文档介绍:: .
原子能科学技成堆芯碎片床。熔融物的射流碎裂特性直接关乎堆
芯碎片床的冷却及再临界行为。本文基于线性稳定性理论、运动学方程和交界面修正拉普拉斯定律,推
导出考虑沸腾和凝固效应的熔融物射流表面不稳定性增长方程,建立了液态金属钠中熔融物射流碎裂
模型 并提出了典型环境中熔融物射流碎裂准则 随后使用熔融物射流碎裂模型对 实验结果进
, 。 COSA
行了对比分析。本研究结果将为钠冷快堆严重事故的评估论证提供可靠工具,对严重事故缓解措施的
设计也具有重要的指导意义和参考价值。
关键词 钠冷快堆 熔融燃料与冷却剂相互作用 射流碎裂 实验
: ; ; ;COSA
中图分类号 文献标志码
:TL333 :A
doi:10.7538/yzk.2022.youxian.0167
Theoretical Research on Fragmentation Characteristics
of Molten Corium Jet during Severe Accident
in Sodium-cooled Fast Reactor
GE Kui,ZHANG Yapei* ,TIAN Wenxi,SU Guanghui,QIU Suizheng
(School of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an710049,China)
Abstract: Under severe accident in sodium-cooled fast reactor (SFR),molten corium
may fall into the coolant and cause molten fuel-coolant interaction(MFCI).The molten
corium is fragmented and solidified to produce debris during MFCI.The debris is reloca-
ted on the core catcher or lower head to form core debris bed.The coolability and recrit-
icality of core debris bed are significantly affected by the fragmentation characteristics of
molten corium jet.Based on the linear stability theory,kinematic equations and modi-
fied Laplace’s law at the contact interface,the growth of surface disturbance of molten