Development of treatment method for analytical waste solutions in STRAD project, 3; Separation of ammonia by vaporization

Matsuura, Haruaki*; Kobayashi, Ami*; Miyoshi, Masahide*; Aihara, Haruka   ; Watanabe, So  ; Nomura, Kazunori  

Treatment of radioactive waste solution containing various chemical reagents would be critical issue for decommissioning of nuclear facilities. We have targeted on the wastes containing ammonium ion which would produce ammonium nitrate. To decompose ammonium ion by catalysis, separation of ammonium ion in the solution is expected to be achieved. By using simulated waste solutions, vaporization behavior of ammonia has been investigated. As a result, about 40% of ammonia in the simulated solution with NH of 4.47 g/L was recovered by adjustment in pH and heating.