A Survey of ~90Sr and ~137Cs Activity Levels of retail Foods in Japan

摘要

A comprehensive survey was conducted on ~90Sr and ~137cs activity levels in retail foods purchased from retail markets all over Japan during the period 1`989-1994, and the annual effective dose equivalent due to dietary ingestion was estimated. The concentrations of `90 Sr and ~137Cs in the food samples were determined using γ-ray spectrometry and the radiochemical method. The following were clarified by this study: (1) the ~90Sr and ~137Cs activity concentration levels were below 1 Bq kg~-1 for almost all food samples except for the dried foods.