Analysis of Physical Performance of Two-Row Hexagonal Fuel Assembly for SCWR
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摘要: 重点考虑组件的均匀慢化和充分慢化性能,兼顾组件的结构和热工因素的影响,提出了超临界水冷堆(SCWR)双排六边形燃料组件概念设计方案。基于优化的双排六边形燃料组件形式,选取可接受的组件结构材料及尺寸,考虑定位材料和控制棒导向管等因素的影响,评价了其物理性能。研究表明,双排六边形燃料组件概念能在均匀慢化和充分慢化之间达到较好的平衡,组件内所有燃料棒采用同一种燃料成分且不含可燃毒物,即可实现局部功率峰值因子小于1.10的设计目标。Abstract: A new hexagonal fuel assembly（FA） design which has two rows of fuel rods between the hexagonal moderator channels is proposed for the thermal supercritical water cooled reactor（SCWR）.The two-row hexagonal fuel assembly concept is first and foremost considered for the performance of uniform moderation and sufficient moderation,and with the respect of structural performance and thermal-hydraulic performance.The physical performance of the two-row hexagonal FA with acceptable configuration is investigated.The results show clearly that a better balance between uniform moderation and sufficient moderation can be obtained in the two-row hexagonal fuel assembly.The design objective of the local power peaking factor less than 1.10 can be achieved under the condition of using the same enrichment fuel and containing no burnable poison.
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