便携式氚测量仪现场校准技术研究及装备研制

根据PVT方法研制了便携式氚测量仪现场校准装备。使用经检定的电离室装置对初始的氚气浓度进行了测量并作为校准装备的气源，根据PVT方法稀释配制了校准用的参考氚气，参考氚气浓度的不确定度为5.00%，满足EJ/T 1077-1998关于检验源的要求。使用放射性气体活度标准装置对配制的参考氚气进行了绝对测量，测量结果与理论计算结果相对误差为0.81%。并采用配制的参考氚气进行了便携式氚测量仪的校准测试，结果表明，便携式氚测量仪现场校准装备可以满足便携式氚测量仪的现场校准需求。

Technique and Development of Device for In-Situ Calibration of Portable Tritium Measurement Instruments

An in-situ calibration device of portable tritium measurement instruments based on PVT method was developed. The concentration of the initial tritium, which was the gas source of the device and was diluted to be the reference tritium gas according to the PVT method, was measured by the calibrated ionization chamber device and its uncertainty is 5.00%, which meet the requirements of EJ/T 1077-1998. The relative error of the concentration of the reference tritium gas between the measured result, which was carried out by the radioactive gas activity standard device and the calculated result is 0.81%. A test of calibration function of a portable tritium measurement instrument was carried out with the reference tritium gas. The results show that the calibration device can meet the needs of in-situ calibration of portable tritium measurement instruments.