大体积低能β量热装置研制  

Development of A Large Calorimeter for Measuring Low Energy Beta-activity

作　　者：贾伟江[1] 赵增侨[1] 李星垣[1] 张廷生[1] 刘红明[1] 

机构地区：[1]中国核动力研究设计院,成都610005

出　　处：《核动力工程》2003年第5期467-470,共4页Nuclear Power Engineering

摘　　要：为了实现大体积样品放射性活度的非破坏性测量,研制了大体积低能β量热装置。该装置采用工作于伺服控制方式的等温型量热计原理,测量腔体积约3200cm3,热功率测量范围30～2000mW。装置的实验验证表明:当热功率为300mW时,测量结果的扩展不确定度好于0.4%,平均测量时间小于3.5h。本文描述了装置的测量原理、系统组成、校准方法、性能测试及测量不确定度分析等。A large calorimeter is developed to measure nondestructively low-energy Beta-activity of large volume radioactive samples. The Isothermal calorimeter operating as servo-control mode has the capac-ity for measurement of 3200ml volume. It is designed to measure a thermal power ranging from 30mW to 2000mW. It has an expanded uncertainty of less than 0.4% relative for a single measurement and can com-plete a measurement within 3.5h. This paper discusses the measurement principle, structure, electrical cali-bration, performance test and uncertainty analysis of the calorimeter.

关 键 词：量热装置 放射性活度测量 热功率 温控系统 

分 类 号：TL8[核科学技术—核技术及应用]