Sedimentation Behavior of Mixed Solid Particles
Sedimentation Behavior of Mixed Solid Particles
复制标题
混合固体颗粒的沉降行为
DOI：
10.1080/00223131.2017.1419888
复制
发表时间：
2018
影响因子：
1.2
通讯作者：
T. SUZUKI
中科院分区：
文献类型：
--
作者：
MD A.R. SHEIKH;E. SON;M. KAMIYAMA;T. MORIOKA;T. MATSUMOTO;K. MORITA;K. MATSUBA;K. KAMIYAMA;T. SUZUKI
在钠冷快堆堆芯破坏事故的物质迁移阶段，从堆芯排出的碎片碎片沉降行为导致碎片床的形成，对于容器内滞留和安全问题至关重要。形成的床层的高度既会影响燃料衰变热对床层的冷却，也会影响中子特性。为了建立床层形成行为的实验数据库，采用模拟材料Al2O3、ZrO2和不锈钢进行了一系列实验，在重力驱动下将固体颗粒从喷嘴排出到静态圆柱形水池中。测量了不同粒径、密度和球形度的颗粒，以及不同直径、注射速度和注射高度的注射喷嘴的床层高度。从这些实验中，建立了一个经验关联来预测不同性质的均匀和混合颗粒的床层高度。这种相关性相当好地再现了本次实验和以往实验中确定的临界因素在床层高度上的实验趋势。
During the material relocation phase of core-disruptive accidents in sodium-cooled fast reactors, the sedimentation behavior of fragmented debris discharged from the reactor core into the lower plenum region leading to a debris-bed formation is crucial in regard to in-vessel retention and safety concerns. The height of the beds formed may influence both the cooling of the bed from the decay heat in the fuel and the neutronic characteristics. To develop an experimental database of bed formation behavior, a series of experiments using simulant materials, namely, Al2O3, ZrO2, and stainless steel, were performed under gravity-driven discharge of solid particles from a nozzle into a quiescent cylindrical water pool. The bed height was measured for particles of different size, density, and sphericity, and an injection nozzle with varying diameter, injection velocity, and injection height. From these experiments, an empirical correlation was established to predict the bed height for both homogeneous and mixed particles for the different properties. This correlation reproduces reasonably well the experimental trend in bed height with critical factors, which were identified in this and previous experiments.