| 摘要 |
PROBLEM TO BE SOLVED: To calculate radioactive ray data of a structure around a nuclear reactor of an electricity generation boiling-water reactor with high accuracy by using a two-dimensional discrete coordinate Sn calculation code.SOLUTION: At step S06A, (r,z) coordinate-dependent radioactive ray data in a noticing mesh is calculated on the basis of (r,z) coordinate-dependent neutron flux and γ-ray flux in an R-Z system. At step S06B, (r,&thetas;) coordinate-dependent radioactive ray data in the noticing mesh is calculated on the basis of (r,&thetas;) coordinate-dependent neutron flux and γ-ray flux in the R-Z system. At step S07, (r,&thetas;) coordinate-dependent radioactive ray data in the noticing mesh is integrated in a &thetas; direction so as to calculate an average value of radioactive data, and at step S08A, a correction coefficient Θ(r,&thetas;) is calculated. At step S09, the (r,z) coordinate-dependent radioactive ray data in the noticing mesh calculated at step S06A is multiplied by the correction coefficient Θ(r,&thetas;) so as to calculate (r,&thetas;,z) coordinate-dependent radioactive ray data in the noticing mesh. |
