Experimental Verification and Analysis of Neutron Streaming Effect through Void Holes for Control Rod Insertion in HTTR

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Control rod columns of the High Temperature Engineering Test Reactor (HTTR) core have each three cylindrical void holes for insertion of the control rods. The reactivity worths of the simulated void holes were measured in the Very High Temperature Reactor Critical Assembly (VHTRC) by the pulsed neutron method with the purpose of evaluating the neutron streaming effect on the reactivity worths of the void holes. The reactivity worths were determined using the revised King-Simmons' formula. The measured results are compared with the calculated ones based on the nuclear data of ENDF/B-IV, using the Benoist's anisotropic neutron diffusion coefficients. It is concluded that the reactivity worths are enlarged up to about twice as large as that obtained using the conventional isotropic neutron diffusion coefficients, and it is also found that the neutron streaming effect that is defined as the relative fraction components exceeding the reactivity worths obtained by the conventional isotropic neutron diffusion coefficients are likely overestimated about 11 and 32% with the void holes being in the core and reflector regions, respectively. Then, the reactivity decrease due to the neutron streaming effect is able to be evaluated around 1%Δk for the initial critical core of the HTTR.

収録刊行物

  • Journal of nuclear science and technology

    Journal of nuclear science and technology 34(2), 185-192, 1997-02-25

    Atomic Energy Society of Japan

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被引用文献:  1件中 1-1件 を表示

  • HTTR環状炉心の炉心解析モデルの検討

    野尻 直喜 , 半田 雄一 , 島川 聡司 , 後藤 実 , 金子 義彦

    日本原子力学会和文論文誌 = Transactions of the Atomic Energy Society of Japan 5(3), 241-250, 2006-09-25

    参考文献21件

各種コード

  • NII論文ID(NAID)
    10002076512
  • 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
    4153652
  • 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  CJP引用  NDL  J-STAGE 
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