Preliminary analysis of HTGR core with DYN3D nodal diffusion code


Preliminary analysis of HTGR core with DYN3D nodal diffusion code

Fridman, E.; Kliem, S.; Rohde, U.

DYN3D is an advanced nodal code for the three-dimensional steady-state and transient analysis of LWR cores with quadratic and hexagonal fuel assemblies. Although a new version of DYN3D for the simulation of block type High Temperature Gas cooled Reactors (HTGR) is currently under development, the main objective of this work is to demonstrate the applicability of the standard DYN3D version for the steady-state analysis of HTGR core. A preliminary reactor physic analysis procedure in which few group cross section sets are generated using HELIOS 1.9 transport lattice code and full core calculations are performed by DYN3D will be established. The Reactivity equivalent Physical Transformation (RPT) approach will be applied in order to eliminate the double-heterogeneity of HTGR fuel elements in HELIOS calculations. The full core analysis of the reference simplified HTGR core will be performed with DYN3D using macroscopic nodal cross sections provided by HELIOS. At this stage thermo-hydraulic feedback is not considered. The results of DYN3D calculations such as neutron multiplication factor, radial and axial power distribution, will be compared with those obtained from reference full core MCNP simulation.

Keywords: HTGR full core analysis; DYN3D; MCNP; HELIOS

  • Contribution to proceedings
    5th International Topical Meeting on High Temperature Reactor Technology, 18.-20.10.2010, Prague, Czech Republic
    Preliminary analysis of HTGR core with DYN3D nodal diffusion code
  • Lecture (Conference)
    5th International Topical Meeting on High Temperature Reactor Technology, 18.-20.10.2010, Czech Republic, Prague

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Publ.-Id: 14335