Special sampling device for pressurized water reactor nuclear power plant primary circuit coolant

The utility model provides a special sampling device for a primary circuit coolant of a pressurized water reactor nuclear power plant. The special sampling device comprises a female head, a tee joint,a switch two-way valve, a 3/8 NPT external thread to 3/8 clamping sleeve and a male head, wherein the female joint, the tee joint, the 3/8NPT external thread to 3/8 clamping sleeve and the male jointare connected in sequence. And the other port of the tee joint is connected with one end of a switch two-way valve. A water outlet of the switch two-way valve is provided with a 3/8 stainless steel pipe for sampling. According to the utility model, the chemical sampling analysis efficiency can be improved, the sampling representativeness is good, and the real-time sampling function of the primaryloop coolant is realized. 本实用新型提供了一种压水堆核电厂一回路冷却剂专用取样装置，包括母头、三通、开关二通阀、3/8NPT外螺纹转3/8卡套管和公头。其中母头、三通、3/8NPT外螺纹转3/8卡套管和公头依次按顺序连接。三通的另一个端口连接开关二通阀的一端。开关二通阀的出水口设置有3/8不锈钢管，用于取样。本实用新型能够提高化学取样分析效率，取样代表性好，实现一回路冷却剂实时取样的功能。