Effect of axial reflector on radial uniformity in neutron transmutation doping of silicon

详细信息    查看全文

• 作者：Haksung Kim^a ;   ; ^{hskim@post3.rri.kyoto-u.ac.jp} ; Cheol Ho Pyeon^b ; Yoshinori Sakurai^c ; Tsuyoshi Misawa^b
• 关键词：Neutron transmutation doping ; Radial uniformity ; Axial variation ; Neutron screen ; Axial uniformity ; Axial reflector
• 刊名：Annals of Nuclear Energy
• 出版年：2011
• 出版时间：November 2011
• 年：2011
• 卷：38
• 期：11
• 页码：2541-2549
• 全文大小：1247 K

文摘

Significant axial variation of radial uniformity is observed in Si-ingot neutron transmutation doping in the flux screening method, and leads to non-uniform resistivity distribution for a certain part of Si-ingot. This axial variation of radial uniformity is caused by the installation of a partial neutron screen which decreases the reaction rates differently in the center and surface at the region not surrounded by the partial neutron screen. For the improvement of the specific distribution of radial uniformity in the axial direction, a new concept of axial reflector is introduced to partly change the reaction rate at a certain region of Si-ingot, and neutron irradiation experiments are carried out at the heavy water neutron irradiation facility in the Kyoto University Research Reactor. Based on the experimental and numerical results, the new axial reflector is proved to be effective for improving the axial variation of radial uniformity.