Utilization of rock-like oxide fuel in the phase-out scenario
Utilization of rock-like oxide fuel in the phase-out scenario
复制标题
在逐步淘汰的情况下使用类岩石氧化物燃料
DOI：
10.1080/00223131.2014.846834
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发表时间：
2014
影响因子：
1.2
通讯作者：
T. Iwamura
中科院分区：
文献类型：
--
作者：
K. Nishihara;H. Akie;N. Shirasu;T. Iwamura
采用核物质平衡（NMB）分析方法，对福岛核事故后日本逐步淘汰钚燃料的轻水堆中类岩石氧化物（ROX）燃料的利用进行了研究。为了进行分析，开发了NMB代码，其特点是精确的燃耗计算，反应堆和燃料的灵活组合，以及估计废物和处置库的能力。分析了混合氧化物（MOX）燃料和ROX燃料中的钚直流燃烧的三个情景组。使用两个全MOX或全ROX反应堆，钚的量减少到大约一半，钚的同位素矢量恶化，可用作核武器，特别是在自发裂变中子产生方面。ROX反应堆的效果比MOX反应堆更显着，在减少钚的数量和恶化的同位素载体。由于混合氧化物和火箭氧化物乏燃料的热量和毒性相当高，混合氧化物和火箭氧化物反应堆并没有减少储存库的占地面积和潜在的放射性毒性。
Utilization of rock-like oxide (ROX) fuel in light water reactors for plutonium (Pu) burning was studied by nuclear material balance (NMB) analysis for a case of Japanese phase-out scenario under investigation after the Fukushima accident. For the analysis, the NMB code was developed with features of accurate burn-up calculation, flexible combination of reactors and fuels, and an ability to estimate waste and repository. Three scenario groups of once-through Pu burning in mixed oxide (MOX) fuel and in ROX fuel were analyzed. Using two full-MOX or full-ROX reactors the Pu amount is reduced to about one-half and the isotopic vector of Pu deteriorated for being used as a nuclear weapon, especially in terms of spontaneous fission neutron generation. Effects of ROX reactors are more significant than MOX reactors in terms of both reduction in the Pu amount and deterioration of the isotopic vector. Repository footprint and potential radiotoxicity are not reduced by the MOX and ROX reactors because the heat and toxicity of MOX and ROX spent fuels are considerably high.