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). | 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