Ce and U speciation in wasteforms for thermal treatment of plutonium bearing wastes, probed by L 3 edge XANES
Ce and U speciation in wasteforms for thermal treatment of plutonium bearing wastes, probed by L 3 edge XANES
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通过 L 3 边缘 XANES 探测含钚废物热处理废物中 Ce 和 U 的形态
DOI：
10.1088/1757-899x/818/1/012019
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Bailey D
中科院分区：
文献类型：
--
作者：
Bailey D
应用X射线吸收光谱法来了解与放射性钚废物的固定和处置有关的元素的形态，利用Ce作为钚的替代物。Ce L 3 XANES（X射线吸收近边结构）表征的结晶玻璃材料生产的冷坩埚等离子体玻璃化，在示范规模，证明纳入作为Ce 3+内的玻璃相，提供了一个重要的验证实验室规模的研究。在氧化、中性和还原条件下合成的褐帘石陶瓷U0.9Ce0.1Ti2O6的XANES研究建立了通过形成U 5+和/或U6+引入Ce 3+的电荷补偿机理。在这些实施例中的每一个中，X射线吸收光谱法提供了一个关键的了解有关的机制纳入主机废物打算地质处置的元素形态。
X-ray absorption spectroscopy was applied to understand the speciation of elements relevant to the immobilisation and disposal of radioactive plutonium bearing wastes, utilizing Ce as a Pu surrogate. Ce L 3 XANES (X-ray Absorption Near Edge Structure) characterisation of a crystallised glass material produced by cold crucible plasma vitrification, at demonstration scale, evidenced incorporation as Ce 3+ within the glass phase, providing an important validation of laboratory scale studies. U and Ce L 3 XANES investigation of brannerite ceramics, U 0.9 Ce 0.1 Ti 2 O 6, synthesized under oxidizing, neutral and reducing conditions, established the charge compensation mechanism as incorporation of Ce 3+ through formation of U 5+ and/or U 6+ In each of these examples, X-ray Absorption Spectroscopy has provided a pivotal understanding of element speciation in relation to the mechanism of incorporation within the host wasteform intended for geological disposal.