Radioactivity Survey of Total Diet for Saitama Residents(Apr. 2011 - Mar. 2013)

Abstract

In order to estimate the human intake and the committed effective dose of several radioactive materials, the duplicate diet samples sampled from Saitama residents were analyzed. The average daily intakes of ¹³⁴Cs and ¹³⁷Cs in 2011 were 0.43 and 0.48 Bq/person･day, and those in 2012 were 0.065 and 0.15 Bq/person･day. The committed effective doses in 2011 and 2012 are estimated to be 5.5 and 1.1μSv, respectively. The estimated dose in 2011 is almost 80 times higher than that before the occurrence of Fukushima Daiichi Nuclear Power Plant accident. However, it is found that this dose is less than 1% of the annual effective dose limit for members of the public (1mSv/year).