Synthesis of carbon-13 labelled carbonaceous deposits and their evaluation for potential use as surrogates to better understand the behaviour of the carbon-14-containing deposit present in irradiated PGA graphite
Synthesis of carbon-13 labelled carbonaceous deposits and their evaluation for potential use as surrogates to better understand the behaviour of the carbon-14-containing deposit present in irradiated PGA graphite
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DOI：
10.1016/j.jnucmat.2015.12.021
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发表时间：
2016-03-01
影响因子：
3.1
通讯作者：
Williams, S. J.
中科院分区：
文献类型：
--
作者：
Payne, L.;Walker, S.;Williams, S. J.
本工作已使用微波等离子体化学气相沉积产生合适的同位素标记的碳质沉积物的表面上的桩级A石墨作为替代品用于研究从英国Magnox反应堆中提取的辐照石墨上观察到的存款的行为。这些沉积物已在其他地方显示出与块状石墨相比含有增加的C-14浓度。结合拉曼光谱，离子束研磨与扫描电子显微镜和二次离子质谱法被用来确定地形和内部形态形成的存款。直接比较发现的存款辐照石墨样品从Magnox反应堆堆芯钻孔，并表现出良好的相似性的外观。这项工作表明，微波等离子体化学气相沉积技术在生产模拟碳沉积物方面具有价值，具有足够的代表性形态，可用于非放射性替代研究，研究一些辐照Magnox反应堆石墨上含C-14沉积物的处置后行为。(C)2015作者由Elsevier B. V.发布，这是CC BY许可下的开放获取文章。
The present work has used microwave plasma chemical vapour deposition to generate suitable isotopically labelled carbonaceous deposits on the surface of Pile Grade A graphite for use as surrogates for studying the behaviour of the deposits observed on irradiated graphite extracted from UK Magnox reactors. These deposits have been shown elsewhere to contain an enhanced concentration of C-14 compared to the bulk graphite. A combination of Raman spectroscopy, ion beam milling with scanning electron microscopy and secondary ion mass spectrometry were used to determine topography and internal morphology in the formed deposits. Direct comparison was made against deposits found on irradiated graphite samples trepanned from a Magnox reactor core and showed a good similarity in appearance. This work suggests that the microwave plasma chemical vapour deposition technique is of value in producing simulant carbon deposits, being of sufficiently representative morphology for use in non-radioactive surrogate studies of post-disposal behaviour of C-14-containing deposits on some irradiated Magnox reactor graphite. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.