Uranium dioxide pellets seeded in Type 316 stainless steel containers with a helium gas were irradiated in helium and in COn in thermal fluxes of the order of 1 x 10 13 n/cm2) (sec). Cladding-surface temperatures were reportedly between 1200 and about 1800 F. The irradiation was performed at BNL by the Ford instrument Company.nThe hot-cell examination performed by BMl showed that there were no obvious effects of the irradiation on the specimen tested in helium. However, the specimen irradiated in the presence of COy exhibited severe cladding-CO2 reaction and possible central melting of the UO2.
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