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Incorporating tritiated water into a 14C-sampling system for quantitative estimation of 14C activity in airborne effluent
Authors:J Koarashi  K Akiyama  T Asano  T Yokota
Institution:(1) Radiation Protection Division, Japan Nuclear Cycle Development Institute, 319-1194 Tokai-mura, Naka-gun, Ibaraki, Japan;(2) Inspection Development Company Ltd., 319-1112 Tokai-mura, Naka-gun, Ibaraki, Japan
Abstract:The effects of incorporating tritiated water into a 14C-sampling system in sample preparation and 14C activity measurement by liquid scintillation counting were investigated. Experiments derived the limit of water content in the prepared sample, and also demonstrated that 14C activity can be determined without any interference from 3H contamination for a clear-sample solution. The results enabled us to estimate the permissible relative humidity of air required for accomplishing sample preparation and 14C activity measurement. These showed that for sampling of air with less than the permissible relative humidity, total 14C activity in airborne effluent can be evaluated accurately without dehumidification of air.The authors would like to thank T. Kozawa, K. Isaka and Y. Adachi of Inspection Development Company Ltd., Y. Hiyama of Zuihou Sangyou Company Ltd., and T. Mizutani, H. Watanabe, M. Takeishi and K. Shinohara of Japan Nuclear Cycle Development Institute for their valuable assistance.
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