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

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

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.