Abstract: 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.

Key words: calorimeterneutron source. temperature distribution. ~(210)Po.

摘要： <正> ~(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。表1是用同一台量热计在投料和做成源条件下的测量

关键词: 量热计, 中子源, 温度分布, ~(210)Po