Uptake of Heavy Water and Loss by Tangerine in the Heavy Water Vapor Release Experiment in a Greenhouse as a Substitute for Tritiated Water
- Ibaraki University (Japan)
- National Institute for Fusion Science (Japan)
Heavy water (D{sub 2}O) vapor release experiments were carried out in a greenhouse using deuterium as a substitute for tritium and uptake and loss kinetics of D{sub 2}O in leaf of a tangerine tree and formation, translocation and retention of organically bound deuterium (OBD) in tangerine exposed to D{sub 2}O under different growth stage were investigated. Rate constants of D{sub 2}O uptake in leaves of tangerine were 0.2-1.11 hr{sup -1} in the daytime release and 0.03-0.12 hr{sup -1} in the nighttime release. Rate constants of D{sub 2}O loss in leaf after daytime release were almost the same as those after the nighttime release. No significant differences in the half time of D{sub 2}O loss were observed between daytime and nighttime releases, but those in winter experiments were about 6 times higher than those in summer ones. The retention of OBD of the edible part of tangerine at harvest was very low and OBD was 0.08% or 0.07% on average of D{sub 2}O in air moisture in daytime or nighttime releases.
- OSTI ID:
- 20854257
- Journal Information:
- Fusion Science and Technology, Vol. 48, Issue 1; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); ISSN 1536-1055
- Country of Publication:
- United States
- Language:
- English
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