Development of two-step procedure for the prismatic VHTR physics analysis

Conference · Sat Jul 01 04:00:00 EDT 2006

OSTI ID:22039581

Kim, K S; Cho, J Y; Noh, J M; Zee, S Q ^[1]

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1. Korea Atomic Energy Research Inst., 150 Deokjin-dong, Yuseong-gu, Daejeon, 305-353 (Korea, Republic of)

Two-step procedure using the HELIOS/MASTER code system has been developed for the prismatic VHTR physics analysis. Double heterogeneity effect due to the random distribution of the particulate fuel was considered by using the recently developed reactivity-equivalent physical transformation (RPT) method. At the stage of a group constant generation, a strong spectral effect of the graphite moderated reactor core could be covered by both an optimization of the number of energy groups and boundaries, and a mini core model instead of a single block model. A new procedure to generate a reflector cross section has been developed to conserve a neutron leakage from the fuel region by using a simplified equivalence theory. A well-known two-step core analysis procedure has been established, where HELIOS is used for the transport lattice calculation and MASTER for the 3-D diffusion nodal core calculation. The applicability of our code system was tested against several core benchmark problems. The results of these benchmark tests show that our code system is very accurate and practical for the prismatic VHTR physics analysis. (authors)

• Research Organization: American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
• OSTI ID: 22039581
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
97 MATHEMATICS AND COMPUTING
BENCHMARKS
FUEL PARTICLES
GROUP CONSTANTS
H CODES
HTGR TYPE REACTORS
MULTIGROUP THEORY
NEUTRON DIFFUSION EQUATION
NEUTRON LEAKAGE
NODAL EXPANSION METHOD
OPTIMIZATION
REACTIVITY
REACTOR CORES
REACTOR LATTICE PARAMETERS