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Arief Rahman Hakim,Andang Widi Harto,Alexander Agung 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.1
One of proposed Accident Tolerant Fuel (ATF) concept is fully ceramic micro-encapsulated fuel (FCMF). FCMF using uranium mononitride (UN) has better safety aspects than UO2 pellet fuel although it mightnot have a better neutronic performance due to the presence of matrix and high neutron-inducedinteraction of 14N. Before implementing UN-FCMF technology in Small-PWR, further research must betaken place to make sure the proposed design of fuel assembly has inherent safety features and maintainthe fuel performance. This study focusses on the neutronic analysis of UN-FCMF based fuel assemblyusing Serpent and SCALE codes. It is shown in the proposed fuel assembly design has inherent safetyfeatures with respect to the fuel temperature reactivity coefficient, void reactivity coefficient, andmoderator temperature reactivity coefficient. It is noted that the use of FCMF leads to a lower ratio ofburnup to 235U enrichment ratio compared to the UO2/Zr fue