Study on uncertainty of soil-to-plant transfer factor for the safety assessment (Contract research)

Saito, Hironori*; Takeda, Seiji ; Kimura, Hideo

The objective of this study is to estimate the parameter uncertainty of soil-to-plant transfer factor used in the safety assessment. The database on the soil-to-plant factors was improved to clarify the factors associated with the uncertainty of soil-to-plant transfer factor. The factors were specified based on investigating the relation between published data of soil-to-plant transfer factor and some kinds of experimental conditions. Under the assumption of stylization by both general habits of ingestion of farm products and soil conditions in Japan, we proposed the procedure to estimate the parameter uncertainty of soil-to-plant transfer factor according to the investigation results of the factors. Based on the procedure, the variation of soil-to-plant transfer factors for main radionuclides of high level radioactive waste and TRU waste were estimated in this report.