| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a treatment method for transforming zirconium existing in high level radioactive solution in a condition that is hard to be separated into removable precipitate. SOLUTION: Fine precipitate, colloid or dissolved state zirconium exist with other nuclear fission product in dissolved liquid of used nuclear fuel and high level radioactive solution produced according to reprocessing of used nuclear fuel. The zirconium existing with these state is not fractionated easily by ordinary filtering operation, but it is transformed into precipitate of easily fractionable character by ordinary filtering operation by adding reagent such as phosphoric acid, phosphate, molybic acid, molybdate, telluric acid or tellurate producing precipitation by acting with zirconium. Forming of precipitate may be promoted by combining the addition of the reagent and heat treatment.</p> |
