Re-emission of heavy water vapour from soil to the atmosphere

S. Yokoyama, H. Noguchi, Y. Ichimasa, M. Ichimasa

研究成果: Article査読

11 被引用数 (Scopus)

抄録

The re-emission process of tritiated water (HTO) deposited on a soil surface is an important process to assess tritium doses to the general public around nuclear fusion facilities in future. A field experiment using heavy water (HDO) as a substitute for HTO was carried out in the summertime to investigate the re-emission process of HTO from soil to the atmosphere. In the experiment, the time variations of depth profiles of HDO concentrations in soil exposed to HDO vapour and soil mixed with HDO were measured during the re-emission process on the field. The HDO concentrations in soil water in top soil layers of both the exposed and mixed soil rapidly decreased with time during the re-emission. However, the decrease of exposed soil was much greater than that of mixed soil. The re-emission process was analysed using a model including the evaporation of HDO from soil, the exchange between soil HDO and air H2O, and the diffusion of HDO in soil. It was found that the model is applicable to calculating the time variations of detailed depth profiles of HDO concentration in soil water in surface soil layers, using an estimated exchange velocity.

本文言語English
ページ(範囲)201-213
ページ数13
ジャーナルJournal of Environmental Radioactivity
71
3
DOI
出版ステータスPublished - 2004
外部発表はい

All Science Journal Classification (ASJC) codes

  • 環境化学
  • 廃棄物管理と処理
  • 汚染
  • 健康、毒物学および変異誘発

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