33
These
Indoors
the
by about
gravel
al,
estimated
external
rate
is
50% in
the
that
is
gamma-ray
reduced
by about
50%.
vicinity
of
immediate
spread
around
dose
them
rates
are
Likewise,
houses
maximal
the
owing
(Shingleton
et
al,
external
dosage
ones.
rate
to
is
the
1987
reduced
coral
and Robison
et
1982b).
Other
come
from
In
annual
cosmic
contributions
radiation
summary,
the
to
(.028
rem)
contribution
which
and medical
of
fallout
in
1978
to
are
p@
included
exposure.
the
total
external
.
radiation
year
would
.590
dose
uncorrected
Rongelap
for
decrease
it
rem allowing
Environmental
reduce
at
this
decay
estimate
the
Island
shielding
by 25% or
for
within
more.
The
spontaneous
such
still
as
decay,
leaching
●ore,
but
of
was
or
30-year
but
approximately
around
rem per
which
dose
would
be
shielding.
radionuclides
was not
buildings,
whole-body
not
.028
allowed
from
for.
the
soil
would