同位素2018，Vol.31Issue(2)：77-83,7.DOI:10.7538/tws.2017.youxian.051
以三氯化硼为介质离心分离硼同位素
Centrifugal Separation of Boron Isotopes Using Boron Trichloride as Processing Gas
摘要
Abstract
Stable isotopes had been widely used in the industrial production,health care,fundamental physics research,and so on.Natural boron has two stable isotopes:10B (19.9％) and 11B(80.1％).The thermal neutron cross section of 10B isotope is 3 835 barns,while that of 11B isotope is only 0.005 5 barns.With high cross section for thermal neutron,10B isotope gains important applications in nuclear industry,radiation therapy and other fields.In the third-generation nuclear power plants,it's required that the primary coolant should use enriched boric acid with 10B isotope in abundance of 30 ％-60％.Boron carbide with 10B isotope in abundance of 92％ is used in fast neutron reactors as the control rod.10B isotope can also be used for boron neutron capture therapy (BNCT) in cancer treatments.In order to obtain high-abundance 10B isotope,the study on gas centrifugal separation of boron isotopes was carried out based on domestic centrifuges,with boron trichloride as processing gas.Single-centrifuge experiments of different feed flows and cuts were done.Samples of each experiment were analyzed by the gas mass spectrometer to calculate separation performance.As a result,the overall separation factor of boron trichloride was about 1.08.Furthermore,the influence of feed flow and cut on overall separation factor was studied.Finally,based on the single-centrifuge experiments,parameters of centrifugal cascades for high-abundance 10B isotope production were carried out by numerical calculation.Cascade parameters of square cascade and matched abundance ratio cascade were worked out separately.10B isotope production in abundance of 60％ and 90％ could be obtained by cascades with suitable parameters.The single-centrifuge experimental study and cascade calculation proved the feasibility of boron isotope separation by gas centrifugation method,with boron trichloride as processing gas.It laid a foundation for enriched boron isotopes production.关键词
硼同位素/稳定同位素分离/气体离心法/三氯化硼/基本全分离系数Key words
boron isotopes/stable isotope separation/gas centrifugal separation/boron trichloride/overall separation factor分类
能源科技引用本文复制引用
潘建雄,周明胜,裴根,姜东君,洪锋..以三氯化硼为介质离心分离硼同位素[J].同位素,2018,31(2):77-83,7.基金项目
国家自然科学基金项目(11475095) （11475095）
