Transmutation of minor actinides in the pressurized water reactors

摘要: We study the effects of adding MA nuclides to PWR core and nuclide transmutation rate in PWRs. Our calculation results show that even 1% homogeneous addition nuclear fuel can reduce keff PWRs drastically. The uniform distribution uranium dioxide also affect lifetime a loading. Calculation indicate reactivity mismatch control difficulties spatial self-shielding heterogeneous distributions avoid initial drop significantly, be overcome. During 300-day-exposure 14.8% Pu-238 7.7% Pu-239 are created, this explains at least 22.5% transmute plutonium isotopes during by various processes. may incinerate plutonium-239 plutonium-238 subsequent MOX loading Alternatively, we use created fabricate batteries. mainly transmuted from neptunium-237 PWRs, constitutes 56.2% total minor actinides depleted majority commercial reactors operation world if get their power generating, inventory high level long-lived radioactive will greatly reduced. Our actually act as burnable poisons materials used partially substitute for or concentration boric acid coolant increase negative temperature coefficient This is distinct advantage characteristics flux thermal compared research.