Reactor Physics Characterization of Transmutation Targeting Options in a Sodium Fast Reactor.

Bays, S. E.

Technical Information Center Oak Ridge Tennessee

关键词: Sodium fast reactors;    Transmutation;    Nuclear fuels;    Actinide;    Pancake;   

RP-ID  :  DE2008911956

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

In sodium fast reactor designs, the fuel related inherent negative reactivity feedback is accomplished mainly through parasitic capture in U-238. However for an efficient minor actinide burning system, it is desirable to reduce or eliminate U-238 entirely to suppress further transuranic actinide generation. Consequently, reactivity feedback is accomplished by enhancing axial neutron streaming during a loss of coolant void situation. This is done by flattening pancake the active core geometry. Flattening the reactor also increases axial leakage which removes neutrons that could otherwise be used to destroy minor actinides. Therefore, it is important to tailor the neutron spectrum in the core for optimized feedback and minor actinide destruction simultaneously by using minor actinide and fission product targets.