Study on material attractiveness aspect of spent nuclear fuel of LWR and FBR cycles based on isotopic plutonium production

•The paper analyzes the plutonium production of recycling nuclear fuel option.•To evaluate material attractiveness based on intrinsic feature of material barrier.•Evaluation based on isotopic plutonium composition of spent fuel LWR and FBR.•Even mass number of plutonium gives a significant contribution to material barrier, in particular Pu-238 and Pu-240.•Doping MA in FBR blanket is effective to increase material barrier from weapon grade plutonium to more than MOX fuel grade.