含铅冷却剂气举泵的流体力学

T. Vereshchagina, V. Lemekhov, M. Morkin
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引用次数: 0

摘要

气举探头是透视式铅冷堆包层失效检测系统的重要组成部分。它的功能是局部测量气体裂变产物进入冷却剂的活性和缺陷燃料组件的定位。气体裂变产物从缺陷到活度测量地点的传递时间取决于冷却剂通过气升探头的流量。由于大多数裂变产物的半衰期很短,因此它们送到测量容器的时间应该是最短的。因此,计算冷却剂的流量,以及气体裂变产物在气升探头提升路径中的传递时间是一项实际任务。本文提出了一种含铅冷却剂气举探头液压系统的计算方法。给出了反应器气升探头内两相流动特性的计算结果和NIKIET实验装置中被测模型的计算结果。在相同的气体流量下,实验模型中的冷却剂流量与反应器探头中的冷却剂流量有显著差异。这些差异的原因是明确的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
HYDRODYNAMICS OF GAS-LIFT PUMP WITH LEAD COOLANT
A gas-lift probe is an element of cladding failure detection system of perspective lead cooled reactor. Its function is local measurement of gaseous fission product activity into coolant and the defective fuel assembly localization. The transit time of gaseous fission products from the defect to the place of activity measurement depends on the flow rate of the coolant through the gas-lift probe. Since most fission products have a short half-life period, their delivery time to the measuring vessel should be minimal. Therefore, the calculation of the flow rate of the coolant, as well as the transit time of gaseous fission products in the lifting path of the gas-lift probe is an actual task. A computational methodology of the hydraulics of the gas-lift probe with a lead coolant is presented in this work. The calculation results of two-phase flow characteristics in a reactor gas-lift probe and in the tested model in NIKIET experimental setup are presented. It is obtained the significant difference between the coolant flow rate in the tested model and in the reactor probe at the same gas flow rate. The reasons for these differences are defined.
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