Radionuclide Adsorbent, Method of Producing Radionuclide Adsorbent and Production Apparatus Thereof

摘要

Granular crystalline silicotitanate (CST) is supplied from an adsorbent raw material supply apparatus into a caustic treatment apparatus. A sodium hydroxide solution of 1 Mol/L in a caustic agent supply apparatus is supplied into the caustic treatment apparatus with the granular CST supplied. After a predetermined quantity of the sodium hydroxide solution is supplied to the caustic treatment apparatus, the supply of the sodium hydroxide solution to the caustic treatment apparatus is stopped. The granular CST is left to stand for 0.5 hour in the state that it is immersed in the sodium hydroxide solution in the caustic treatment apparatus and is subjected to the caustic treatment. After that, the granular CST subjected to the caustic treatment is cleaned by cleaning water in a cleaning water supply apparatus. The respective adsorptive performances of cesium and strontium of the granular CST subjected to the caustic treatment are improved more.

主权项

1. A method of producing a radionuclide adsorbent, the steps of:
storing a silicotitanate compound in a caustic treatment apparatus, and bring said silicotitanate compound into contact with a sodium hydroxide solution having a sodium hydroxide concentration within a range of 0.5 Mol/L or more but less than 2.0 Mol/L in said caustic treatment apparatus.