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

Kang Seog Kim, Jin Young Cho, Jae Man Noh, Sung Quun Zee

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationPHYSOR-2006 - American Nuclear Society's Topical Meeting on Reactor Physics
StatePublished - 2006
Externally publishedYes
EventPHYSOR-2006 - American Nuclear Society's Topical Meeting on Reactor Physics - Vancouver, BC, Canada
Duration: Sep 10 2006Sep 14 2006

Publication series

NamePHYSOR-2006 - American Nuclear Society's Topical Meeting on Reactor Physics
Volume2006

Conference

ConferencePHYSOR-2006 - American Nuclear Society's Topical Meeting on Reactor Physics
Country/TerritoryCanada
CityVancouver, BC
Period09/10/0609/14/06

Keywords

  • Double heterogeneity
  • Equivalence theory
  • HELIOS
  • MASTER
  • Two-step procedure
  • VHTR

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