Development of analytical techniques for safeguards environmental samples

Magara, Masaaki  ; Usuda, Shigekazu; Sakurai, Satoshi ; Watanabe, Kazuo; Esaka, Fumitaka  ; Hirayama, Fumio; Lee, C. G.; Yasuda, Kenichiro   ; Kono, Nobuaki; Inagawa, Jun; Suzuki, Daisuke   ; Fukuyama, Hiroyasu; Esaka, Konomi; Iguchi, Kazunari; Ichimura, Seiji; Onodera, Takashi; Kokubu, Yoko   ; Miyamoto, Yutaka   ; Ozu, Akira  ; Chai, J.; Zhang, X.

JAERI has conducted the analysis of domestic and the IAEA samples. JAERI is developing the analytical techniques to improve the analytical ability for the safeguards environmental samples. For bulk analysis, study is focused on the improvement of reliability of isotope ratio measurements by ICP-MS. New chemical separation techniques are under development and a desolvation module is introduced to reduce the polyatomic interferences. In particle analysis, the sample preparation procedure for SIMS method is modified to measure the U/U and U/U ratios for individual particles. We are also developing fission track-TIMS method to measure uranium isotope ratios in particles of sub-micrometer size. A screening instrument of X-ray fluorescent analysis is equipped to measure elemental distribution on a swipe surface.