Hot Isostatic Pressing (HIP): A novel method to prepare Cr-doped UO2 nuclear fuel
Hot Isostatic Pressing (HIP): A novel method to prepare Cr-doped UO2 nuclear fuel
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DOI：
10.1557/adv.2020.62
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发表时间：
2020-01-01
期刊：
影响因子：
0.8
通讯作者：
Corkhill, Claire L.
中科院分区：
文献类型：
--
作者：
Cordara, Theo;Smith, Hannah;Corkhill, Claire L.
向现代UO 2燃料中添加Cr2 O3改变了微结构，从而通过在裂变期间产生更大的颗粒，可以容纳更高比例的裂变气体。这减少了燃料棒的芯块-包壳机械相互作用，使燃料比传统的二氧化铀燃料“燃烧”更长时间，从而最大限度地提高了所获得的能量。在这里，我们描述了使用热等静压（HIP）的UO 2和铬掺杂UO 2的制备，作为一种潜在的燃料制造方法，并为乏核燃料研究开发类似材料。合成材料的表征证实，成功形成了高密度UO 2，并且Cr以颗粒形式存在于晶界和UO 2基质中，由于加工条件，可能以还原形式存在。与其他方法合成的掺铬二氧化铀的研究相反，在铬的存在下，观察到晶粒尺寸没有显着变化。
The addition of Cr2O3 to modern UO2 fuel modifies the microstructure so that, through the generation of larger grains during fission, a higher proportion of fission gases can be accommodated. This reduces the pellet-cladding mechanical interaction of the fuel rods, allowing the fuels to be "burned" for longer than traditional UO2 fuel, thus maximising the energy obtained. We here describe the preparation of UO2 and Cr-doped UO2 using Hot Isostatic Pressing (HIP), as a potential method for fuel fabrication, and for development of analogue materials for spent nuclear fuel research. Characterization of the synthesised materials confirmed that high density UO2 was successfully formed, and that Cr was present as particles at grain boundaries and also within the UO2 matrix, possibly in a reduced form due to the processing conditions. In contrast to studies of Cr-doped UO2 synthesised by other methods, no significant changes to the grain size were observed in the presence of Cr.