Analysis of Burnup Characteristics of Chloride Salt Fast Reactor under Pre-breeding Scheme
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摘要: 为分析和评估在快中子氯盐堆中采用低富集铀(LEU)、Pu以及超铀(TRU)启堆的Th-U循环方案,定义了再生比与置换比的概念,以对比Th-U循环反应链关键核素的转换信息,并采用TMCBurnup程序对3种不同的启堆燃料下的预增殖方案进行燃耗分析。分析结果表明:在预增殖循环方案下,采用3种燃料启堆均能快速完成233U的生产,其中TRU启堆过渡模式具有较大的置换比,LEU启堆过渡模式具有较大的233U再生比,且在整个运行周期中,堆芯始终有较大的负温度反馈系数。Abstract: In order to analyze and evaluate the Th-U cycle scheme of starting reactor with low enriched uranium (LEU), Pu and transuranium (TRU) in fast neutron chloride salt reactor, the concepts of regeneration ratio and replacement ratio are defined to compare the conversion information of key nuclides in the Th-U cycle reaction chain. The burnup analysis of pre-breeding scheme under three different start-up fuels is carried out by using TMCBurnup program. The analysis results show that the under the pre-breeding cycle scheme, the production of 233U can be quickly completed by using three fuels for start-up, in which the TRU start-up transition mode has a larger replacement ratio, the LEU start-up transition mode has a larger 233U regeneration ratio, and the core always has a large negative temperature feedback coefficient in the whole operation cycle.
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表 1 主要核素质量流 g
Table 1. Mass Flow of Primary Nuclides
启堆方式 Pu+Th TRU+Th LEU+Th 初始量 添加量 剩余量 初始量 添加量 剩余量 初始量 添加量 剩余量 232Th 4.12×107 1.67×108 4.06×107 4.07×107 3.66×108 3.53×107 1.18×107 2.73×107 1.12×107 232U 8.35×103 1.86×104 2.64×103 233U 3.37×106 3.66×106 9.68×105 235U 1.53×105 1.54×105 7.68×106 3.13×107 1.05×106 238U 1.19×102 1.04×102 3.11×107 1.24×108 3.1×107 237Np 2.75×104 5.87×105 4.19×106 4.11×105 2.36×105 238Pu 1.76×105 1.24×106 1.07×105 1.92×105 1.71×106 5.69×105 1.38×105 239Pu 5.14×106 3.13×107 1.25×106 4.30×106 2.97×107 2.28×106 2.90×106 240Pu 2.48×106 1.73×107 1.85×106 2.03×106 1.39×107 3.00×106 8.37×105 241Pu 3.57×105 2.48×106 2.10×105 1.02×106 6.92×106 5.35×105 7.71×104 242Pu 7.18×105 4.95×106 6.61×105 6.37×105 4.33×106 1.13×106 4.55×104 241Am 1.24×105 3.22×105 2.01×106 5.49×105 4.17×104 243Am 1.38×105 1.81×105 1.12×106 3.43×105 1.10×104 244Cm 6.60×104 7.67×104 5.17×105 2.01×105 6.03×103 -
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