Flattening of burnup reactivity in long-life prismatic HTGR by particle type burnable poisons

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• 作者：Toru Obara ; ^{tobara@nr.titech.ac.jp} ; Taiki Onoe
• 关键词：Prismatic HTGR ; Burnable poison ; Excess reactivity ; Long life ; Passive safety
• 刊名：Annals of Nuclear Energy
• 出版年：2013
• 出版时间：July, 2013
• 年：2013
• 卷：57
• 期：Complete
• 页码：216-220
• 全文大小：608 K

文摘

For the flattening of burnup reactivity in long-life prismatic High-Temperature Gas-cooled Reactors (HTGRs), the effect of particle type on burnable poison properties is analyzed in detail using Monte Carlo calculations. Some examples of optimized specifications are shown. It is shown that combinations of particles with different materials, diameters, and concentrations make it possible to reduce excess reactivity to around or below 1 $ during the core life. The use of optimized burnable poison particles will help improve the passive safety features of long-life prismatic HTGR.