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首页> 外文期刊>Nuclear Engineering and Design >Neutronic and thermal-hydraulic fuel design for a dual-salt breed-and-burn molten salt reactor
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Neutronic and thermal-hydraulic fuel design for a dual-salt breed-and-burn molten salt reactor

机译：用于双盐品种和燃烧熔融盐反应器的中子和热液压燃料设计

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摘要

A breed-and-burn molten salt reactor (BBMSR) concept is proposed to achieve high uranium utilisation in a oncethrough fuel cycle. By using separate fuel and coolant molten salts, the BBMSR may overcome key materials limitations of traditional breed-and-burn (B&B) and molten salt reactor designs. A central challenge in design of the BBMSR fuel is balancing the neutronic requirements for B&B operation with thermal-hydraulic requirements for safe and economically competitive reactor operation. Fuel configurations that satisfy both neutronic and thermal-hydraulic objectives were identified for 5% enriched and 20% enriched uranium feed fuel. A neutron balance method and thermal-hydraulic design algorithm were used to evaluate uranium utilisation and maximum allowable power density, respectively, for a range of configurations. B&B operation is achievable in the 5% enriched version with orders of magnitude greater uranium utilisation compared to light water reactors, but with moderately lower power density. Using 20% enriched feed fuel relaxes neutronic constraints so a wider range of fuel configurations can be considered, but there is a strong inverse correlation between power density and uranium utilisation. The fuel design study indicates the flexibility of the BBMSR concept to operate along a spectrum of modes ranging from high fuel utilisation at moderate power density using 5% enriched uranium feed fuel, to high power density and moderate utilisation using 20% uranium enrichment.
机译：提出了一种品种和燃烧的熔融盐反应器（BBMSR）概念，以在造粒燃料循环中实现高铀使用。通过使用单独的燃料和冷却剂熔盐，BBMSR可以克服传统品种和燃烧（B＆B）和熔融盐反应器设计的关键材料限制。 BBMSR燃料设计中的中央挑战是平衡B＆B操作的中性要求，以热液压要求为安全和经济竞争反应堆操作。满足中子和热液压物镜的燃料配置被鉴定为5％富集和20％富含铀饲料燃料。中子平衡法和热液压设计算法用于评估铀使用和最大允许功率密度，用于一系列配置。在5％富集的版本中可实现B＆B操作，与轻质水反应器相比，铀利用率更大，但具有中度较低的功率密度。使用20％富集的饲料燃料放宽中子约束，因此可以考虑更广泛的燃料配置，但功率密度与铀利用率之间存在强烈的反比相关性。燃料设计研究表明BBMSR概念沿着使用5％富含铀饲料燃料的中等功率密度的高燃料利用率的频谱操作的灵活性，使用20％铀浓缩的高功率密度和中度利用。

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