METHOD FOR PROCESSING RADIOACTIVELY-CONTAMINATED WATER

摘要

The present invention provides an efficient and low cost method for processing radioactively-contaminated water. The method for processing radioactively-contaminated water comprising a freeze concentration step of generating ice having lowered concentration of radioactive substance from radioactive substance containing contaminated water and concentrating the radioactive substances in the residual contaminated water by the interface progressive freeze concentration process. Preferably, the method further comprises a nitrogen substitution step of reducing dissolved oxygen in the contaminated water and adding nitrogen gas to the contaminated water, as a previous step of the freeze concentration step. Preferably, the radioactive substance is radioactive cesium.

主权项

1. A method for processing radioactively-contaminated water comprising:
adding nitrogen gas to contaminated water containing an initial concentration of a radioactive substance, to chemically stabilize the contaminated water by reducing dissolved oxygen therein; and after adding nitrogen gas, freezing at least a portion of the contaminated water such that the frozen portion has a lower concentration of the radioactive substance than the initial concentration, and a residual unfrozen portion of the contaminated water has a higher concentration of the radioactive substance than the initial concentration.