INTERPRETATION OF AT-LINE SPECTRA FROM AFS-2 BATCH #3 FERROUS SULFAMATE TREATMENT

Kyser, E. ; O'Rourke, P.

关键词: H-Canyon;    HB-Line;    Pu Valence;    MOX;    AFS-2;    Pu(VI);    Spectroscopy;   

DOI  :  10.2172/1111770
RP-ID  :  SRNL-STI-2013-00694
PID  :  OSTI ID: 1111770

学科分类：化学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Spectra from the ???at-line??? spectrometer were obtained during the ferrous sulfamate (FS) valence adjustment step of AFS-2 Batch #3 on 9/18/2013. These spectra were analyzed by mathematical principal component regression (PCR) techniques to evaluate the effectiveness of this treatment. Despite the complications from Pu(IV), we conclude that all Pu(VI) was consumed during the FS treatment, and that by the end of the treatment, about 85% was as Pu(IV) and about 15% was as Pu(III). Due to the concerns about the ???odd??? shape of the Pu(IV) peak and the possibility of this behavior being observed in the future, a follow-up sample was sent to SRNL to investigate this further. Analysis of this sample confirmed the previous results and concluded that it ???odd??? shape was due to an intermediate acid concentration. Since the spectral evidence shows complete reduction of Pu(VI) we conclude that it is appropriate to proceed with processing of this the batch of feed solution for HB-Line including the complexation of the fluoride with aluminum nitrate.