Title :
Chemical speciation at the liquid-liquid interface: Development of a time-resolved-spectroscopy induced by the evanescent wave of a laser beam
Author :
Canto, Fabrice ; Couston, Laurent ; Vu, Trong Hung ; Charbonnel, Marie-Christine
Author_Institution :
CEA- DEN, Marcoule DRCP, Bagnols-Sur-Ceze, France
Abstract :
Liquid-liquid extraction is essential to the spent nuclear fuel reprocessing industry, and future more efficient plants will require the development of increasingly selective chemical processes. Interactions between the actinides and organic ligands must be better understood for this purpose, particularly near liquid-liquid interfaces. We therefore undertook to develop a measuring instrument combining sensitivity and spatial localization for spectroscopic analysis of this particular zone. The standard nuclearization requirements concerning such instruments led us to develop a farfield optical system with the desired sensitivity, but its spatial localization potential was too adversely impacted by interface fluid movements. In the light of the experimental findings we have reexamined the measurement and nuclearization options.
Keywords :
actinides; fibre optic sensors; fission reactor fuel reprocessing; fluorescence; organic compounds; separation; spectrochemical analysis; time resolved spectra; actinides; chemical speciation; evanescent wave; farfield optical system; interface fluid movement; laser beam; liquid-liquid extraction; liquid-liquid interface; nuclearization; organic ligands; spatial localization potential; spent nuclear fuel reprocessing; time-resolved spectroscopy; Chemical industry; Chemical lasers; Chemical processes; Fuel processing industries; Instruments; Laser beams; Nuclear fuels; Particle measurements; Spectroscopy; Standards development; Evanescence wave; Liquid-Liquid interface; Molecular Speciation; Time-resolved Laser-Induced Fluorescence;
Conference_Titel :
Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2009 First International Conference on
Conference_Location :
Marseille
Print_ISBN :
978-1-4244-5207-1
Electronic_ISBN :
978-1-4244-5208-8
DOI :
10.1109/ANIMMA.2009.5503794