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Issues in three-dimensional depletion analysis of measured data near the end of a fuel rod

燃料棒端部付近から得られた測定データの3次元燃焼解析における課題

DeHart, M. D.*; Gauld, I. C.*; 須山 賢也

DeHart, M. D.*; Gauld, I. C.*; Suyama, Kenya

近年の計算機や計算手法の発達によって3次元燃焼計算が一般的に利用可能になりつつある。燃焼計算コードの評価では照射後試験で得られた同位体組成の解析を行うことが多いが、従来それは1次元あるいは2次元計算で対応できる場所から得られたデータの解析で行われてきた。燃料端部から得られた照射後試験データの解析には、端部周辺の情報が必要となる問題がある。本発表では3次元燃焼計算によりそれについて論じる。

It is becoming possible to use three dimension depletion calculation codes owing to the high speed computers in recent years and development of the sophisticated calculation method. In the past, evaluation of the depletion calculation codes has been carried out by the analysis of the isotopic composition data obtained by the Post Irradiation Examination from the positions which are suitable for one or two dimensional calculation method. For the analyses of isotopic composition data from the end region of fuel rods, we need other information of surrounding regions. This paper describes this problem based on the three dimensional depletion calculation.

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