CALCULATION OF DISPLACEMENT, GAS, AND TRANSMUTATION PRODUCTION IN STAINLESS-STEEL IRRADIATED WITH SPALLATION NEUTRONS

[摘要] Calculations using the high-energy transport code LAHET have been made for the production of displacements, helium gas, and transmuted atoms for stainless steel (Fe-18 wt% Cr-10 wt% Ni) irradiated with spallation neutrons at energies of 100 to 1600 MeV. The damage energy cross section increased from about 250 to 350 b keV for increasing neutron energies from 100 to 1600 MeV with a spallation spectrum average of 281 b keV. For a displacement threshold energy of 33 eV, the corresponding spectrum-average displacement cross section is 3400 b. The PKA spectrum was found to be fairly independent of the incident neutron energy, with an average damage energy of 0.25-0.30 MeV. The helium production cross section increased monotonically with increasing neutron energy, with a spectrum average of 0.32 b. The maximum transmutation yield was observed near manganese (Z = 25), corresponding to a production cross section of about 0.2 b. Relevance to fusion materials is discussed.

[发布日期] 1994-09-01

[效力级别]  Proceedings Paper