255Ppy and “S1am in Surface Soil Samples Collected at Bikini Atoll in 1972,
Location
239,240,|
Isi-29, Ourukaen
Is1-30,' Bokoatokutoku
Is1=-30, Bokoaetokutoku
16.3 +0.5
15.1 +0.7
22.2 +0,5
Boro Bokeroryruru, Isl-31
36.4 +2.8
Pisonia Grove
down center of island
Namu, west end + 150 yds
Namu, 200 yds SW of bunker
300 yds E of west tip
activities in pCi/z + le.
.
24,0 +0.1
20.1 +0,3
2385,
241,
5.7 +0.2
3.9 10.3
6.7 +0,2
3.6 +0.3
4.3 40.42
7,0 +0.30
2,86
3.87
3.31
4.53
3,51
3.17
3.05
2.75
13.0 +1.1
00.2840.02
0.2440.02
14,0 10.4
11,0 +0.7
.
85.7
83.8
1,68
1.76
15.0 +0.05
73.9
1.57
30.5
1.68
22.9 +0.7
0.3140.04
Namu, 200 yds E of bunker,
center of island
Bikini, Row 24 center BL to
17.4 +0.6
0.5740,11
10,0 0.5
3.3 0.1
0.45+0.04
2.2 +0.3
Ist BLN
239,240,241,.,
f
7,2 +0.8
Namu, top of bunker center
of island
239,240, 2385,
--
4.01
3.41+40.36
Bikini, Row 34 center BL to
3.0 +0.2
0,06+0,04
2,1 40.2
50.0
1.42
Bikini, Row 38 2nd BLN ta
2.5 W.2
0.0740,04
1.2 +0.2
35.7
2,08
Bikini, Row 25 or 26 sande
0.50H0,05
--
--
--
lst BL
Lagoon Beach Rd.
pile sample, 100 yds $
~
N.S.
8740.12
1.50
Bikini, N corner of ctr. BL
and Lagoon Beach Rd.
N.R.t
7.33
of 2nd BLN
Bikini, Row 34 ctr BL to
10.8 +004
NLR.
3.3 +0.3
--
3.27
Bikini, Row 24 ctr BL: to
13.2 +0.3
N.R,
8.4 +0.55
--
1.58
Bikini, Row 24, lst BLN to
9.3 40.4
0.39+0.07
4,1 +0.2
23.8
2.27
Bikini, Row 34, Ist BLS to
11.6 +0.4
0,094+0,02
5.3 +0.4
128.6
2.18
Bikini, Row 24, lst BLN to
7.8 +0.2
0.20+0.03
3.5 +0.3
39,0°
2.23
97.6 +4,3
24,0 +1.5
2.14
8.57
174.3 +2.8
45.0 +1.0
2.07
8.05
lst BLS
Ist BLS
Lagoon Beach Rd.
2nd BLS
2nd BLN
Eneman, NW end of island
209.2 +9.0
500-700 mR/hr area
Eneman, 500+700 mR/hr area 360.9 +5,9
*
single sample error values are one-sigma, propagated, counting errors,
gN.R. Not resolved by alpha spectroscopy.
N.S. Noe significant.
See ref, 29,
AS a result, some of the dietary items likely to have the higher radionuclides content, e.g. pandanus
and breadfruit, are not actual problems to date, They may or may not be of concern in the future as the
plantings mature and the fruit becomes available in quantity, Thus, the diets of people living in these
two atolls are expected to change over the coming years reflecting the relative influences of imported
and locally grown food items. Allowance has. been made for this in development of radiation dose
estimates,
Experimental studies at Enewetak may yield techniques to interrupt or break the recyciing
of radionuclides through the vegetation, soil, and ground water systems, and thereby
activity content of some important dietary items. All of the aforementioned factors
continuing monitoring of the diet for many years,
Periodic sampling and analysis of
water will be necessary in order to establish trends in the changes of radioactivity
media.
reduce the radiowill necessitate
soil and ground
content of these
In the northern Marshalls, drinking water is obtained primarily from rain water catchments,
While the
radionuclide content of collected rain water will not be zero, chis source is not expected to contribute
significantly to the radiation exposure picture for future Bikini, Enewetak, and Rongelap Atoll residents.
However, rain water which drains from the windward side of building rooftops may provide useful data on
resuspension of radioactivity in the soil.
The collection of rain water by future Bikini and Enewetak
residents is being facilitated by including guccers and water storage tanks in plans for houses and
community structures.
Some of the larger islands have fresh ground water located only a few feet below
the surface. Analysis of this water for its radionuclide content has been limited to date and the
capacity of this resource to serve the needs of island residents is not well defined. More study of
this water is being supported by ERDA.
Personnel Monitoring
Dose predictions for Bikini and Enewetak Atoll residents derived from environmental data have been
deliberately conservative, and establish probable upper limits on doses to be expected for individuals.
9002333