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1995 Fiscal Year Final Research Report Summary

Mechanism of Tritium Gas Oxidation in the Environment

Research Project

Project/Area Number 06680474
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Nuclear fusion studies
Research InstitutionIBARAKI UNIVERSITY

Principal Investigator

ICHIMASA Michiko  Ibaraki Univ.Professor Fac.Sci., 理学部, 教授 (60007557)

Project Period (FY) 1994 – 1995
KeywordsTritium / Tritium gas / Soil Bacteria / airborne bacteria / 空中菌
Research Abstract

To determine what actually convert HT to tritiated water in the environment, soil and airborne bacteria were isolated from the soils and air in the test plots Chalk River Laboratories in Canada and the isolated strains were screened for HT oxidation activity. The number of HT-oxidizing bacteria isolated from soils was highest in the surface soils and the occurrence rates of HT-oxidizing bacteria in the soils different in depth were comparable with HT oxidation activity in the soils. These results indicated that these HT oxidizing bacteria play a dominant role in HT oxidation in soil. The occurrence rates of HT-oxidizing airborne bacteria were 2-4 %. The identification of some of HT-oxidizing soil and airborne bacteria was conducted and most of them were actinomycesas well as HT oxidizing soil bacteria. Isolation and identification of HT oxidizing bacteria from a moss and pine roots also conducted.

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] Ichimasa, et al.: "In vitro Determination of Age Dependence of Oxidation of Tritium Gas in Rats." Radiat. Proto. Dosim.53. 339-342 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ichimasa, et al.: "Suppression of Tritium Gas Oxidation in Rat by Norfloxacin and Clindamycin." Int. J. Radiat. Biol.67. 481-485 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ichimasa, et al.: "In vitro Determination of HT Oxidation Activity and Tritium Concentration in Soil and Vegetation Durin the Chronic HT Release Experiment at Chalk River." Fusion Technol.28. 877-882 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Davis, et al.: "Overview of the 1994 Chronic HT Release Experiment at Chalk River." Fusion Technol.28. 840-845 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Amano, et al.: "FormAtion of Organically Bound Tritium in Plants During the 1994 Chronic HT Release Experiment at Chalk River." Fusion Technol.28. 803-808 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Noguchi, et al.: "Tritium Behavior on a Cultivated Plot in the 1994 Chronic HT Release Experiment at Chalk River." Fusion Technol.28. 924-929 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 一政満子(9.3.3を分担執筆): "核融合研究II 核融合炉工学" 名古屋大学出版会, 1063 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ichimasa, et al.: "In vitro Determination of Age Dependence of Oxidation of Tritium Gas in Rats." Radiat.Proto.Dosim.53. 339-342 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ichimasa, et al.: "Suppression of Tritium Gas Oxidation in Rat by Norfloxacin and Clindamycin." Int.J.Radiat.Biol.67. 481-485 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ichimasa, et al.: "In vitro Determination of HT Oxidation Acitivity and Tritium Concentration in Soil and Vegetation Durin the Chronic HT Release Experiment at Chalk River." Fusion Technol.28. 877-882 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Davis, et al.: "Overview of the 1994 Chronic HT Release Exoeriment at Chalk River." Fusion Technol.28. 840-845 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Amano, et al.: "FormAtion of Organically Bound Tritium in Plants During the 1994 Chronic HT Release Experiment at Chalk River." Fusion Techol.28. 803-808 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Noguchi, et al.: "Tritium Behavior on a Cultivated Plot in the 1994 Chronic HT Release Experiment at Chalk River." Fusion Technol.28. 824-929 (1995)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1997-03-04  

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