Research on the nuclear fuel rods melting behaviors by alternative material experiments

Deep learning health management diagnostics applied to the NIST smoke experiments

“…Given all this, it is not a surprise that these are the models that produced the lowest accuracies. While each model may produce results that are better than the other, it is mostly meaningless in the sense that neither model produces accuracies high enough to be practically usable (Chen et al, 2018;Chen et al, 2019;Chen et al, 2020a;Chen et al, 2020b;Li et al, 2022).…”

Simulation of the key phenomena in nuclear reactor two-phase flow and severe accident with particle method

“…的液滴流、 薄膜流和溪状流等行为特征 [17] ， PANDA-SA 模拟结果与实验结果符合较好，如图 4(b)所示。如 图 5(a)所示，针对堆芯材料的共晶熔化现象开发了 共晶反应模型，对揭示反应堆堆芯熔化事故机理具有 重要意义 [14] ；如图 5(b)所示，针对堆芯熔融物在反 应堆内的迁移行为开发了熔融物流动凝固模型，通过 L 形板流动凝固实验对模型进行了验证；如图 5(c) 所示，针对存在大量离散固体和流体耦合作用的运动 过程开发了夹带流动流固耦合模型，具备模拟堆芯熔 融物夹带未熔化固体材料迁徙扩展的能力 [18] ；如图 5 (d)所示，对弹性固体在流固耦合作用下的变形行为 开发了机械变形模型，具备对反应堆内结构变形工况 的模拟能力 [2] 。 (a) 图 4 FROMA 实验装置及部分实验结果. (a) FROMA 实验装置示意图 [19] ; (b) FROMA 实验烛化行为模拟 [17]…”