Redox Potential Evolution of Nitric Species and Plutonium in HNO3-HNO2 System

In France, the reprocessing process of spent fuel is carried out using the Purex process. The first chemical step of this process is the dissolution of the spent fuel in aqueous concentrated nitric acid. This dissolution solution is composed of many oxidizing species and it is necessary to understan...

Full description

Saved in:
Bibliographic Details
Main Authors: Larabi-Gruet, Nathalie, Buravand, Emilie, Gwinner, Benoit, Robin, Raphael, Fauvet, P.
Format: Conference Proceeding
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In France, the reprocessing process of spent fuel is carried out using the Purex process. The first chemical step of this process is the dissolution of the spent fuel in aqueous concentrated nitric acid. This dissolution solution is composed of many oxidizing species and it is necessary to understand the chemistry of these species to apprehend the behavior of structural materials. The redox potential is a useful discriminate variable to differentiate the effect of each species. In this framework, only the effect of NO3-/HNO2 couple and PuO22+/Pu4+ couple were investigated. These species were chosen because one is the main couple of medium and the other has a high standard potential. Their influence was investigated from the Nernst's equation.
ISSN:1938-5862
1938-6737
DOI:10.1149/1.3692524