Alimentary tract absorption @ S. A. IBRAHIM ET AL.
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APPENDIX
Table Al. Summaryof literature values for alimentary tract absorption fraction (f,) of key fallout radionuclides in
various ingested forms and experimental conditions.
Ingested form
A
Comments
References
Literature information, based on
1.0
Adopted value for workers
ICRP 1979, 1989,
0.90
Hardy et al. 1965
0.82 (0.73—0.84)*
Only one human subject
investigated, chronic intakes
5 human subjects investigated
0.31 (0.29-0.36)"
3 human subjects investigated
0.89 (0.87-0.90)*
0.99
0.78 (0.1-0.4)"
4 human subjects investigated
2 human subjects investigated
10 human subjects
investigated, chronic intakes
6 humansubjects investigated,
chronic intakes
3 human subjects investigated
Iodine (D
ingestion from aqueous solution,
milk and incorporated in
foodstuffs
Cesium (Cs)
Contaminated food items from
Rongelap, Marshall Islands
Cg + carrier in silicate form,
simulated distant fallout
particles (see Table 3)
'“Cs carrier free in microspheres,
simulated local fallout particles
(see Table 3)
'Cs in chloride solution
87Cs and '°Cs, carrier free
'S7Cs incorporated in venison meat
'87Cs incorporated in shellfish from
the Irish Sea
'87Cs incorporated in food and
Cs in chloride form
Typical literature information for
various animal species
Literature information on various
physico-chemical forms
Strontium (Sr)
Sr in bicarbonate form
Sr in silicate form
Sr in diet and milk
Contaminated food items from the
Marshall Islands (Rongelap)
0.23 (0.1-0.4)"
0.98
0.57
0.78
0.27
1.0
0.10
0.15
0.26 (0.09-0.48)"
0.30
(acute intakes) and the
general public (chronic
intakes)
1996; U.S. EPA
1988; Kendall et
al. 1988 (NEA)
LeRoyet al. 1966
Tinumaet al. 1971
Henrichset al. 1989
Huntet al. 1998
Raaf et al. 2004
Reindeer
Mule deer
Lab mouse
Adopted value by various
organizations for workers
and members of the public
NCRP 2006
Animal studies
Hamilton 1944
4 human subjects investigated,
chronic intakes
1 U.S. subject investigated, f;
was calculated from intake
Fujita 1965
ICRP 1979, 1989,
1996; U.S. EPA
1988; Kendall et
al. 1988 (NEA)
Hardy et al. 1965
and excretion, chronic
Sr + carrier in oxide form
incorporated in particles to
simulate distant locations (see
Table 3)
Sr carrier free in oxide form
incorporated in glass
micro-spheres to simulate local
fallout (see Table 3)
Sr in chloride solution
Contaminated food
0.23 (0.07-0.47)*
intakes
9 human volunteers in two
groups fed different levels
of activity
0.16 (0.06—0.25)"
5 human subjects investigated
0.17 (0.08—0.34)*
11 human subjects
investigated
10 adult humans on high Ca
0.17
diet, chronic intakes
Literature information on various
0.3
0.01
Literature information on various
0.30
ingested forms
ingested forms
Barium (Ba)
3Ba in local fallout simulated
particles
'3Ba in distant locations simulated
particles
Literature information on diet
Literature data on Ra
For all compounds
For SrTiO, acute intakes
(workers)
Based on upper limit of
soluble forms of Sr, chronic
intakes (general public)
0.01
LeRoyet al. 1966
Spenceret al. 1963
ICRP 1979; U.S.
EPA 1988
ICRP 1989, 1993,
1996; Kendall et
al. 1988 (NEA)
Ingested by 4 humans subjects
LeRoyet al. 1966
Adopted for workers (acute
intakes)
Based on Ra absorption,
adopted for the public
(chronic intakes)
ICRP 1980
0.06
0.10
0.20
ICRP 1993, 1996
(Continued)