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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.1
- 수록면
- 13 - 30 (18page)
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This paper presents the recent improvements in the DeCART code for HTGR analysis. A new 190-groupDeCART cross-section library based on ENDF/B-VII.0 was generated using the KAERI library processingsystem for HTGR. Two methods for the eigen-mode adjoint flux calculation were implemented. Anazimuthal angle discretization method based on the Gaussian quadrature was implemented to reducethe error from the azimuthal angle discretization. A two-level parallelization using MPI and OpenMP wasadopted for massive parallel computations. A quadratic depletion solver was implemented to reduce theerror involved in the Gd depletion. A module to generate equivalent group constants was implementedfor the nodal codes. The capabilities of the DeCART code were improved for geometry handling includingan approximate treatment of a cylindrical outer boundary, an explicit border model, the R-G-B checkerboardmodel, and a super-cell model for a hexagonal geometry. The newly improved and implementedfunctionalities were verified against various numerical benchmarks such as OECD/MHTGR-350 benchmarkphase III problems, two-dimensional high temperature gas cooled reactor benchmark problemsderived from the MHTGR-350 reference design, and numerical benchmark problems based on thecompact nuclear power source experiment by comparing the DeCART solutions with the Monte-Carloreference solutions obtained using the McCARD code
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