Development of neutron transport calculation codes for 3-D hexagonal geometry; Development of NSHEX, MINIHEX and MINISTRI codes

Sugino, Kazuteru

Transport calculation codes for 3D hexagonal geometry have been developed: nodal code NSHEX, hexagonal-mesh finite difference code MINIHEX, and triangle-mesh finite difference code MINISTRI, which can perform neutron transport calculations with high accuracy for fast reactor cores. NSHEX is improved by extending the polynomial expansion order of intranode fluxes for better accuracy. MINIHEX is modified in the process of negative flux fix-up. In addition, MINISTRI is newly produced by changing the basic algorithm of MINIHEX. NSHEX, MINIHEX, and MINISTRI are applied to various fast reactor cores. It is found that these codes show satisfactory performance in terms of calculation accuracy. However, reduction of calculation time and improvement of convergence performance are required for all the codes by such measure as introduction of suitable acceleration technique. Further, development of post process functions is desired, which is represented by perturbation calculation scheme.

Language	:	Japanese
Report No.	:	JAEA-Data/Code 2011-018
Pages	:	125 Pages
Publication Year/Month	:	2012/01
Patent information	:
PDF	:	JAEA-Data-Code-2011-018.pdf:4.04MB
Paper URL	:	https://doi.org/10.11484/jaea-data-code-2011-018
Keywords	:	no keyword
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Registration No. : DC20110018
JAEA Abstracts No. : 40000267

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