Behavior of iodine-131 in dissolution of irradiated uranium dioxide.
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概要
- 論文の詳細を見る
A hundred milligram of UO<SUB>2</SUB> was irradiated in JRR-4 (burn up 0.017%) and dissolved in boiling 3 M-HNO<SUB>3</SUB> (20 ml) to study the behavior of fission-product iodine (<SUP>131</SUP>I, 1 ng). During the dissolution, 8090% of the iodine volatilized together with <SUP>133</SUP> Xe. Zeolitel3X (4g) trapped completely the iodine in the dissolver off-gas. Blowing a NO<SUB>2</SUB> flow through the solution was effective for expulsion of the remaining iodine and finally 9095% of the initial iodine was removed from the solution with the aid of addition of KIO<SUB>3</SUB>. The iodine species in the solution includes I<SUB>2</SUB>, I<SUP>-</SUP>, IO<SUB>3</SUB><SUP>-</SUP> (IO<SUB>4</SUB><SUP>-</SUP>), organic iodides and other unknown species. The expulsion operations caused the unknown species to increase in relative abundance. This tendency was also noticed for iodine of higher concentration in 3 M-HNO<SUB>3</SUB>.
- 一般社団法人 日本原子力学会の論文
著者
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Takahashi Akira
Japan Atomic Energy Research Institute Dep. Of Fusion Plasma Research:(present Address) Toyo Denshi
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KOMAKI Yoshihide
Japan Atomic Energy Research Institute
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SAKURAI Tsutomu
Japan Atomic Energy Research Institute
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IZUMO Mishiroku
Japan Atomic Energy Research Institute
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