The Russian fuel assembly TVS-2M is a newly proposed fuel configuration that contains gadolinium-oxide at different concentrations mixed with enriched UO at different U-235 enrichment values. The purpose of this study is to investigate the neutronic behavior of the Bushehr VVER-1000 reactor core by replacing the current standard Fuel Assemblies (FAs) called TVS with the new generation of TVS-2M FAs. In such manner, the reactor core was simulated under both modes of TVS-2M and TVS FAs arrangement using the WIMS, CITATION, MCNPX, and SuperMC codes in equal terms. Neutronic parameters of the reactor core such as effective multiplication factor, excess reactivity, neutron flux distribution, power peaking factor, and control rod worth are calculated and discussed within a comparative framework of both configurations of FAs; TVS and TVS-2M.

中文翻译：

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VVER-1000 型反应堆中新一代 TVS-2M 燃料组件的中子分析


俄罗斯燃料组件TVS-2M是一种新提出的燃料配置，其中含有不同浓度的氧化钆与不同U-235浓缩值的浓缩UO混合。本研究的目的是通过用新一代 TVS-2M FA 取代当前称为 TVS 的标准燃料组件 (FA)，来研究 Bushehr VVER-1000 反应堆堆芯的中子行为。以这种方式，使用WIMS、CITATION、MCNPX和SuperMC代码对TVS-2M和TVS FA布置两种模式下的反应堆堆芯进行同等仿真。在两种 FA 配置的比较框架内计算和讨论了反应堆堆芯的中子参数，如有效倍增因子、过剩反应性、中子通量分布、功率峰值因子和控制棒价值； TVS 和 TVS-2M。