[en] This paper presents a preliminary study on nuclear characteristics of plutonium burning with High Temperature Gas-Cooled Reactor (HTR). The following information is obtained from comparison of features of HTR and cell burn-up calculations with the use of HTR fuel: (1) HTR has good potential for plutonium utilization. (2) Core property changes at around the same quantity of plutonium as fissile uranium. (3) In the case of small size HTR, plutonium loading of 0.5% in fuel volume is feasible without any serious influence on basic characteristics. Plutonium loading of 0.1% causes no problems, and improves burn-up characteristics. (4) The quality of plutonium becomes poor in the discharged fuel. (author)