ORNL 10MW熔盐实验堆(MSRE)排盐罐冷却系统热工水力特性分析  

Thermal-hydraulic analysis of bayonet cooling thimble in fuel drain tank of ORNL 10MW MSRE

作　　者：孙露[1] 孙立成[1] 阎昌琪[1] 

机构地区：[1]哈尔滨工程大学核科学与技术学院,哈尔滨150001

出　　处：《核技术》2012年第10期790-794,共5页Nuclear Techniques

摘　　要：熔盐堆以液态熔盐为燃料,停堆后熔盐排入排盐罐中,余热排出系统利用排盐罐中冷却套管内的循环冷却水将余热导出。本文针对美国10 MW熔盐实验堆(MSRE)排盐罐套管式换热元件的结构特点,分析了套管气隙层宽度以及冷却水上升环腔宽度对系统功率、自然循环过程等的影响。计算结果表明,当气隙层宽度在3.1–5.1 mm时,系统冷却功率及循环流量相差均在5%内,对系统影响不大;当冷却水上升环腔宽度从3.6mm增至5.1 mm时,系统循环流量从1.9 kg/s增至4.79 kg/s,换热功率变化不明显。The residual heat removal system of molten salt reactor designed by ORNL, using molten salt as fuel and draining the fuel into fuel drain tank after shutdown of the reactor, removes the decay heat by the circulation of water through the bayonet cooling thimbles in the fuel drain tank. According to structural features of the bayonet cooling thimbles in ORNL 10 MW molten salt reactor experiment （MSRE）, this paper presents the analytical results of the influence of the width of gas gap and the width of steam riser on the heat removal ability and the natural circulation of the cooling water, etc. The analysis results show that, when the width of gas gap range from 3.1 mm to 5.1 mm, the change of heat dissipation power and natural circulation flow rate are both less than 5%; when the width of steam riser changes from 3.6 mm to 5.1 mm, the flow mass of the natural circulation change from 1.9 kg/s to 4.79 kg/s, with a slightly effect on the heat transfer efficiency of the system.

关 键 词：熔盐堆 排盐罐 冷却套管 热工水力特性分析 

分 类 号：TL334[核科学技术—核技术及应用]