Migration of Cobalt-60 through Aerated Zone under Discontinuous Flow Condition.
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概要
- 論文の詳細を見る
In a natural aerated zone, infiltrated water flows discontinuously because of repeated cycles of rainfall and evaporation. In order to study migration behavior of radionuclides in the aerated zone, migration experiment of <SUP>60</SUP>Co was carried out by a column method, in which deionized water was fed intermittently into sandy soil layer contaminated with <SUP>60</SUP>Co.<BR>The <SUP>60</SUP>Co concentration in the deeper soil layer increased when the times of flow interrup-tion increased. It is very likely that this was attributed to the increase of movable {<SUP>60</SUP>Co(OH)<SUB>2</SUB>}n which was formed by pH-rise in the interstitial water during the interrupted period due to buffer action of the soil. A filtration model was developed and was found to be adapted to the concentration distribution of {<SUP>60</SUP>Co(OH)<SUB>2</SUB>}n fraction ; the amount of {60Co(OH)2}, , was esti-mated. It was concluded that about 1% of sorbed cationic <SUP>60</SUP>Co was changed to {<SUP>60</SUP>Co(OH)<SUB>2</SUB>}n by one time of the interruption.
- 一般社団法人 日本原子力学会の論文
著者
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Tanaka Tadao
Department Of Environmental Safety Research Japan Atomic Energy Research Institute
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Yamamoto Tadatoshi
Department Of Environmental Safety Research Tokai Research Establishment Japan Atomic Energy Researc
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YAMAMOTO Tadatoshi
Department of Environmental Safety Research, Japan Atomic Energy Research Institute
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- Migration of Cobalt-60 through Aerated Zone under Discontinuous Flow Condition.