Status of Deterministic Transport Code Development at UNIST

At the end of this work, case test results are presented for both PWR and VHTR system. The library generation process and resonance treatment method in the deterministic transport code in UNIST has been summarized. The code shows reasonable results of keff compared to Monte Carlo results for pin cell problems. Deterministic transport code has been developed at UNIST. The code uses the method of characteristics (MOC) for neutron transport analysis. The MOC can provide accurate numerical solutions when accurate multi-group cross section library is given. In this work, nuclear library generation process and implemented resonance treatment method are presented. The code can cover PWR and VHTR system. NJOY code system and RMET21 are used to generate self-shielded cross section and resonance parameter. Equivalence theory is adopted in the code as a resonance treatment method. Additionally, Doubly-heterogeneous (DH) self-shielding method is implemented in the code to consider double heterogeneity of fuel in VHTR