HTR-10燃料球和石墨球反应性当量测量实验

Fuel Balls and Graphite Balls Reactivity Worth Calibrating Experiment for HTR-10

10MW高温气冷实验堆(HTR-10)是球床型反应堆,燃料元件的装卸和循环可不停堆,为了保证其安全运行,必须准确地知道燃料元件的装卸和循环过程可能引起的反应性变化,尤其是向堆芯装料时引入的反应性变化。HTR-10首次临界后对燃料球和石墨球的反应性价值进行了测量。本文介绍了燃料球和石墨球反应性当量刻度的方法,给出了初始装载堆芯和空气气氛下的燃料球和石墨球反应性当量实验测量结果。

10MW High temperature gas-cooled reactor(HTR-10)is a pebble-bed gas-cooled reac-tor.It is not necessary to shutdown the reactor when loading or unloading fuel.To ensure the safety of operating the reactor,the reactivity change causing by loading or unloading fuel and the process of fuel circulating must be precisely known.The reactivity worth of fuel balls and graphite balls is cali-brated after the first critical of HTR-10.This paper gives the calibration method of the reactivity worth of fuel balls and graphite balls,and gives the counting results and experiment results of the re-activity worth of fuel balls and graphite balls in first fuel loading reactor core and air atmosphere.