核化学与放射化学2017，Vol.39Issue(5)：373-376,4.DOI:10.7538/hhx.2017.YX.2016062
可燃毒物铒的辐照及其同位素热电离质谱法测定
Irradiation of Burnable Poison-Erbium and Its Isotopic Determination by TIMS
梁帮宏 1陈云明 1刘志 1孙鹏 1李兵 1杨彬1
作者信息
- 1. 中国核动力研究设计院第一研究所,四川成都 610005
- 折叠
摘要
Abstract
Erbium(Er) is a kind of long-term burnable poison which is suitable for lightwater reactor(LWR).The irradiation of Er2O3 is a basic means to study the performance of burnable absorber Er in the reactor.Er2O3 samples were irradiated in the irradiation channel (neutron fluence rate is about 2 × 1014/(cm2 · s)) of high flux engineering test reactor (HFETR) for 91.3 h.The Er isotopic abundances of irradiated samples were measured by thermal ionization mass spectrometry(TIMS).The peak jumping mode was applied to determine the 6 isotopes of Er,and the low abundance 162Er was detected by the Faraday cup.Isobaric interferences can be reduced by accurate control of heating current.Experiment shows that the isobaric interferences of 168Yb,170Yb were reduced when the evaporation filament current was below 1 400 mA and ionization filament current was below 5 500 mA.The measurement results show that the 166Er,167Er and 168Er isotopic abundance changes greatly after neutron irradiation,and the variation of abundance is closely related to the neutron absorption cross section.关键词
可燃毒物/铒同位素/中子辐照/热电离质谱Key words
burnable poison/erbium isotopes/neutron irradiation/thermal ionization mass spectrometry(TIMS)分类
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梁帮宏,陈云明,刘志,孙鹏,李兵,杨彬..可燃毒物铒的辐照及其同位素热电离质谱法测定[J].核化学与放射化学,2017,39(5):373-376,4.
