| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for three-dimensional reactor core analysis which puts a low load on computers and also makes it possible to conduct accurate reactor core analysis. SOLUTION: This is a method for three-dimensional reactor core analysis to analyze the behavior of neutrons inside three-dimensionally shaped fuel rod models 1 in a system where a reactor core equipped with fuel rods is divided into the fuel rod models 1. Then, an angle neutron flux is figured out by prescribing the track of the neutrons passing a flat plane of the fuel rod models at a certain azimuthΨwith straight-line paths 2, generating a plane domain (p) from the straight-line paths 2 and carrying out the calculation on all the straight-line paths 2 to figure out a plane neutron flux from an incoming neutron flux and an outgoing neutron flux at a certain elevation angleθon the plane domain (p), and the three-dimensional neutron flux of a three-dimensional cell is figured out by carrying out similar calculations on azimuthsΨand the elevation angleθand angle integration. COPYRIGHT: (C)2008,JPO&INPIT
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