具有压力流量同步控制功能的高压水射流去污装置设计

Design of High Pressure Water Jet Decontamination Device with Pressure and Flow Synchronous Control Function

在核动力装置检修或者退役过程中,常常会应用高压水射流对现场的放射性污染进行去除。在常规高压水射流去污装置的基础上,提出了一种基于比例-积分-微分(PID)的电动调节控制,研究压力与流量单独控制在高压水射流去污中的应用。经过理论分析结合去污实验验证,结果表明:采用改进的流量与压力同步控制方法,在高压水射流去污过程中,在其他影响因素相同的情况下,采用较大的水流量,去污因子反而较小,但是这种变化趋势是趋于平缓的。因此,采用改进后的高压水射流去污装置在相同压力下达到相同的去污效果,可以明显减少二次放射性废液产生量,具有较高的市场应用价值。

In the process of maintenance or decommissioning of nuclear power plants, the high-pressure water jets are often used to remove the radioactive contamination from the site. Based on the conventional high-pressure water jet decontamination device, a proportional-integral-derivative(PID)-based electric adjustment control was proposed. The application of separate pressure and flow control in high-pressure water jet decontamination was studied. The results of theoretical analysis combined with decontamination laboratory verification show that: using the improved flow and pressure control methods, in the high-pressure water jet decontamination process, with the same other influencing factors, when a larger water flow rate is used to decontaminate, the decontamination factor is rather small, but this trend is tending to be gentle. Therefore, by adopting the improved high-pressure water jet decontamination device to achieve the same decontamination effect under the same pressure, the amount of secondary radioactive waste liquid generated can be significantly reduced, and this device is with high market application value.