External filtered neutron beams have been developed at the horizontal radial channels No. 4 of Dalat research reactor. In the material composition of the neutron filters, the primary material components of Iron, Alumi...External filtered neutron beams have been developed at the horizontal radial channels No. 4 of Dalat research reactor. In the material composition of the neutron filters, the primary material components of Iron, Aluminum, Nickel and Vanadium are used to obtain the mono-energetic neutron beams of 24 and 59 keV, with low level of Gamma and slow neutron background. A computer code and Monte-Carlo simulation technique were applied to optimize the filter configurations and to deduce the neutron energy distributions in the filtered beams. A hydrogen-filled proton recoil detector and the activation method with Gold foils were used to measure the neutron energy spectrum and flux of each beam at sample position. The results of experimental neutron fluxes are 6.1 × 105 and 5.3 × 105 n/cm2/s for 24 and 59 keV beams, respectively.展开更多
针对中国石油化工股份有限公司广州分公司的1.5 Mt/a S Zorb装置,考察了影响装置长周期平稳运行的因素。采取使用国产高通量滤芯及在转剂线上使用耐磨管件,对再生取热盘管进行改造,对闭锁料斗程控阀进行预防性维修等措施解决了装置长周...针对中国石油化工股份有限公司广州分公司的1.5 Mt/a S Zorb装置,考察了影响装置长周期平稳运行的因素。采取使用国产高通量滤芯及在转剂线上使用耐磨管件,对再生取热盘管进行改造,对闭锁料斗程控阀进行预防性维修等措施解决了装置长周期运行瓶颈,实现了在95.06%设计负荷工况下连续平稳运行超过49个月的目标,关键设备反应器过滤器运行超过4 a,期间压差未超过30 kPa。展开更多
文摘External filtered neutron beams have been developed at the horizontal radial channels No. 4 of Dalat research reactor. In the material composition of the neutron filters, the primary material components of Iron, Aluminum, Nickel and Vanadium are used to obtain the mono-energetic neutron beams of 24 and 59 keV, with low level of Gamma and slow neutron background. A computer code and Monte-Carlo simulation technique were applied to optimize the filter configurations and to deduce the neutron energy distributions in the filtered beams. A hydrogen-filled proton recoil detector and the activation method with Gold foils were used to measure the neutron energy spectrum and flux of each beam at sample position. The results of experimental neutron fluxes are 6.1 × 105 and 5.3 × 105 n/cm2/s for 24 and 59 keV beams, respectively.
