[en] An assessment tool for a nuclear fuel with high decay heat and high radioactivity is required to establish fast reactor system with transuranium (TRU) fuel containing minor actinides. The energy resolving pulsed neutron imaging technique is a powerful tool for non-destructive testing of the nuclear fuel pellet. In the present study, the neutron resonance imaging was applied to identify the nuclear nuclides in the sample and to investigate its spatial distribution. The experiments using nuclear materials were conducted at electron linear accelerator (LINAC) in Research Reactor Institute, Kyoto University. Enriched and depleted U samples and Np sample were employed and 2-D information of time-of-flight (TOF) was measured by a boron-foiled gas electron multiplier (GEM) detector. Multiple peaks of the resonance absorptions of ²³⁸U and ²³⁷Np were observed in the neutron transmission spectrum and those distributions in the samples were obtained by the resonance images. (author)