TABLE ITI
Factors for Converting Air Concentrations of Radioiodine
to Thyroid Dose via Consumption of Green Leafy Vegetables*
(mrem/yr per pCi/m3)
Age
1-129
[-130
I-13)
1-132
1-133
1-134
J-135
1 yr
0
0
0
0
0
0
0
4 yr
502
2.09
183
0.0443
7.43
0.00440
0.580
14 yr
720
1.33
129
0.0272
4.40
0.00267
0.351
Adult
1360**
1.40
143
0.0283
4.57
0.00280
0.366
*
Assuming:
1) All 12 months of vegetable consumption is from local gardens.
2) One-year old eats no fresh vegetables; 4-year old eats
32 kg/yr (max); 14-year old eats 54 kg/yr (max); and adult
eats 73 kg/yr (max).
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3) Crops are exposed 3 months, above ground, to air deposition.
4) 25% of all fallout sticks to vegetables with an ecological
"half-life of 14 days.
5) No decay from garden to table.
6) All radioiodine is inorganic.
multiply DF's by (Z/100).
If only Z% is inorganic, then
7) Ignoring long-term accumulation in soil, which for I-129
would add 1.3% in one year or 50% in 40 years.
kk
Dose in first year. Maximum dose rate after equilibrium is
reached between thyroid burden and intake rate would be 1.09
times this value.
Revised May 1976
J. K. Soldat