原子能科学技术2017，Vol.51Issue(7)：1290-1295,6.DOI:10.7538/yzk.2016.youxian.0623
用于在线测量反应堆内热中子相对通量密度分布的闪烁体光纤探测器研究
Study on Scintillator Fiber Detector for Online Measurement of Thermal Neutron Relative Flux Density Distribution in Reactor
摘要
Abstract
The scintillator fiber detector used two probes to identify the neutron signal.The detector system was tested by 252Cf fission source and was compared with the 3He counter.Meanwhile,the detector was used in Venus 1# assembly to measure the thermal neutron relative flux density distribution.The relative efficiency of the detector was calibrated with the neutron conversion rate from Geant4 code and neutron spectrum from MCNPX code.The results were compared with the fission rate measured by solid-state nuclear track detector.The measurement results show that the response of the scintillator fiber detector to the 252Cf neutron source agrees well with the attenuation of the point source,which is in good agreement with the counting rate of 3He counter.The relative distribution of the thermal neutron relative flux density measured at the Venus 1# thermal zone is consistent with fission rate distribution by the solid-state nuclear track detector.The same result of fast region is in line with the counting rate distribution measured by 3He counter and simulated by MCNPX code.The results provide important experimental data for the development of the detector.关键词
闪烁体光纤探测器/中子通量密度/在线测量/Geant4/MCNPXKey words
scintillator fiber detector/neutron flux density/online measurement/Geant4/MCNPX分类
能源科技引用本文复制引用
李严严,张雪荧,张艳斌,刘锋,马飞,万波,葛红林,张宏斌,陈亮..用于在线测量反应堆内热中子相对通量密度分布的闪烁体光纤探测器研究[J].原子能科学技术,2017,51(7):1290-1295,6.基金项目
中国科学院战略性先导科技专项资助项目(XDA03030300) （XDA03030300）
国家自然科学基金重大研究计划集成项目资助(91426301) （91426301）
