Actinide separation by column method using polyvinylpolypyrrolidone

Wada, Kazuma; Kazama, Hiroyuki*  ; Abe, Chikage*; Onishi, Takashi  ; Yamamoto, Masahiko   ; Taguchi, Shigeo ; Kuno, Takehiko ; Maeda, Koji  ; Idemitsu, Kazuya*; Suzuki, Tatsuya*

Elemental analysis and isotope ratio analysis of actinides in spent fuel and debris generated in a severe accident can provide valuable information such as burnup. For such analyses, mass spectrometry such as ICP-MS and TIMS are one of the powerful tools. The mass spectrometry requires mutual separation of actinides for the removal of isobaric interferences. In the present study, we developed an actinide separation using polyvinylpolypyrrolidone as a pretreatment for mass spectrometry. The adsorption behavior of actinides was confirmed by batch experiments, and mutual separation were conducted by column method. As results, we confirmed that tetravalent and hexavalent actinides adsorb on polyvinylpolypyrrolidone, but trivalent actinides do not adsorb. We confirmed that trivalent/tetravalent/hexavalent actinides can be separated.