冷中子源氢慢化剂物态变化影响因素分析  

Analysis of Hydrogen Moderator Phase State Change at Cold Neutron Source

作　　者：兰晓华[1] 郑洲[1] 刘聪[1] 薛志彦 刘显坤[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621999

出　　处：《核电子学与探测技术》2015年第11期1070-1072,共3页Nuclear Electronics & Detection Technology

基　　金：中国工程物理研究院中子物理学重点实验室基金(2015BC06;2015CC01)资助

摘　　要：CMRR研究堆冷中子源以液氢作为中子慢化剂获取冷中子,低温氦气为制冷介质。论文实验对比了反应堆处于停止状态及低功率时氢的液化过程差异,研究了反应堆高功率对液氢汽化过程的影响,探讨了不同余热功率对于液氢自然蒸发速度的影响。实验结果表明:液氢的汽化过程平稳程度低于液化过程,易出现压力变化的跳跃,高强度的核辐射热会加速液氢的汽化。Ultra- cold liquid hydrogen was used as neutron moderator at CMRR cold neutron source. Low temperature helium gas worked as heat transmission medium for hydrogen. In this paper,low reactor power would affect hydrogen liquefaction process or not was investigated experimentally. Liquid hydrogen vaporization process parameters characteristics at different reactor conditions were demonstrated. What＇s more,liquid hydrogen spontaneous evaporation process were tested after different reactor power shutdown also. The results have shown that hydrogen liquefaction process was more smoothly than the vaporization process. Hydrogen pressure jump appeared occasionally in the process of vaporization. High strength heat radiation would accelerate the evaporation of liquid hydrogen.

关 键 词：冷中子源 慢化剂 液氢 反应堆功率 

分 类 号：TL99[核科学技术—核技术及应用]