哈尔滨工程大学学报Issue(4)：437-444,498,9.DOI:10.3969/j.issn.1006-7043.201303026
压力容器外部冷却两相自然循环特性理论分析
Theoretical analysis of the properties of the two-phase natural circulation of ERVC
摘要
Abstract
Focusing on the problem of two-phase natural circulation flow inside the loop-shape passage between the outside of the lower head of the reactor vessel and the inside of the insulator in times of severe accidents, an analy-sis program for one-dimensional steady-state natural circulation under the external reactor vessel cooling ( ERVC ) condition was done by utilizing the FORTRAN language. The effects of the calculation formulae of different friction coefficients on mass flow and void fraction of the two-phase natural circulation flow were studied. The results were compared with those obtained in the Chinese REPEC ( reactor pressure vessel external cooling) experiment and the RELAP5 simulation, and the feasibility of the program was demonstrated. A sensitivity analysis was performed for the important thermal-hydraulic and configuration parameters of the ERVC system, and the following conclusion was obtained:The inlet subcooling has a significant impact on the two-phase flow in the ERVC system. When the sub-cooling becomes close to the saturated value, the flow will reach the peak value. The inlet area, gap width and flooding height will influence the flow peak value of the quality flow. When the subcooling is higher than the sub-cooling corresponding to the flow peak, the flow will decrease following the increase of the subcooling, and contrari-wise, the flow increases as subcooling increases. These results may provide a simple and convenient method for as-sessing the design and operation parameters of the ERVC system.关键词
ERVC/两相自然流动/一维稳态/质量流量/空泡份额/过冷度Key words
ERVC/two-phase natural flow/one-dimensional steady-state/mass flow/void fraction/subcooling分类
能源科技引用本文复制引用
赵国志,曹欣荣,石兴伟..压力容器外部冷却两相自然循环特性理论分析[J].哈尔滨工程大学学报,2014,(4):437-444,498,9.基金项目
核电厂严重事故安全审评关键技术研究合作资助项目（201301-WXHT-05-1）． （）
