一种降低CARR堆冷中子源氢系统中子慢化室内含气率的方法  

Method to Reduce Void Fraction in the Neutron Moderator Cell of CARR CNS

作　　者：万连利[1] 陈听宽[1] 毕勤成[1] 王海军[1] 冯全科[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,710049

出　　处：《核动力工程》2004年第6期499-504,共6页Nuclear Power Engineering

基　　金：国家自然科学基金项目(10375046)

摘　　要：CARR核功率达60MW;其慢化室中液氢产气量大,含气率高,对于系统的慢化能力、反应堆的安全等都有重大影响。为了降低慢化室与内筒间环形通道中的截面含气率,本文采取在慢化室内筒顶端开孔的措施,以导出慢化室内筒下部金属及液氢核发热产生的氢气。通过对一系列小直径短管的流量与压力关系的测量,获得了小直径短管的流量与压力关联式,并以此关联式为依据,得到了最佳开孔数与最佳直径。论证了此方法在核功率变化时的自我调节性与稳定性。The moderator cell is of great importance in CNS system, which is a main part of Chinese Advanced Research Reactor (CARR). Void fraction in the moderator cell has great influence on the moderation ability, safety of reactor and so on. In order to decrease the void fraction in the annular channel between the moderator cell and the inner cell, holes may be opened in the top of the inner cell, so that some hydrogen gas vaporized from liquid hydrogen under the inner cell can be discharged without flowing through the annular channel. After a series of measurement of the relation between pressure drop and mass flux in small diameter short pipes, a correlation was obtained, according to which the optimized number and diameter of holes are calculated. Moreover, self-adjusting ability and stability of this method at variable reactor powers is analyzed.

关 键 词：中国先进研究堆(CARR) 冷中子源系统(CNS) 含气率 中子慢化室 

分 类 号：TL411[核科学技术—核技术及应用]