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以核电厂压水堆中失水事故(LOCA)堆芯紧急安注系统(ECCS)启动后安注接管与冷管段的T型管处冷、热流体混合为研究对象,进行安注管和主管道内过冷水-高温冷却剂的热混合特性实验以及过冷水-汽水混合物直接接触冷凝特性实验,通过缩比尺寸实验对热混合相关现象进行研究。结果表明,单相热混合实验管内温度场随不同射流流型成一定分布;两相热混合工况安注后冷凝量随主管蒸汽量变化而成线性分布,并总结实验数据形成适用于本实验直接接触冷凝相关关系式。
Taking the mixing of cold and hot fluids at the T-pipe of the safety takeover and cold-pipe sections after the LOCA core ECAS emergency start-up (ECA) as the research object, Experimental study on the hot mix characteristics of the supercooled water in the tunnel and the hot mix of the hot coolants and the direct contact of the supercooled water and the soda mixture on the condensation characteristics were carried out. The results show that the temperature field in the single-phase hot-mixing experiment tube is distributed with different jet flow patterns. The condensing amount of the two-phase hot-mix working conditions after the injection is linearly distributed with the variation of the main steam quantity. The experimental data are summarized to be suitable for this experiment Direct contact with condensation related.