24
TABLE 4.2 #1A
INGESTION
FACTORS TO CONVERT “INITIAL DAILY INTAKE (pCi/d)" TO
"WHOLE BODY" OR “TISSUE” DOSE (rem) FOR DIFFERENT PERIODS OF DAILY INTAEE °/
|
Radionuclide
& period
CESTUM-137
initial year
0-30 year
30-70 year
|
ES’
(3.7 BA
Lungs
{1.8
Bone
Liver
surfaces
ES
Like C.E.D.E
[3.8 BS
EA
2.4
E5
initial year
4.7
E5
2.4
E-4
1.8
E46
5.3
E-4
1
E-6
0-30 year
9.2
E-4d
5.0
E-3
3.6
E-5
1.1
E-2
3
E5
30-70 year
5.6
8-4
3.0
E3
2.2
ES
6.6. E-3
22.
«(CESS
initial year
1.3
E-3
1.9
E3
1.0
£E-8
2.4
E-2
4i2
E-3
0-30 year
3.9
E2
5.7
E-2
3.1
87
7.3
E-l
1j3.
El
30-70 year
5.1
E-2
71.4
E-2
4.1
§E-7
9.6
El
u7
El
£E-6
7.3.
El
U3
OE~l
PLIPTONIUM-239.-240
'
1.7
Red
marrow
2.2
STRONTIUN-90
|
C.E.D.E.>/
AMERICTOM-241
initial year
|
0-30 year
|
30-70 year
13 #3
13.9
E-2
Like plutoniua
5.7
E-2
1.6
Like plutonium
L
®/ It is assumed that the daily diet remains constant, but that the
L
ines
in it
decay spontaneously. The table provides dose factors in rem/picocuries/day.
[t is based
on NRPB (1987) which provides factors in Sv/Bq (= 3.7 x rem/picocurie), and is{ consistent
with ICRP recommendations (ICRP 1986, 1987). These factors allow for the
of
radionuclide absorbed from the gut, its distribution and residence time in
body, the
absorption and effectiveness of its radiation in the body, and its rate of
ical decay.
b/ Committed effective dose equivalent (whole-body dose). Other doses are
equivalents (tissue dose). The C.E.D.E. is the sum of the dose equivalents to/ll
the body of a standard man, each weighted by the risk resulting from a unit
tissue as compared to the risk from a unit dose to the whole body.
c/ E-5 signifies:
x 10-5.
itted dose
tissues of
to that