tne iikini Tsiana options.
Living pattern.
cheretore,
.e ineu
.as more
Lana@iaticn rate
Loaaging cf
in cci.éa.
. Tass
190 ~z/m° is at the aign
flemabilicy for totentiali exposure “12
end cor the cpserved range icr normal
otner pathways without exceeding
cpen air zerosol measurements.
fFed-
era. tuideiines.
ever,
since local resuspension creara2d
in tne immediare vicinity of an indi-~
TNEALATION FATHWAY
“idual during nis normai acrivities
ae
“ao air sampling data were taken
during the 1975 Bikini survev.
Jpen
is Drobabiyv greater “nan open air
measurements,
it appears reasonable,
fieid aerosols were measured to some
for lack of specific <ata,
extent previously ac 3ikini aroil. 2???
higher number.
3ecause orf the sparsitv of data. -ow-
concentrations in the surface soils
ever. and aiso the lack of data cn
=o use the
2
3
The average 739,240,
9 to = em) of Bikini and fneu Islands
resuspension processes in the aroil
are 2.3 and 1.4 pCi/g, respectively.
envir-
The oCi/day intake resulting from the
tions
ant,
the average concentra-
Pu in the soil were used ina
mass loading model to predict the
doses via the inhalation pathway.
above model is,
therefore, 9.019 for
Bikini and 0.0028 for Eneu.
The doses resulting from inhalation
This is the same approacn used *9
of 7412405, are listed in Table 10
evaiuate the inhalation pathway at
the three critical organs:
Enewetak Atoi1. 72
and. liver.
The mass loading concept may be
‘cr
‘lung, bone,
The doses predicted on
Eneu are, of course, ‘ess than those
more relevant for estimating the
oredicted on Bikini Island.
cot-ntial cose via inhalation than
doses will be compared beiow with bone
ope
and whole body dose from other pathways.
«ir aerosol measurements because
the resuspended material created by a
These
Two other isotopes must be consid=
person in his own immediate environ-
ered in the inhalation pathway — 2415,
ment may be significantly greater than
and 241sn,
is reflected in open air measurements.
in the soil on Bikini and Eneu is
Therefore,
approximately 10 times that of
it is assumed that the con-
The concentration of 2414
centration of Pu observed in the sur-
239,240, 3
However, because of low
face soil at Bikini and Eneu Islands
energy beta radiation (0.021 MeV maxi-
will remain the same in the respir-
mum) and a much shorter half life
able, resuspended surface material.
(14 vr) the integrated 30-, 50-, and
In addition, a mass loading of
70-vr doses from 2415, are more than
190 g/m and a breathing rate of
one~tenth less than those listed in
29 -/da were used to develop the Pu
Table 10 for 73942505,
5
ag