Electrochemical measurements in boiling nitric acid solutions containing radioactive elements by using small cell with a portion for spectral analysis function

Kato, Chiaki   ; Ueno, Fumiyoshi  ; Yamamoto, Masahiro ; Hakamatsuka, Yasuyuki; Ban, Yasutoshi  ; Morita, Yasuji  ; Uchiyama, Gunzo ; Nojima, Yasuo*; Fujine, Sachio*

It was reported that the metric ions such as Pu and Np contained in reprocessing solutions would accelerate corrosion of stainless steals due to those ions changing higher oxidizer. It's difficult that those ions was used in laboratory test because of radioactive elements. However it's important to understand oxide stats of those ions and electrochemical behavior on stainless steals in order to estimate corrosion rate of materials in reprocessing plats. Furthermore laboratory test with very a little solution volume is demanded for handling radioactive elements. This paper shows that developed a small electrochemical cell with a spectral analysis function and those results of polarization curves on stainless steals and oxide stats of Np(IV)/Np(V) and Pu(IV)/Pu(VI) in boiling nitric acid solutions.