:
x
a ees
‘act cat
Seana
a ah Raed artis, anlca
shesia Bh ik
al KS
Ot
.
ae
fOTAL DOSE ESTIMATES
8.1
CAILULATAD VALE nS
the total foses calculated for eech cf the Lstends for hypethet1 in Table 3.1,
ical fallout tines of 3, 12, aad 16 hours are civca
We
together with the doses calculated an beferruse 14, in crder to illuge
.
trata the difference in the estimates due to the Lalater infomation on
Hamma spectra, celer response, and cecay rarates,
n sidered
Ye most probable, tetug
sf
Z
ae
most
Pa
dye data (sce See been 0.2), Lones
consistent wiih
eS ts
oes fe aide,
based on this value are aultip]
:
eboney factor
discussed tn
Chapter 7, in ovder
to express
f the air-ee se from a
sovree of siniler ecnervy under bila teral exposure Lavora tery eonditiouas
which would hava precuced the sane nicline dose, A plot of dose rate
versus tine based on Fhyure 3,3 was used and the total dose was praphfeally determined by normalizing ordinates and dose rates for a given
time and measuring the areca under curves sinilar to Tijzrre 6,1. ‘This
was done assuming all three fallout tines for cach island,
The air-dose rates seasured at later times (Table 2.4) were milti-
plied by the total correction factor for pwometry and cneryy dependence
of the survey meter (see Section 6.2). Falleat recinning tines and
evacuation times used were those of Tatle 6.1, It was found that doses
calculated using the decay cxponents of Section 3,2 sere in good ayree-
ment with these determmincd praphically.
8.2
DISCUSSION
ae
Fisure
0,4 illustiates the cumulative air-ccse as a Ninction of
Tt
time on honyelap atoll, tascd on the 12 hour fa lout acnusp tion, It
can te seen that the rate of delivery of the dose varied continuously,
the major portion being received at the hipher duce rate prevailing
in the mideportion of the exposure period, Py the time that 90 percent
of the dese had been miceived at H+ 43 hours, for evajple, thr dos
rate had fallen to 2.7 r/hr, less than ho percent of its naxisum value
of 7.4 r/fhr at H+ 1G hours,
had teen received,
At H+ 16 hours, 25 percent of the duce
Thus the dose rate durtar exposure diftered inarked-
ly feor that usually enccuntered usin. Reruy units,
The dose values fer hon,erik gives
1 Tatle 5.1 are 7 5 iwroont of
the computed values, averayea for the 23,S*and-3hehour ery osires, This