高レベルガラス固化体の性能評価に関する研究:-現状と信頼性向上にむけて-  [in Japanese] Status of Studies on HLW Glass Performance for Confirming Its Validity in Assessment  [in Japanese]

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Abstract

地層処分における高レベルガラス固化体の性能評価の現状について, その信頼性向上の観点から総説した. ガラス固化体の水への溶解および核種浸出に関する現象理解は過去20-30年で大きく進展し, 現在までの成果を充分に活用することで保守的な性能評価は可能であると考えられる. しかしながら, 評価の信頼性向上の観点からは, 長期の処分期間におけるガラス溶解反応メカニズムや各国で異なる実際の処分環境の影響についての基礎科学的理解をさらに深めるとともに, それらの成果を充分に反映した性能評価モデルの構築が望まれる. これら基礎研究の進展は処分システム全体の性能評価の信頼性向上, さらには処分システムの合理性や経済性の向上にも寄与できるものと期待される. 我が国におけるガラス固化体の性能評価研究は, 米国, フランス等における多角的な研究と比較して充分なものとは言えず, さらなる拡充が望まれる.

  A review is given of the performance assessment of high-level radioactive waste (HLW) glass in geological disposal in an aspect of its validity. In the last few decades much progress has been made in understanding elementary reactions of HLW glass dissolution in contact with aqueous solutions and of associated radionuclide release. On the basis of the present knowledge, a conservative assessment of the glass performance can be made in geological disposal. For confirming its validity, however, more progress is required to be made in understanding reaction mechanism of the glass dissolution for the long-term of disposal period under the specific disposal conditions for each country. In addition to sound understanding of scientific basis for the glass dissolution described above, it is also essential to develop the glass performance model taking the scientific basis into account. Progress in these fundamental studies on the glass performance is expected to contribute to a valid assessment of the total system performance of disposal, which can lead to the reasonable and economical disposal. Studies on the glass performance at the present in Japan are less advanced than those conducted from various points of view in France and the United States. Further works are required for the valid assessment of the glass performance in Japan.

Journal

  • Journal of Nuclear Fuel Cycle and Environment

    Journal of Nuclear Fuel Cycle and Environment 10(1-2), 69-84, 2004

    Division of Nuclear Fuel Cycle and Environment, Atomic Energy Society of Japan

Cited by:  1

Codes

  • NII Article ID (NAID)
    130003378404
  • NII NACSIS-CAT ID (NCID)
    AA11891371
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    1884-7579
  • NDL Article ID
    7928154
  • NDL Source Classification
    ZN36(科学技術--原子力工学・工業)
  • NDL Call No.
    Z16-B456
  • Data Source
    CJPref  NDL  J-STAGE 
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