Abstract
Among the radioactive wastes generated from the nuclear power plant, a radioactive nuclide such as 129 I is classified as a difficult-to-measure (DTM) nuclide, owing to its low specific activity. Therefore, the establishment of an analytical procedure, including a chemical separation for 129 I as a representative DTM, becomes essential. In this report, the adsorption and recovery rate were measured by adding 125 I as a radio-isotopic tracer (t 1/2 = 60.14 d) to the simulation sample, in order to measure the activity concentration of 129 I in a pressurized-water reactor primary coolant. The optimum condition for the maximum recovery yield of iodine on the anion exchange resins (AG1 x2, 50-100 mesh, Cl − form) was found to be at pH 7. In this report, the effect of the boron content in a pressurized-water reactor primary coolant on the separation process of 129 I was examined, as was the effect of 3 H on the measurement of the activity of iodine. As a result, no influence of the boron content and of the simultaneous 3 H presence was found with activity concentrations of 3 H lower than 50 Bq/mL, and with a boron concentration of less than 2,000 μg/mL.
Published Version
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