反应堆下腔室冷却剂流动特性数值分析  

Numerical Analysis of Coolant Flow Characteristics in Reactor Lower Plenum

作　　者：刘懿锐 张鑫[1] 袁江涛[1] LIU Yirui;ZHANG Xin;YUAN Jiangtao(Navy Submarine Academy,Qingdao 266199)

机构地区：[1]海军潜艇学院,青岛266199

出　　处：《舰船电子工程》2022年第3期158-161,共4页Ship Electronic Engineering

摘　　要：以小型反应堆堆芯入口处冷却剂流动情况、流量分配情况、下腔室搅混情况为研究对象,采用数值模拟的方法,对小型反应堆进行建模分析。研究表明,冷却剂在下降环腔各处流速差异较大,冷却剂会在左右两端发生汇聚后向下流动;下腔室下板孔处流量归一化因子极差可达0.268,冷却剂分配并不均匀;下腔室的搅混能力十分有限,冷却剂混合并不充分。Taking the coolant flow,flow distribution and lower plenum mixing at the core inlet of small reactor as the research object,the small reactor is modeled and analyzed by numerical simulation method.The results show that there is a great difference in the velocity of coolant in the falling ring cavity,and the coolant will converge at the left and right ends and flow downward.The range of flow normalization factor at the lower plate hole of the lower plenum can reach 0.268,and the coolant distribution is not uniform.The mixing capacity of the lower plenum is very limited,and the coolant mixing is not sufficient.

关 键 词：小型船用反应堆 下腔室 流动特性 CFD 

分 类 号：U664.151[交通运输工程—船舶及航道工程]