SEPARATION METHOD OF DISSOLVABLE MATERIAL FROM SPENT NUCLEAR FUEL AND PYROPROCESSING HAVING THE METHOD

摘要

The present invention provides a method for separating a dissolved element from spent nuclear fuel in a front step of an electroreduction process. The method for separating a dissolved element to prevent the effect of the dissolved element to the electroreduction process includes (a) a step of inputting process salt to the spent nuclear fuel containing the dissolved element and eluting the dissolved element from the spent nuclear fuel; (b) a step of maintaining spent nuclear fuel remaining after eluting the dissolved element with a solid state, and maintaining process salt dissolved by the dissolved element with a liquid state, and separating the solid state from the liquid state; and (c) a step of precipitating the dissolved element in the process salt.