低温堆和沸水堆流动不稳定因素比较分析  

Factor Analysis of Flow Instability between Heating Reactor and Boiling Reactor

作　　者：杨星团[1] 姜胜耀[1] 张佑杰[1] 

机构地区：[1]清华大学核能技术设计研究院先进反应堆工程与安全教育部重点实验室,北京100084

出　　处：《核动力工程》2002年第2期5-9,共5页Nuclear Power Engineering

摘　　要：在实验的基础上分析了低压低干度自然循环系统中欠热沸腾、冷凝、闪蒸、以及汽空间压力等因素对两相流动不稳定的影响,并与沸水堆条件下的情况作了比较。分析表明:①自然循环系统中,欠热沸腾、冷凝、闪蒸是影响流动不稳定的重要因素,很多不稳定问题与此有关,这跟以沸水堆为背景的强迫循环系统有很大不同;②汽空间大小对系统稳定性有重要作用,在压力允许条件下,应尽量减小汽空间,提高系统稳定性。The affections on instability of sub-cooled boiling, condensation, flashing, and steam-space pressure equilibrium, have been analyzed on the base of experimental results in natural circulation system with low pressure and low steam quality, and compared with those of boiling reactor. The analysis shows: Sub-cooled boiling, condensation and flashing play an important role on the flow instabilities in a natural circulation system, and have connection with lots of instabilities, which is different to the forced circulation system; the size of steam-space is important to the system stability. In order to improve it, the size of steam-space should be small to the best of its ability, if the system can support the large pressure.

关 键 词：低温堆 沸水堆 欠热沸腾 闪蒸 自然循环 流动稳定性 

分 类 号：TL334[核科学技术—核技术及应用]