工艺尾气氚测量装置的研制

通过选择装置材料、优化结构及参数,设计制作了有效体积为11.0 mL的测氚电离室,用于工艺尾气中氚含量的测量。用质谱法标定绘制了工作曲线,工作曲线线性范围为0.013 4%～0.168%(体积)。测试表明:装置泄漏率为5.5×10^-7 Pa·m³/s,密封性良好;本底电流为2.98×10^-14A;装置探测下限值为1.35×10^-4 %(体积);变异系数≤1.50%;仪器响应时间≤10 s,响应速度快,测量周期短,满足工艺样品的检测需求。

Development of a measuring device for tritium in process

Measuring device for tritium in process exhaust using ionization chamber (effective volume 11.0 mL) was developed after material selection, structure design and parameter optimization. The calibration curve was plotted with a good linearity in the range of 0.013 4%—0.168% (v). The results showed that the detection lower limit of the device was 1.35×10^-4 %(v); the coefficient of variation was no more than 1.50%; and the response time was less than 10 s. The process measurement requirements were fairly met.