TY - JOUR
T1 - Tritium release behavior from the graphite tiles used at the dome unit of the W-shaped divertor region in JT-60U
AU - Katayama, K.
AU - Takeishi, T.
AU - Manabe, Y.
AU - Nagase, H.
AU - Nishikawa, M.
AU - Miya, N.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/4/1
Y1 - 2005/4/1
N2 - Release behavior of tritium from the graphite tiles used at dome top and inner dome wing in JT-60U was investigated by the thermal desorption method in dry argon, argon with oxygen and water vapor, or argon with hydrogen. It was found that approximately 20-40% of total tritium is left in graphite even after heating to the high temperature above 1000 °C in dry argon. The residual tritium could be removed by exposing the graphite tile to oxygen with water vapor or hydrogen at the high temperature above 1000 °C. The tritium retention of the dome top tile was quantified as 84-30 kBq/cm2. The inner dome wing tile had a steep tritium distribution from 8 to 0.1 kBq/cm 2. It is observed that a measurable amount of tritium existed in the deep site of the graphite tile.
AB - Release behavior of tritium from the graphite tiles used at dome top and inner dome wing in JT-60U was investigated by the thermal desorption method in dry argon, argon with oxygen and water vapor, or argon with hydrogen. It was found that approximately 20-40% of total tritium is left in graphite even after heating to the high temperature above 1000 °C in dry argon. The residual tritium could be removed by exposing the graphite tile to oxygen with water vapor or hydrogen at the high temperature above 1000 °C. The tritium retention of the dome top tile was quantified as 84-30 kBq/cm2. The inner dome wing tile had a steep tritium distribution from 8 to 0.1 kBq/cm 2. It is observed that a measurable amount of tritium existed in the deep site of the graphite tile.
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U2 - 10.1016/j.jnucmat.2004.11.005
DO - 10.1016/j.jnucmat.2004.11.005
M3 - Article
AN - SCOPUS:13944278832
VL - 340
SP - 83
EP - 92
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - 1
ER -