case where residence would be on Einjebi Island but most of the food
"HEN
[Ph GEND
LIN
'°Cs residence time (d)
yaa
NES
ale
ANTS
a
‘ent
products would come from the southern islands. The 30- and 50-y
integral dose equivalents for the Enjebi Island living pattern are listed
in Table 10. The 30-y integral, whole-body dose equivalent is 5.7 rem
when imported foods are available and 10 rem when unavailable. The
corresponding 50-y integral doses are 8.4 and 15 rem, respectively.
Evaluation of other living patterns is given in Ref. 42.
The maximum, annual dose-equivalent rates for the two major
residence islands at Bikini Atoll are listed in Table 11. The doses,
,
|
Fad
:
:an
Sy
yeu)
:
:
sal
ght
font
4
‘
.
based on the MLSC diet when imports are available and unavailable,
t
range from 1 to about 2 rem/y for Bikini Island and from 130 to 260
mrem/y for Eneu Island. The 30-y integral dose equivalents given in
Table 12 range from 22 to 45 rem for Bikini Island and from 2.9 to
+
in
2410!
oY
POTT tO
”
m
2A
8O00410'
HW,
RO:
n
:
bons
1h
”
62
.
TE
,
he
.
16
'
:
150)
r
669
'
:
5.5 rem for Eneu Island; the integral doses are listed to show the
1 R7 10"
contribution of each radionuclide. The ''’Cs through ingestion of local
{oI
'
OBA FF
‘
ODE
:
1
999
$c0
Cumulative probability (%)
Fig. 11. Log probability plot of the residence time of '"Cs in the body of 152 adult
Marshallese males.
1
food and external gamma exposure accounts for over 90%of the total
dose, The "Sr is the next most significant contributor to the bonemarrow dose. If the BNL diet was used, the doses would be about 2.7
times those listed in the tables.
The 30-y integral dose equivalents for Bikini and Eneuarelisted by
exposure pathway in Table 13 to show the relative contribution of
Results
Here we present the predicted, maximum annual dose-equivalent
rates and the 30- and 50-y integral dose equivalents for the different
living patterns and resettlement options. The doses are calculated
using the average dietary intake, radionuclide concentration, radionuclide fraction absorbed into the body from that ingested, biological
residence time, and external dose rate. The maximum annual dose
rate for the whole body is defined as the dose rate in that year after
the Marshallese return when the sum of the whole-body ingestion dose
from '’Cs and the external gamma dose is a maximum. For bone
marrow, the maximum occurs when the bone-marrow ingestion dose
each pathway. The terrestrial food chain is the most significant
potential exposure pathway; the external gamma exposure pathway is
next in significance. The other pathwaysare relatively minor contributors. More detail on the Bikini Atoll dose assessment can be found
in Ref. 15.
TABLE 9.— Maximum, annual dose-equivalent rates in mrem/vfor adult females for diet
_ conditionsuwshen imports«are|available and unavailable.”
bPathway
Location
‘Type of diet
woe
E njebi
Southern
77
Enjebi fsland
se equivalent rates
range from 235 to 500 mrem/y for Enjebi Island depending on whether
imported foods are available or unavailable and from 3.7 to 7.8
mrem/y for Enewetak and other southern islands, The third living
pattern, with doses intermediate to the other two living patterns,is a
64
Year ol
Ingestion External
Total
masimum
_
Se
Imports
Bone marrow
237
54
291
10
available
Whole body
222
55
277
9
Imports
Bone marrow
500
54
54
' 10
unavailable
Whole body
455
iA
509
10
from ‘Cs and ”’Sr and the external gamma dose is a maximum.
The estimated, maximum annual dose-equivalent rates for three
living patterns at Enewetak Atoll based on the Ujelang Dietare listed
Organ
Imports
islands
-
ern islands
available
Imports
unavailable
Imports
availa
Imports
unavailable
Bone marrow
Whole body
Bone marrow
Whole hody
Bone marrow
TOUY
Bone marrow
Wholebody |
3.9
1.2
3.3
9.8
7.4
39
1.2
1.1
1.2
47
aT
vor
63
47
107
43
Al
4.5
11
8.6
86
on
140
110
3
2
5
3
9
2
12
9
,my he listed doses can he converted to SI units
tsby the equation 100 mrem = 1 mSv.
65