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首页> 外文期刊>Annals of nuclear energy >Minor Actinides transmutation in candidate accident tolerant fuel-claddings U_3Si_2-FeCrAl and U_3Si_2-SiC
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Minor Actinides transmutation in candidate accident tolerant fuel-claddings U_3Si_2-FeCrAl and U_3Si_2-SiC

机译：候选耐候性燃料包层U_3Si_2-FeCrAl和U_3Si_2-SiC中次Act系元素的mut变

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摘要

An advanced transmutation method is suggested that the long-lived Minor Actinides (MAs) in the spent fuel can be efficiently transmuted in the candidate Accident Tolerant Fuel (ATF). The transmutation of MAs is investigated through the Monte Carlo simulations in two potential fuel-claddings of ATF, U3Si2-FeCrAl and U3Si2-SiC. The critical loadings of MAs are determined through the Linear Reactivity Model (LRM) in order to keep the same reactivity as the current UO2-zircaloy system at the End of Cycle (EOC). In all cases, excellent transmutation efficiencies are found for the most important three MAs, Np-237, Am-241, and Am-243, of which the total transmutation rates are around 60%, 90%, and 60%, respectively. If only the longest-lived isotope Np-237 is considered, one U3Si2-SiC assembly can transmute Np-237 from six normal assemblies. The loading of MM has little influences on the neutronic properties, such as the power distributions inside an assembly and inside a fuel rod. The transmutation of MAs in the ATF assembly is shown to be more efficient and safe comparing with the normal assembly, while other important properties are kept, such as the cycle length and the power distribution. (C) 2018 Elsevier Ltd. All rights reserved.
机译：提出了一种先进的trans变方法，可以将候选燃料中的长寿命次Act系元素（MAs）有效地转化为候选耐事故燃料（ATF）。 MAs的mut变是通过蒙特卡罗模拟在两个潜在的ATF燃料包壳U3Si2-FeCrAl和U3Si2-SiC中研究的。通过线性反应模型（LRM）确定MA的临界载荷，以便在循环结束时（EOC）保持与当前UO2-锆合金体系相同的反应性。在所有情况下，最重要的三个MA Np-237，Am-241和Am-243均具有出色的转化效率，其总转化率分别约为60％，90％和60％。如果仅考虑寿命最长的同位素Np-237，则一个U3Si2-SiC组件可以将Np-237从六个普通组件中转化出来。 MM的载荷对中子性能（如组件内部和燃料棒内部的功率分配）影响很小。与常规组件相比，ATF组件中的MA转换显示出更加有效和安全，同时保留了其他重要属性，例如周期长度和功率分配。 （C）2018 Elsevier Ltd.保留所有权利。

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  • 来源
    《Annals of nuclear energy》 |2019年第5期|204-214|共11页
  • 作者

    Chen Shengli; Yuan Cenxi;

  • 作者单位

    Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Guangdong, Peoples R China|CEA, Cadarache, DEN DER SPRC LEPh, F-13108 St Paul Les Durance, France;

    Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Guangdong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Minor Actinide; Transmutation; Accident tolerant fuel; U3Si2; FeCrAl; SiC;

    机译：次Act系元素;变;耐事故燃料;U3Si2;FeCrAl;SiC;

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