Evaluation of neutron spectrum for pin-by-pin MA transmutation analysis by reconstruction of neutron flux distribution

Pin-by-pin MA transmutation is analyzed by proposed method which is based on the reconstruction of neutron flux distribution in heterogeneous MA target loaded core. The distribution of pin-by-pin transmutation is steep in the core since MA target assembly contains Zirconium-hydride rod for efficient transmutation. Proposed method reveals the detailed distribution of pin-by-pin MA transmutation for each nuclide. As for total amount of MA transmutation in the core, the difference between proposed method and homogenization method is not remarkable. (authors)