Optimization of Fuel Rod Enrichment Distribution to Minimize Rod Power Peaking throughout Life within BWR Fuel Assembly

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<BR>A practical method was developed for determining the optimum fuel enrichment distribution within a boiling water reactor fuel assembly. The method deals with two different optimization problems, i.e. a combinatorial optimization problem grouping fuel rods into a given number of rod groups with the same enrichment, and a problem determining an optimal enrichment for each fuel rod under the resultant rod-grouping pattern. In solving these problems, the primary goal is to minimize a predefined objective function over a given exposure period. The objective function used here is defined by a linear combination: C1X+C2XG, where X and XG stand for a control variable to give the constraint respectively for a local power peaking factor and a gadolinium rod power, and C1 and C2 are a user-definable weighting factor to accommodate the design preference. <BR>The algorithm of solving the combinatorial optimization problem starts with finding the optimal enrichment vector without any rod-grouping, and promising candidates of rod-grouping patterns are found by exhaustive enumeration based on the resulting fuel enrichment ordering, and then the latter problem is solved by using the method of approximation programming. The practical application of the present method is shown for a contemporary 8×8 Pu mixed-oxide fuel assembly with 10 gadolinium-poisoned rods.

収録刊行物

  • Journal of nuclear science and technology  

    Journal of nuclear science and technology 34(1), 5-12, 1997-01-25 

    Atomic Energy Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002076142
  • 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
    4131751
  • 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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