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超临界水冷堆混合慢化燃料组件设计
Design of mixed moderators' fuel assembly in SCWR
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摘要: 现有的超临界水冷堆(SCWR)燃料组件通过采用"水棒"组件设计方式,以解决中子慢化不足的问题,但对组件及堆芯设计方案的工程可行性带来巨大挑战.提出混合慢化燃料组件,利用未流经燃料区加热的冷却剂与燃料区内固体慢化剂的混合设计,达到完全取消组件"水棒"设计的目的,实现超临界水冷堆组件的简化设计.计算分析表明,与"水棒"组件相比,混合慢化燃料组件不仅设计相对简化,而且具有较高的经济性和安全性.Abstract: The existing supercritical water-cooled Reactor (SCWR) undertakes a design of water rod assembly to solve the problem of neutron moderator insufficiency.However, this brings a giant challenge to engineering feasibility of the assembly and reactor core designs.This article presents a design of utilizing an assembly with mixed moderators that adopts the coolant (not floated and heated through the fuel region) and the solid moderator in fuel region to achieve the design target of abolishing water rod completely and simplifying the assembly design of SCWR.On the basis of analysis and calculation, compared with the water rod assemly, the assemly with mixed moderators has advantages of simple design, high capability of economy and safety.
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