用γ谱仪测定高温焚烧炉炉渣中的放射性核素

DETERMINATION OF RADIOACTIVE NUCLIDES IN GRANULES FROM HIGH TEMPERATURE INCI-NERATOR BY GAMMA RAY SPECTROMETER

摘要: <正> 一、引言高温焚烧炉是一种处理中低放固体废物的装置,它可将废物中的绝大部分放射性核素安全地包容于颗粒状的炉渣之中。这种炉渣的主要成份是氧化硅和氧化铁。对炉渣中放射性核素的测定可用常规的放化方法来实现,即破碎、溶解、分离及最后的放射性测量。显然,这是十分烦杂的,而非破坏性的直接测量无疑要简单得多。射线通过物质时由于吸收作用而衰减。虽然γ射线有较强的穿透能力,它毕竟要在某种程度上为物质所吸收。非破坏测量的

Abstract: In this work the absorption behaviour of the granules from a high temperature incinerator is investigated. 239Pu, 241Pu, 241Am and 137Cs in samples are measured and satisfactory results have been obtained. When the concentration of 239Pu is higher than 1 μg/g(sample) , the error of analysis is less than 15%.