量热法测量贮氚容器中的氚

Measurement of Tritium in the Tritium Storied Vessel With Calorimetry

设计建造了 1台样品池容积为1 95mm× 42 0mm的大型氚量热计。该量热计测量样品热功率下限为 6mW。样品热功率在 1 60～ 3 5 0 0mW范围内时 ,信号输出与样品热功率的线性相关系数大于0 9999。当样品热功率不低于 1 60mW时 ,精密度好于 0 2 %。它适用于非对称置样方式的样品中氚的测量。对大容积铀化学床中氚的实测结果表明 :该量热计具有较好的准确性。

A large-scale tritium calorimeter with a specimen cell (195 mm×420 mm) was designed and made. The lower measuring limit of specimen thermal power is 6 mW by this calorimeter. The correlation coefficient between thermopile signal output and specimen thermal power is greater than 0.999 9 when specimen thermal power is in the range of 160～3 500 mW. The measuring accuracy of the calorimeter is better than 0.2% when specimen thermal power is not less than 160 mW. Tritium can be measured when specimen is set asymmetrically in specimen cell. Tritium in large capacity uranium chemical bed was measured using the calorimeter and the result shows that the good precision can be expected.