Thermochemical Prediction of Chemical Form Distributions of Fission Products in LWR Oxide Fuels Irradiated to High Burnup

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<BR>Based on the result of micro-gamma scanning of a fuel pin irradiated to high burnup in a commercial PWR, the radial distribution of chemical forms of fission products (FPs) in LWR fuel pins was theoretically predicted by a thermochemical computer code SOLGASMIX-PV. The absolute amounts of fission products generated in the fuel was calculated by ORIGEN-2 code, and the radial distributions of temperature and oxygen potential were calculated by taking the neutron depression and oxygen redistribution in the fuel into account. <BR>A fuel pellet was radially divided into 51 sections and chemical forms of FPs were calculated in each section. In addition, the effects of linear heat rating (LHR) and average O/U ratio on radial distribution of chemical form were evaluated. <BR>It was found that approximately 13mole% of the total amount of Cs compounds exists as CsI and virtually remaining fraction as Cs2MoO4 under the operation condition of LHR below 400W/cm. On the other hand, when LHR is beyond 400W/cm under the transient operation condition, its distribution did not change so much from the one under normal operation condition.

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  • Journal of nuclear science and technology  

    Journal of nuclear science and technology 34(9), 900-908, 1997-09-25 

    Atomic Energy Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002078068
  • NII書誌ID(NCID)
    AA00703720
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00223131
  • NDL 記事登録ID
    4307551
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z53-A460
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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