摘要
地坑滤网性能评价及下游效应分析中通常需要开展大破口失水事故(LOCA)喷放模拟实验。本研究采用双膜爆破片结合气动阀实现大破口LOCA喷放模拟实验启动压力的精确控制和高能流体的瞬间释放。压力测量结果表明:双膜放气启动压力损失最大,单膜启动压力爬升较慢,双膜充气启动在压力损失、压力爬升速度和压力精度上都能准确模拟大破口LOCA喷放物理过程。最后采用双膜充气启动方法对双壁盒式保温结构进行射流破坏试验,结果表明本装置提供的冲击力度足够。
The large LOCA blowdown simulation experiment is usually needed for the purpose of the performance evaluation of containment sump strainer and downstream effect analysis. In this paper, large LOCA blowdown simulation experiment was conducted by double rupture discs combining with a pneumatic valve, and the accurate controlling of starting pressure and the instantaneous release of high-energy fluid was realized. The measurement results of dynamic pressure indicate that the pressure lose of double discs bleed starting mode is the largest, and the total pressure rise velocity is relative slow for the single disc starting mode. Double discs charging starting mode can accurately simulate large LOCA blowdown physical process in term of pressure loss, pressure rise velocity and pressure accuracy. Finally, jet impinging destruction tests for double-wall encapsulated insulation configuration were carried out by double discs charging starting mode. The results indicate that the impact load supplied by the present facility is sufficient.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2016年第S2期146-149,共4页
Nuclear Power Engineering
关键词
大破口LOCA喷放模拟
启动方式
压力精度
压力爬升速度
射流破坏实验
Large LOCA blowdown simulation
Starting modes
Pressure accuracy
Pressure rise velocity
Jet impinging destruction tests
