^(210)Po量热测量结果偏差原因分析

ANALYSIS OF THE DEVIATION OF ^(210)Po CALORIMETRY MEASUREMINTS

^(210)Po是^(210)Po-Be中子源的原料。^(210)Po活度数据是计算中子产额的关键依据。我们在^(210)Po-Be中子源研制和生产过程中,是用量热计测量^(210)Po原料的放射性活度。但是,在秦山核电站启动中子源的中子产额测量中,发现中子源的^(210)Po投料量热测量数据与做成中子源后,其中^(210)Po量热测量数据有比较大的差异。

In the research of neutron yield of Starter Neutron Source for Qinshan Nuclear Power Station. it was found that the ^(210)Po activity calorimetry data in the neutron source was over 16 percent larger than the data measured by the same calorimeter for ^(210)po which had been used to make the neutron source. The deviation was analysed to be due to different temperature distributions.