Accuracy of cell calculation methods used for analysis of high conversion light water reactor lattice.

JEONG Chang-Joon, OKUMURA Keisuke, ISHIGURO Yukio, TANAKA Ken-ichi

doi:10.3327/jnst.27.515

Validation tests were made for the accuracy of cell calculation methods used in analyses of tight lattices of a mixed-oxide (MOX) fuel core in a high conversion light water reactor (HCLWR). A series of cell calculations was carried out for the lattices referred from an international HCLWR benchmark comparison, with emphasis placed on the resonance calculation methods; the NR, IR approximations, the collision probability method with ultra-fine energy group. Verification was also performed for the geometrical modelling ; a hexagonal/cylindrical cell, and the boundary condition ; mirror/white reflection. In the calculations, important reactor physics parameters, such as the neutron multiplication factor, the conversion ratio and the void coefficient, were evaluated using the above methods for various HCLWR lattices with different moderator to fuel volume ratios, fuel materials and fissile plutonium enrichments.<BR>The calculated results were compared with each other, and the accuracy and applicability of each method were clarified by comparison with continuous energy Monte Carlo calculations. It was verified that the accuracy of the IR approximation became worse when the neutron spectrum became harder. It was also concluded that the cylindrical cell model with the white boundary condition was not so suitable for MOX fuelled lattices, as for UO₂ fuelled lattices.

Accuracy of cell calculation methods used for analysis of high conversion light water reactor lattice.

抄録

収録刊行物

キーワード

詳細情報詳細情報について

書き出し

問題の指摘

Accuracy of cell calculation methods used for analysis of high conversion light water reactor lattice.

抄録

収録刊行物

キーワード

詳細情報 詳細情報について

書き出し

問題の指摘

参加プロジェクトリスト

詳細情報詳細情報について