i1
.
Weight (kg)
on
o
>
o
Weight (kg)
a
°o
~l
o
80
20 7
10
3
1
Figure 1.
1 to 18 y.
$3
5
7
9
#11
13°
615
‘
3
0
#17
4
6
Po
9
12
Age (months)
Age (y)
Body weight as a function of age,
Figure 2. Body weight as a function of age,
0 to 12 mo.
development and Ca/Sr metabolism as a
function of age, the reader is directed to papers
by the authors of the various age-dependent
90Sr dose models and their associated references
(ICRP, 1972; Cristy et al., 1984; Leggett etal.,
1982, 1984; Papworth and Vennart, 1973, 1984;
Spiers, 1968; Bennett, 1973, 1977, 1978).
Dosimetry
Cesium-137
and that no energy is transferred to any other
organ,i.e., target (T) organ. In other words, for
The conversion from the intake of 137Cs to
charged particles, the source organ is also the
the dose-equivalent rate and integral dose
equivalent is based upon the ICRP methods
described in ICRP Publication 30 (ICRP, 1979).
For charged-particle emission, the basic ICRP
target organ. As result, the specific effective
energy, SEE, (Te 5S), in meV/g per
transformation, changes proportionally with
mass for the standard adult; the relationship as
a function of age is
methodology is adjusted for age dependence by
using body weights (and organ weights) for
various ages determined by methods described in
the "Retention" section of this paper.
(SEE), = 20 (SEE).aur,
M
It is
assumed for charged-particle emissions that all
where (SEE),4.,is the ICRP value for standard
man, 70 kg is the mass of standard man, and Mtis
the body or organ massat age t. This is the basis
of the energy is deposited in the organ that
contains the activity, i.e., the source (S) organ,
5008253
15