Tritium depth profiles in 2D and 4D CFC tiles from JET and TFTR

Carbon fibre composite (CFC) is currently the candidate material for the vertical target tiles in the International Thermonuclear Experimental Reactor (ITER) divertor because of its superior thermomechanical properties. However, its affinity for hydrogen isotopes and their co-deposition with eroded...

Full description

Saved in:
Bibliographic Details
Published in:Journal of nuclear materials 2003-03, Vol.313 (Complete), p.501-506
Main Authors: Bekris, N., Skinner, C.H., Berndt, U., Gentile, C.A., Glugla, M., Schweigel, B.
Format: Article
Language:English
Subjects:
2D/4D
CFC
Detritiation
JET
TFTR
Tritium profiles
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Carbon fibre composite (CFC) is currently the candidate material for the vertical target tiles in the International Thermonuclear Experimental Reactor (ITER) divertor because of its superior thermomechanical properties. However, its affinity for hydrogen isotopes and their co-deposition with eroded carbon may severely limit ITER plasma operations. Recently tritium depth profiles in divertor tiles retrieved from the Joint European Torus have been obtained by the coring/full combustion technique. The results revealed that a surprisingly large fraction (up to 61%) of the retained tritium had diffused deep into the bulk of the tile, most probably between the woven sheets of the CFC. Additionally, the coring/full combustion technique has shown that only the surface tritium (few ten μm) is efficiently released by air baking while the bulk tritium is almost not affected. Baking the tile under air even at 500 °C does not detritiate the bulk.
ISSN:0022-3115
1873-4820
DOI:10.1016/S0022-3115(02)01576-3