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

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

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)201-213
Number of pages13
JournalJournal of Environmental Radioactivity
Volume71
Issue number3
DOIs
Publication statusPublished - 01-01-2004
Externally publishedYes

Fingerprint

Deuterium Oxide
Heavy water
Steam
Atmosphere
Water vapor
water vapor
Soil
Soils
atmosphere
soil
soil water
Water
tritium
Nuclear Fusion
topsoil
soil surface
evaporation
Tritium
water

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Yokoyama, Sumi ; Noguchi, H. ; Ichimasa, Y. ; Ichimasa, M. / Re-emission of heavy water vapour from soil to the atmosphere. In: Journal of Environmental Radioactivity. 2004 ; Vol. 71, No. 3. pp. 201-213.
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Re-emission of heavy water vapour from soil to the atmosphere. / Yokoyama, Sumi; Noguchi, H.; Ichimasa, Y.; Ichimasa, M.

In: Journal of Environmental Radioactivity, Vol. 71, No. 3, 01.01.2004, p. 201-213.

Research output: Contribution to journalArticle

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