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Decontamination Process by High Density Active Atoms in An Atmosheric-Pressure Plasma

Research Project

Project/Area Number 09480097
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field エネルギー学一般・原子力学
Research InstitutionTokyo Institute of Technology

Principal Investigator

SUZUKI Masaaki  Faculty of Engineering, TOKYO INSTITUTE OF TECHNOLOGY : Associate Professor, 工学部, 助教授 (70114874)

Co-Investigator(Kenkyū-buntansha) SEKIGUCHI Hidetoshi  Faculty of Engineering, TOKYO INSTITUTE OF TECHNOLOGY : Associate Professor, 工学部(平成10年4月より), 助教授 (50226643)
AKATSUKA Hiroshi  Res.Lab.for Nuclear Reactors, TOKYO INSTITUTE OF TECHNOLOGY : Associate Professo, 原子炉工学研究所, 助教授 (50231808)
EZOUBTCHENKO Alexandre  Res.Lab.for Nuclear Reactors, TOKYO INSTITUTE OF TECHNOLOGY : Research Associate (40293063)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 1998: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1997: ¥5,900,000 (Direct Cost: ¥5,900,000)
KeywordsDecontamination / Etching / Plasma process
Research Abstract

A special feature of our microwave heated plasma generator has been shown as a source of high concentration reactive atoms in the discharge of molecular gases. The mixed feed gas which is consists of CF_4 arid O_2 and flow rates was used for decontamibnation experiments, considering the stability of microwave discharge and the efficiency of radical generation into account And also the input power of microwave about 1.5 kW was chosen. As the substance which is decontaminated cobbalt oxide was used. Some drops of the solution of cobalt nitride with known concentration was dropped on a sample stainless steal plate (SUS304). After the weight drops was measured precisely, the plate was heated up to 500 。C and maintained at the same temp earature during 1 hour. Thus the black colored spot of cobalt oxide stained on the plate. For the measurements of cobalt ICP was used after dissolved into HCl solution. As a result, cobalt can be removed from the surface almost -100% at 250 seconds of decontamination time. Obtained decontamination efficiency is higher than reference value in the cobalt decontamination experiments which was carried out in low pressure. Also thermody namic modelling calculation was carried out for other elements, namely, Lanthanide (La, Gd) and Actinide (U,Pu) and the possibility of this application was described. From these results it was concluded that the method which we suggested is very powerful and has a large potential for practical use.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] M.Suzuki et al.: "Application of Microwave Heated Plasma to Vitritication and Decontamination Process" Proc.of The 3rd Japan-Korea Seminar on Advanced Reactors, Seoul. 167-173 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Suzuki et al: "Application Possibilities of Microwave Heated Plasma" Proc.Regional Symp.Chem., Eng.Manila. 399-405 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Suzuki et al.: "Application of Microwave Heated Plasma to Vitrification and Decontamination Processes" Proc.of The 3rd Japan-Korea Seminar on Advanced Reactors. 167-173 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Suzuki et al.: "Application Possibilities of Microwave Heated Plasma" Proc.Regional Symp.Chem., Eng.399-405 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Suzuki et al.: "Decontamination by Atmospheric-Pressure Microwave Plasma" Nucl.Sci.Tech.(submitted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Suzuki et al.: "Application of Microwave Heated Plasma to Vitrification and Deeontamination Process" Proc.of The 3rd Japan-Korea Seminar on Advanced Reactors.Seoul. 167-173 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Suzuki et al.: "Application Possibilities of Microwave Heated Plasma" Proc.Regional Symp.Chem.Eng.Manila. 399-405 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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