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Determination of the Atmospheric HTO Concentration Around the Nuclear Fuel Reprocessing Plant in Rokkasho by Using a Passive Type Sampler

Naofumi Akata, Hideki Kakiuchi, Kuniaki Kanno, Nagayoshi Shima, Shun'ichi Hisamatsu

Fusion Science and Technology / Volume 60 / Number 4 / November 2011 / Pages 1292-1295

Environmental and Organically Bound Tritium / Proceedings of the Ninth International Conference on Tritium Science and Technology (Part 2) /

In order to study the areal distribution of 3H in the atmosphere around the spent nuclear fuel reprocessing plant in Rokkasho,Japan, we developed a passive type sampler of atmospheric water vapor and tested its usability in the field. A polyethylene bottle with a porous polyethylene membrane at the opening was used as the sampler. The bottle contained 300 g of molecular sieve 3A (MS-3A) for adsorbing water vapor passing through the membrane. The concentration of 3H in water recovered from the MS-3A in the bottle was compared with that obtained by an active type sampler. Both 3H concentrations agreed well with each other, which showed that the method developed was practical and effective. Using the passive type samplers at nine sampling points around the nuclear fuel reprocessing plant in November and December 2007, we successfully obtained the monthly areal distributions of 3H concentrations in the atmospheric water vapor.

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