First wall surface problems for a D ↽ T tokamak reactor |
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Authors: | GL Kulcinski GA Emmert |
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Affiliation: | Department of Nuclear Engineering, University of Wisconsin, Madison, USA |
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Abstract: | The effects of deuterium, tritium, helium and neutron bombardment on surface degradation of the first wall of a 5000 MWth D-T reactor have been analyzed. The effects of both sputtering and blistering have been analyzed and the results applied to 316 stainless steel wall operating at temperatures from 300 to 500°C. It has been calculated that the total wall erosion rate is 0.22 mm/year and that 14 MeV neutron sputtering accounts for two thirds of this number. Sputtering from all neutrons results in erosion. The calculated erosion rate is 2–3 times that which would be allowable for a 30 year first wall lifetime. |
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