通过反射光谱学和化学测量,在酸晶体中进行Pu的遥感
Luke R Sadergaski1, Jeffrey D Einkauf1, Laetitia H Delmau1
1Oak Ridge National Laboratory Oak Ridge Tennessee USA sadergaskilr@ornl.gov.
RSC advances
|December 11, 2025
概括
这项研究开发了一种使用反射光谱学的非侵入性方法,用于在晶体中量化. 这种技术有助于核材料问责制和核不扩散监测.
科学领域:
- 核化学 核化学 核化学
- 频谱学是一种光谱学.
- 材料科学 材料科学 材料科学
背景情况:
- 在固体矩阵中精确量化 (Pu) 和海王星 (Np) 等活性化物对于核材料管理至关重要.
- 酸六 (UNH) 是核燃料循环中活性化物的常见矩阵.
- 现有的固态活性化物量化方法可能具有侵入性或缺乏精度.
研究的目的:
- 开发一种非侵入性方法,以远程量化 (((VI) 与在UNH晶体中的联合结晶.
- 在UNH矩阵中研究Pu (VI),Pu (IV) 和Np (VI) 的光谱特征.
- 为了评估这些活性化物在晶体结构中的稳定性和光谱相互作用.
主要方法:
- 在手套箱内利用反射光谱仪进行光谱采集.
- 采用化学测量建模,包括主要成分分析 (PCA) 和部分最小方程 (PLS) 回归.
- 开发了基于光谱数据的Pu (VI) 定量化的监督PLS回归模型.
主要成果:
- 在UNH晶体中实现了Pu (VI) (0-5mol%) 的远程定量,其平方平均误差接近10%,定量界限接近0.2mol%.
- 对Pu (IV),Pu (VI) 和Np (VI) 的观察到的光谱特征与它们的溶液相类型相一致.
- 在至少一周的时间内在UNH矩阵中证明了Pu (VI) 的稳定性,并指出Pu (VI) 和Np (VI) 灭了U (VI) 的光,与Pu (IV) 不一样.
结论:
- 在UNH中建立了一个强大的,非侵入性的光谱方法,用于固态Pu (VI) 的量化.
- 该方法对改善物质问责制和核不扩散监测有直接影响.
- 光谱分析提供了对晶体矩阵内的活性化物的行为和相互作用的见解.
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