Patent Number: 062185926
Section: abstract

A method for the treatment of radioactive evaporator concentrates from the evaporation system of nuclear plants comprises the steps of. (a) freeing the evaporator concentrates from undissolved components, PA1 (b) crystallizing the sodium sulfate contained in the evaporator concentrates as Glauber's salt (Na.sub.2 SO.sub.4.10 H.sub.2 O) on an immersion cooler, PA1 (c) recrystallizing the Glauber's salt deposited on the immersion cooler, PA1 (d) optionally, repeating the recrystallization step (c) once or several times, PA1 (e) separating essentially inactive sodium sulfate from the process, and PA1 (f) recycling the depleted evaporator concentrates of step (a) to the evaporation system.