Abstract
In manufacturing fuel rods, specifications about the gas-content of the sintered pellets and filling gas in the fuel rod have to be met. H 2, A, O 2, N 2, CH 4 and CO are determined in extraction gases of pellets, H 2 being the major component; He, H 2, A, O 2, N 2, CH 4 and CO are determined in the rod filling gas, He being the major component. The principles of gas chromatography are explained, applied to the rest-gas determination in sintered pellets and fuel rod filling gas and some experimental data are shown. Special attention is paid to both extraction techniques which had to be designed for glove box work. A minimum sample volume of 950 μ 1 is required for rest-gas analysis, and a minimum of 6,5 cm 3 is required for rod filling gas. The detection limit for each gas component is better than 0.06 v/o at min, sample volume. The accuracy for the major components is better than 0.5 v/o absolute and for the minor components better than 3% relative.
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