某含石墨构件核设施氦气回路丝网气水分离器除湿工况研究

Study on Dehumidification Condition of Wire Mesh Gas-water Separator in Helium Circuit of a Nuclear Facility with Graphite Components

某核设施含石墨构件氦气回路在运行过程中需要严格控制水分含量,在工程建设期间该回路会吸附环境中的水分,为除去吸附水分需要使用氦气回路中的丝网气水分离器将水分除去,由于氦气回路的压力、密度、温度、气体流速等参数在系统充气升温过程中为非连续动态变化,导致在氦气回路升温升压过程中气水分离器无法保持在能够除湿的工况,更无法保证最佳除湿工况。为解决试验人员无法预估丝网气水分离器最佳除湿工况的问题,本文对氦气回路升温升压过程各种典型工况中氦气含水、密度、流速参数变化情况进行分析,确定偏离最佳除湿工况的规律和较好的除湿工况范围,为试验人员提供可操作工况范围。

The helium circuit with graphite components in a nuclear facility needs to strictly control the moisture content during operation.During the construction of the project,the loop will adsorb water in the environment.To remove the adsorbed water,it is necessary to use the mesh gas-water separator in the helium loop to remove the water.Because the parameters of the helium loop,such as pressure,density,temperature,gas flow rate,etc.,are non-continuous and dynamic changes in the process of inflation and temperature rise of the system,the gas-water separator can’t be kept in a dehumidifying condition during the temperature rise and pressure rise of the helium loop,and the optimal dehumidifying condition can’t be guaranteed.In order to solve the problem that the tester can’t predict the optimal dehumidification condition of the wire mesh gas-water separator,this paper analyzes the variation of helium water content,density and flow rate parameters in various typical conditions during the heating and boosting process of the helium loop,and determines the law of deviation from the optimal dehumidification condition and a better dehumidification condition range,so as to provide an operable condition range for the tester.