Thyroidal Burdens of 129 from Various Dietary Sources

Publisher Website
Google Scholar
Abstract
129I is considered to represent a potential environmental and health hazard because of its production during nuclear fission and the likelihood of subsequent environmental release during processing of spent nuclear fuel elements. Thyroidal burdens of 129I were calculated for 1, 4 and 14 yr olds, and adults, using available dietary data. Milk and milk products contributed 63, 57, 54 and 33% of the total thyroidal 129I burden of the 4 respective age groups. As the contribution from dairy products decreased, that from meat increased from about 12% for 1 yr olds to 35% for adults, while that from leafy vegetables remained relatively stable, from 17 to 21%. From ingested foods produced in air assumed to contain 1 pCi 129I/m3, daily dietary 129I intakes of 1.3, 1.2, 1.7 and 1.5 nCi were computed for the 1, 4, and 14 yr old child and adult, respectively. For each nCi ingested daily, thyroidal dose rates for the respective age groups were calculated to be 4.9, 2.1, 1.7 and 2.6 rem/yr, with the altered dose rates reflecting age-related differences in thyroid gland size and iodine kinetics.

This publication has 4 references indexed in Scilit: