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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。
Existing supercritical water cooled reactor (SCWR) fuel assemblies address the problem of inadequate neutron moderation through the use of a “water rod” assembly design but pose a significant challenge to the engineering feasibility of assembly and core designs . Proposed mixed moderation fuel assembly, the use of non-fuel flow through the heating zone and the fuel zone moderator mixed mode of solid moderator designed to completely cancel the assembly “water rod” design purposes, to achieve the supercritical water-cooled reactor assembly Simplify design. Computational analysis shows that the hybrid moderated fuel assemblies are not only relatively simple to design, but also have higher economy and safety than the “water sticks”.