1.National Institute of Metrology, Beijing, 100013 China
2.Department of Physics, Beijing, 100084 China
3.Institute of Nuclear and New Energy Technology, 100084 China
Abstract：In order to improve the benefits of nuclear power plants and make full use of the nuclear fuels, it is necessary to perform the on-line nondestructive burnup measurement to the fuel pebbles from the high temperature gas-cooling reactor.Numerical calculations are carried out to simulate the absorptions of positioner materials on γ-rays.By analyzing the calculated results, it reveals that design parameters of the perforation can bring a larger variation to the intensity of radiations emitting from the positioned and further affect the on-line burnup measurement; Moreover, the intensity of radiations is not sensitive to the deviation between the positioner and perforation in the vertical direction.
［1］Terremoto L A A, Zeituni C A,et al.Gamma-ray spectroscopy on irradiated MTR fuel elements［J］.Nucl Instr and Meth, 2000,A450:495-514.
［2］李桃生.高温气冷堆在线燃耗测量系统研究与初步设计［D］.北京:清华大学,2006.
［3］张立国,李桃生,等.球床式高温气冷堆在线燃耗测量中239Pu的影响分析［J］.核动力工程,2008,29(4),88-92.
［4］张立国,尚仁成,等.冷却衰变时间对球床模块式高温气冷堆在线燃耗测量的影响分析［J］.核动力工程,2009,30(3):43-46.
2011, Vol. 32 
