Comparison of the thermal stability of the codeposited carbon/hydrogen layer to that of the saturated implant layer in graphite
- Sandia Labs., Livermore, CA (USA)
- Sandia National Labs., Albuquerque, NM (USA)
This paper presents the results of an experimental study of the thermal stability in air and vacuum of the codeposited carbon/hydrogen layer formed in a carbon-lined fusion reactor. Results are also presented for the stability of the saturated layer formed by the implantation of energetic hydrogen ions into a graphite surface. For both films, the hydrogen isotope release occurs at a much lower temperature in air than it does in a vacuum. At temperatures above 600 K, the hydrogen isotope release in air is very rapid and is emitted in a condensible form. It is speculated that isotopic exchange with the water present in air is responsible for this release. In vacuum, temperatures in excess of 1000 K are required to produce a rapid release from either film. The implications of these results to the safety of tritium in carbon-lined fusion reactors are discussed. 24 refs., 2 figs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6896188
- Report Number(s):
- SAND-90-1394C; CONF-900505--4; ON: DE90012148
- Country of Publication:
- United States
- Language:
- English
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CARBON
ELEMENTAL MINERALS
ELEMENTS
GRAPHITE
HYDROGEN
ISOTOPIC EXCHANGE
LAYERS
MATERIALS
MINERALS
NONMETALS
STABILITY
THERMONUCLEAR REACTOR MATERIALS