from
respective
Table
of
ratio
computed
the
in
the
Expected
are
and
These
ratio
relating
fallout.
in
Table
are
ratios
0.022.
Equatorial Pacific
to
agrees
reported
23942405,
906,
from the
amount
the
fallout
to
measured
cistern water.
Except for Rongelap and Bikini, the
137
concentration of
Cs measured in cistern water is found to be in
average
from
agreement with the average,
239+ 2405,
measured
Rongelap,
is
A
and
than
by
assuming
interior
walls
particulates.
of
that
the
Thus,
Northern
the
Bikini
concentration
explained
the
predicted concentration from wet deposition.
less
Ailinginae,
agreement.
from
from
significant,
averages
239+240),,
filters.
239+ 2405,
concentrations
ratios.
fallout
the
computed
and
concentrations
a
still
less
a
where
than
of
or
concentrations
Islands
the
the
90.
can
be
values
fallout
Pu
settles
of
concentration
two
expected
fraction
cisterns
Marshall
predicted
is
to
and
except
are
levels
in
bottom
in
13765
reasonably
well
at
general
can
precipitated
the
The
only
onto
with
cistern
be
the
the
water
predicted
from
rainfall and fallout measurements at other Pacific Islands.
The National Interim Primary Drinking Water Regulations, published by the
Environmental
Protection
concentration
of
Agency
beta
(EPA),
particle
and
states
photon
"that
the
average
radioactivity
from
annual
man-made
radionuclides in drinking water shall not produce an annual dose equivalent to
the total body or any internal organ greater than 4 millirem/year" based on a
2 1/d
the
intake of drinking water. 14
sum of
their
exceed 4 mrem/y.
or
organ
13705,14
1376.
than
of
5
104
0.01%,
and
6.
and
2%,
The
to
mrem/y
the
at
of
are
the
measured
total
body
present
of
Bikini
limits
the
or
6.3
of
to
water
500 X 103 fCi/l in drinking water.-?
10
0.001%
shall
and
by
samples
and
The
of
not
200 pCi/l
for
the
906,
and
are
shown
1376, are everywhere
guidelines.}°
is
organ
to produce a total-body
905,
EPA guidelines
fCi/l
any
represented
of 90, and
the
FRC
for
cistern
levels
the
of
8 pCi/l_
EPA
in
respectively,
respectively,
concentration
4
percent
concentrations
Tables
dose
two or more radionuclides are present,
The average concentrations computed
dose
The
annual
If
the
less
than 0.2%
average
FRC
in
less
and
239+ 240,
guideline
of