Oxidation of Fuel Rod under Dry Storage Condition.

DOI 20 References
  • NAKAMURA Jinichi
    Tokai Research Establishment, Japan Atomic Energy Research Institute
  • OTOMO Takayshi
    Tokai Research Establishment, Japan Atomic Energy Research Institute
  • KIKUCHI Teruco
    Tokai Research Establishment, Japan Atomic Energy Research Institute
  • KAWASAKI Satoru
    Tokai Research Establishment, Japan Atomic Energy Research Institute

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Abstract

Oxidation tests of irradiated and un-irradiated rod with an artificial defect hole were performed in air and air-argon mixed gas between 473K and 513K to study the oxidation behavior of damaged fuel rod during dry storage. Rods oxidized in air showed diameter increase due to volume expansion caused by the generation of U3O8 and the cladding of irradiated rod was broken after the diameter increase had reached about 2%. X-ray diffraction and metallography showed that the oxidation of irradiated UO2 pellet occurred preferentially at the grain boundary and that the crystal structure corresponding to U4O9 remained stable even after about 11, 200h oxidation in air at 473K. It was suggested that the difference of the oxidation between irradiated and un-irradiated rods was due to FP gas bubble accumulation at grain boundary and FP accumulation in UO2 matrix.<BR>The oxidation rate of fuel rod in air-argon mixed gas was lower than that in air irrespective of irradiation. The irradiated rod in low oxygen partial pressure showed very little deformation.

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Details 詳細情報について

  • CRID
    1390282679072248320
  • NII Article ID
    10002072385
  • NII Book ID
    AA00703720
  • DOI
    10.3327/jnst.32.321
  • COI
    1:CAS:528:DyaK2MXltFakur8%3D
  • ISSN
    18811248
    00223131
  • Text Lang
    en
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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