Abstract
The effect of simultaneous irradiation with fission and Westcott neutron fluxes of 3 × 10 13 and 8 × 10 13 n/cm 2·sec on the oxidation of a 20/25/Nb stainless steel by carbon dioxide has been studied at temperatures within the range 580–840 °C. The duration of irradiation was 10 293 h, although the time at temperature and hence that for oxidation was in most cases less than this, the minimum being 5002 h. Direct comparison of the in-reactor results with out-of-reactor control data indicated that at all temperatures the irradiation had not affected the magnitude of attack or the percentage of non-adherent oxide to within a factor of 2, the limit of reproducibility. The distributions between the metal and oxide of the isotopes 60Co, 182Ta and 54Mn, produced by the irradiation, were also determined and were compared with data for unirradiated specimens.
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