Monte carlo evaluation of VHTR cell calculational model with emphasis on resonance integral.
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概要
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Effect of cell simplification on cell average constants are evaluated by a Monte Carlo method in order to provide a simplified very high temperature reactor (VHTR) design method. First, the applicability of the Monte Carlo method to the present work is verified by the experiment analysis of the VHTR mock-up critical core. Then a technique to separate the volume and surface terms of resonance integral based on the Monte Carlo method is developed by introducing Marchuk theory. The percentage contributions to the resonance integral of the VHTR fuel assembly are 60% from the surface term and 40% from the volume term. Finally, due to simplification of the hexagonal SHE-14 cell to an annular cell with equal fuel volume, the K<SUB>∞</SUB>-value is enlarged by 0.8% Δk/k as the result of a 7% decrease of surface area, i.e. 0.7% increment of the resonance escape probability. The contributions of individual resonances of <SUP>235</SUP>U and <SUP>238</SUP>U to these terms are also discussed.
- 一般社団法人 日本原子力学会の論文
著者
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Zukeran Atsushi
Energy Research Laboratory Hitachi Ltd.
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ZUKERAN Atsushi
Energy Research Laboratory, Hitachi Ltd.
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MARUYAMA Hiromi
Energy Research Laboratory Hitachi Ltd.
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MARUYAMA Hiromi
Energy Research Laboratory, Hitachi Ltd.
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ASAMI Masanobu
Nuclear Power Design Department, Kure Works, Babcock-Hitachi K.K.
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- Monte carlo evaluation of VHTR cell calculational model with emphasis on resonance integral.