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熔盐堆作为第四代核能系统堆型之一,液态燃料形态的特点使其可以实现在线处理和在线添料。为了提高中子经济性可以利用在线处理的氦鼓泡法,将氦气通入反应堆一回路,去除堆芯内的裂变气体(如Xe、Kr)。基于钍基熔盐液态堆(Thorium Molten Salt Reactor-Liquid Fuel1,TMSR-LF1)概念设计,结合熔盐实验堆(Molten Salt Reactor Experiment,MSRE)氙毒模型,分析了鼓泡法去除氙毒中~(135)Xe扩散规律和去除效率对氙毒的影响,并给出了对应的初始有效增殖因子的变化规律。分析结果表明,虽然存在~(135)Xe会大量向石墨扩散的可能性,但是鼓泡法仍然可以有效去除TMSR-LF1堆芯内的~(135)Xe,减小堆芯毒性,提高反应性。
Molten salt reactor as one of the fourth generation of nuclear energy system stack, the characteristics of the liquid fuel form it can be online processing and online Tim material. In order to improve the neutron economy, the helium bubbling method can be used to process the helium bubbling method. The helium gas is passed into the primary loop of the reactor to remove the fission gas (such as Xe, Kr) in the core. Based on the concept design of Thorium Molten Salt Reactor-Liquid Fuel1 (TMSR-LF1) and xenon toxicity model of Molten Salt Reactor Experiment (MSRE) (135) Effects of Xe Diffusion Law and Removal Efficiency on Xenotoxity and the Corresponding Rule of the Change of Initial Effective Proliferative Factors. The results show that although ~ (135) Xe is likely to diffuse to graphite in large quantities, the bubbling method can still effectively remove ~ (135) Xe in the core of TMSR-LF1, reduce the core toxicity and improve the reactivity .