Recycling Spent Nuclear Fuel Option for Nuclear Sustainability and more proliferation resistance In FBR

摘要

Spent nuclear fuels (SNF) from the reactors have some advantages to be used and recycled in term of reducing environmental impact from spent nuclear fuel as a waste, increasing sustainability of nuclear fuel as well as the concern of nuclear non-proliferation of nuclear fuel material. Recycling program of transuranic (TRU) is adopted and shows some advantages to be loaded into fast reactor has been investigated in this present study focus on sustainability nuclear fuel and nuclear non-proliferation aspect in fast breeder reactor (FBR). Actinide composition and isotopic plutonium aspect is based on a fast breeder reactor (FBR) type which is loaded by some different fuel composition in the core regions of FBR. The inventory mass ratio of higher burnup gives less inventory ratio for both plutonium and transuranium inventory ratios. In case of shorter cooling time process, transuranium inventory attains better inventory ratio than plutonium and for longer cooling time process, plutonium obtains better than transuranium. Transuranium fuel loading in UTRU fuel type gives significant contribution to increases more inventory ratio of plutonium in comparing with its plutonium production of MOX fuel type. In the same time, transuranium inventory ratio is also significantly reduced for transutanium fuel loading in the FBR core. In short, transuranium fuel loading can be estimated to produce more plutonium inventory and to reduce the composition of tranuranium or MA compostion in the core region. More compositions of even mass of plutonium isotopes are obtained for transuranium fuel loading such as Pu-238 and Pu-240. The increasing composition of even mas is considered to improve proliferation resistance level of FBR core in term of material barrier of plutonium isotopes. More MA fuel loading in transuranium fuel as well as longer reactor operation time will produce more even mass plutonium which affect to the increase of plutonium proliferation resistance level.