Comparison of the structure of the plasma-facing surface and tritium accumulation in beryllium tiles from JET ILW campaigns 2011-2012 and 2013-2014
In this study, beryllium tiles from Joint European Torus (JET) vacuum vessel wall were analysed and compared regarding their position in the vacuum vessel and differences in the exploitation conditions during two cam paigns of ITER-Like-Wall (LW) in 2011201211 WI) and 20132014 ILW 2) Tritium content...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/98601 |
| Acceso en línea: | https://hdl.handle.net/11441/98601 https://doi.org/10.1016/j.nme.2019.02.011 |
| Access Level: | acceso abierto |
| Palabra clave: | Tritium Beryllium ITER-like wall Joint European Torus Fuel retention |
| Sumario: | In this study, beryllium tiles from Joint European Torus (JET) vacuum vessel wall were analysed and compared regarding their position in the vacuum vessel and differences in the exploitation conditions during two cam paigns of ITER-Like-Wall (LW) in 2011201211 WI) and 20132014 ILW 2) Tritium content in beryllium samples were assessed. Two methods were used to measure tritium content in the samples - dissolution under controlled conditions and tritium thermal desorption. Prior to desorption and dissolution experiments, scanning electron microscopy and energy dispersive x-ray spectroscopy were used to study structure and chemical composition of plasma.facing surface of the beryllium samples. Experimental results revealed that tritium content in the samples is in range of 2101 210 tritium atoms per square centimetre of the surface area with its highest content in the samples from the outer wall of the vacuum vessel (up to 1.910 atoms/cm in II.W1 campaign and 2410" atoms/cm in 11W2). The lowest content of tritium was found in the upper part of the vacuum vessel 2010 atoms/cm² and 2.010 atoms/cm in ILWI and IIW2, respectively). Results obtained from scanning electron microscopy has shown that surface morphology is different within single tile, however if to compare two campaigns main tendencies remains similar |
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