portation, Since a survey of all individuals’ showed (hat there was SaRncant contiimimation of
skin and clothes, prompt decontamination was instituted.
Clothes were removed and Laundered,
There skin and hace wece washed repeatedly with fresh water and soap. In ony adtividuals,
partieufirfy in the Maurshatlese, owas difficult to wash Che radtatetive maternal trdme fhe hair
because of the heavy coconut of hur dresstig used by these people.
Table it
Group
Designation
EXPOSED AND CONTROL UNEXPOSED GROUPS
Total
Number
inGroup
Distance
fram Biking
(Nault. Miles
Approximate
Effective
Thne of
Fallout
28
1ad
H+ 6.8 he
Aiericans,
Exposed
Rongerth
3
Instrument
Readings
Used tn Dose
Calculations
est Estimate
oof Total Gamma
280 nr chr
Hot o dave
7H
Hee 50 hr
$75 mrehe
175
(16 people)
He Slr
Ht 7 days
Time of
Evacuation
H + 28.5 hr
(8 men)
Dose ta Airc)
H+ 34 hr
(20 men)
Aine rienns,
105
Controt
Kway American
Marshallese,
64
105
Hoe ahr
hx posed
Maaipee lang
Attingetinae
Utirik
.
iB
197
Marshallese,
Control
Majure Group
a3
H+ 4hr
270
H+ 22hr
117
(48 people)
H+ Sehr
.
100 mrvhr
H + Y days
Started at
40 mr/br
Hi SS hr
Completed at
H+ 78 hr
H + 8 days
69
14
Total Exposed — 267
Total Controls ~ 222
*See Section 1.4.3,
1.4
ESTIMATION OF WHOLE BODY EXTERNAL DOSE
The estimated values of external dose given in Table 1.1 were based on readings of
AN POUR-39 tield instruments. Averages of a sumber of dose rate measurements on each
island ata piven time were used. The readings were taken in air, approximately 3 feet above
ground, severa) days after the inhabitants were evacuated. Before this time, adequate surveys
with well calibrated instruments had not been possible.
Several variables which influence the results are indicated below. These will be discussed
1a greater detail in an addendum report on external dose, which will contain the data, methods
and calculations by which the external dose analysis was made.
\.4.1
Energy Distributionof the FalloutGamma Radiation,ItsVariation WithTime, the
Response of the Meter in Each Energy Region andIts Correction Factor for the Total
DoseSpectrum
Fallout deposited as an effectively infinite plane source resulted in the dose-energy histogram shown In Fig. 1.2. Its energy distribution was the result of degradation of the original
.
aeoe
.
e
»
peseee
.
16