ma
fin
a 7 regression coeriictienct equal co 19 for males and 14 for females,
b = regression coefficienc equal to -3.9 for males and ~2.65 for females,
m = mass of Sodv, xz.
In this report, x4 was computed using 2quation 4 and the mean dod mass for the
infant's first year of life, leading to a mean Ddiological half time of 22 davs
for male infants and 28 days for female infanes at age 5 months.
These half
time compare well to the value reported in NCRP77 of 19 davs = 8 days for infants ages 17-143 davs.
.
.
137
.
+:
Cs body burdens and the total number of
Using equations 3 and 4, the
disintegrations occurring in the body of the infane during the 365 day uptake interval concluding on 31 August 1978 were calculated.
The oarameters in Table 3
and the values of x5 obtained from equation 4 were also used.
The total body
In the
dose equivalent was then determined, using the results from equation 1.
adult, red marrow absorbed dose exceeds the total dodv absorbed dose from 137.
by a factor of 1.5.
This is due to the scattered photon contribution along the
midline of the body and due to irradiation of red marrow from all sides.
In the
infant, the red marrow distribution is significantly difterent relative to the
.
Ls
.
adult and therefore this factor cannot be applied.
burdens are reported in Table 5.
.
1 37
.
.
Projected
Cs infant body
This cable also summarizes the dose equivalent
commited during the residence year on Bikini to an infant from the ingestion or
1376,
in human ailk.
Discussion of Results
a
The mean values presented in Table 5 were computed using equations ¢ and
3 and the mean values of the quantities listed in Table 3.
The ranges were
computed by sudstituting the upper and lower limits of adult female
burden on l September 1977.
137
.
Cs body
In the estimate of a range of dose it may seem rea-