Estimation of 137Cs Body Burden in Japanese I. The Ratio of 137Cs Excreted in the Urine to that in the Total Excreta Following the Continuous Intake of 137Cs In Fall-Out

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The ratio of ^<137>Cs excreted in the urine to that in the total excreta, narnely, fu Value, was determined for a group of 10 Japanese male adults in continuous intake of fall-out ^<137>Cs. The ratio averaged 0.88, ranging from 0.83 to 0.92 and was very close to those reported previously. Additionally, the ratios for Ca and stable Sr were also determined and found as 0.36 and 0.15 respectively for the same subjects. The present fall-out from nuclear tests still gives rise to an appreciable internal dose due to ^<137>Cs to Japanese. The waste from the atomic power establishment may also bring a chance to expose the public to ^<137>Cs. In order to estimate the potential hazard of the low but continuous exposure to ^<137>Cs from these sources, ^<137>Cs body burden of the public must be determined precisely. The whole-body counting technique is the most reliable method for this purpose. However, in Japan. it is necessary to develop a dependable method in place of the whole-body counting because of a limited number of whole-body counter available for the measurement of the ublic.
日本放射線影響学会の論文