October 24, 2019 by admin 0 Comments

3D Printing of Zeolite for Adsorption of Radioisotopes from a Nuclear Reactor Coolant

Sujeong Lee (a), Ho Jin Ryu (a, *)
In operating nuclear power plants, the radionuclides are present in the reactor coolant system. These radionuclides are generated primarily by activation of dissolved ions released from structural components into the coolant. These isotopes should be removed for treating liquid wastes in aspect of safety and economically. There are many studies on the adsorption of dissolved Co (Ⅱ) and Ni (Ⅱ) ions by inorganic adsorbents (e.g. molecular sieve, kaolinite clay). Treatment of the liquid wastes with the inorganic adsorbent is preferred because of its high exchange capacity, possible selectivity and specificity, good resistant to radiation. Manufacturing of ceramic filters is difficult because of brittleness of ceramics. Furthermore, fabrication cost for ceramics is five times higher than fabricating of polymers. Thus, ceramic 3D printing based on extrusion of slurry ink has an advantage in making a filter of adsorbents, because 3D printing can reduce processing time and cost to form a complex filter structure.