The bone-marrow dose-rates t o children are calculated by combining
-;+
h the approach develored by Srier
1)
Bennett's model for children
and used in the UNSCEAR report
the mineral or matrix pone dose
for estinating bone-marrow dcse from
The values used for converting Le
doses, to bone-marrow and endost eal cell d
respectively.
are 0.314 and 0.434
Eennett's model a lso extrarolates to the adult case and
is combined with the Sriers aprr cach for predicting the pone-narrow
doses to adults.
The bone mass is- assumed to correlate directly vith
these data as a function of age are taken from Sriers.
masses are based upon averace data fron the U.S.
271
These tcdy
rorulavion and a factor
of 0.85 was incorporated to account for the smaller sire of the
Enewetakese.
The calcium concentraticn
in tone
(eCe,g cone) as a
1S
:
function oF age is taken freom Hennett.7~
In calculating the mineral tone cose (D, dose) in IVd-1-S, the
x
approach of
tanol&
ICRP”
>
was Tollowed,
.
using a ef = 1 and n=5.
The doses
calculated from this model are compared to the 3-rem'yr guide (ICKP
for bone for general public.
both children
.
a2
$)°”
However, in assessing the annual dose to
and adults, the bone marrow is taken as the critical organ,
“oe
.
meas
aaett
and the recommendaticns in ICHP il
.
are usec.
In this rodel the quality factor is still one (GF = 1), and the *n"
factor is no longer arplicable.
The bone marrow is considered in the
category of sensitive plood-farming organs, and the ccerresponding dsse
guide for such organs is 0.5 rem/yr rather than the 3 rem/yr for
mineral bone.
te be wo