Abstract
Experimental data on changes taking place in the properties of ion exchangers after prolonged use in the purification of low-activity waste water in an experimental industrial plant designed for the purification of laboratory waste are presented. Under those conditions the ion exchangers become darkened and break up. The dynamic exchange capacity falls by 30 to 45%. The coefficients representing the purification of the solutions from Cs137, Sr90 and S 35 are nevertheless no lower than those achieved with new ion exchangers. The capacity of anion exchanger AN-2F may be increased by 20% after treating with a 0.5 N solution of nitric acid. After three years operation, the ion exchangers are still suitable for further use in the purification plant.
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