首页> 外文会议>12th EMAS regional workshop on electron probe microanalysis of materials today : Practical aspects >DISTRIBUTION OF SELENIUM IN GLASSES DESIGNED FOR THE CONDITIONING OF NUCLEAR WASTE
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DISTRIBUTION OF SELENIUM IN GLASSES DESIGNED FOR THE CONDITIONING OF NUCLEAR WASTE

机译:设计用于处理核废料的玻璃中硒的分布

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摘要

Selenium-79 has a half-life of 295,000 years and belongs to fission products that are currently vitrified in alumino-borosilicate glasses of high chemical durability. Due to its long radioactive period, the knowledge of mechanisms of its incorporation in such matrices is essential. Scanning electronic microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) are among the few techniques that allow selenium distributions to be analysed at contents as low as a few tenths of weight percent. In this study, several synthesis conditions (carried out for simplified nuclear glass compositions at 1,100 ℃) were examined in order to assess the influence of several parameters. Microstructures were characterised on a Philips XL30 W-TMP SEM equipped with a PRISM2000 PGT Si(Li) EDS detector.
机译:硒79的半衰期为295,000年,属于裂变产物,目前已在高化学耐久性的铝硼硅酸盐玻璃中玻璃化。由于其放射性周期长,因此必须了解将其掺入此类基质的机制。扫描电子显微镜(SEM)和能量色散X射线能谱(EDS)是少数几种可以分析硒分布的技术,其含量低至十分之几。在这项研究中,为了评估几个参数的影响,研究了几种合成条件(对简化的核玻璃成分在1100℃下进行)。在配有PRISM2000 PGT Si(Li)EDS检测器的Philips XL30 W-TMP SEM上对微结构进行了表征。

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  • 来源
  • 会议地点 bagnols-sur-ceze(FR)
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    CEA, DEN, DTCD, SECM, Laboratoire d'etude et de Developpement de Matrices de Conditionnement - Centre de Marcoule, FR-30207 Bagnols sur Ceze, France;

    CEA, DEN, DTCD, SECM, Laboratoire d'etude et de Developpement de Matrices de Conditionnement - Centre de Marcoule, FR-30207 Bagnols sur Ceze, France;

    CEA, DEN, DTCD, SECM, Laboratoire d'etude et de Developpement de Matrices de Conditionnement - Centre de Marcoule, FR-30207 Bagnols sur Ceze, France;

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