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Industrial treatment of solutions of fission products. Separation of caesium-137; Traitement industriel de solutions de produits de fission. Separation du cesium-137

Abstract

Two types of chemical treatment can be considered for the manufacture of solid sources for industrial uses from fission product solutions remaining after plutonium extraction: a) concentration of the solution and preparation of solid sources from the bulk material, without separation, b) separation of one or several fission products from which the sources are made. Examination of the radio-chemical composition of the mixture of fission products that will be available from the Marcoule reactors (G1, G2 and G3) shows that caesium-137 accounts for 30 per cent of the {gamma} energy available immediately after the plutonium separation, 70 per cent two years after and 100 per cent after five years. There is practically no advantage in making sources from bulk fission products, since the separation of caesium-137 is no more complicated and yet it results in a material with more potential uses. The separation of caesium-137 by a method based on the standard phospho-tungstate precipitation method has been considered. Previously, the precipitated caesium phospho-tungstate was dissolved and caesium was recovered from the solution by cation-exchange or by removal of phosphate and tungstate ions by anion-exchange. A study has now been made, of the metathesis of caesium phospho-tungstate to barium phosphate and  More>>
Authors:
Fisher, C; Raggenbass, A [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France).Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1959
Product Type:
Technical Report
Report Number:
CEA-R-1214
Resource Relation:
Other Information: 9 refs
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 07 ISOTOPES AND RADIATION SOURCES; BARIUM HYDROXIDES; BARIUM PHOSPHATES; CESIUM 137; CHEMICAL COMPOSITION; DECONTAMINATION; FISSION PRODUCTS; GAMMA DOSIMETRY; PRECIPITATION; RADIOACTIVE WASTE PROCESSING; SOLUTIONS; TIME DEPENDENCE; TUNGSTATES
OSTI ID:
20940733
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR07R1214094211
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
13 pages
Announcement Date:
Nov 22, 2007

Citation Formats

Fisher, C, and Raggenbass, A. Industrial treatment of solutions of fission products. Separation of caesium-137; Traitement industriel de solutions de produits de fission. Separation du cesium-137. France: N. p., 1959. Web.
Fisher, C, & Raggenbass, A. Industrial treatment of solutions of fission products. Separation of caesium-137; Traitement industriel de solutions de produits de fission. Separation du cesium-137. France.
Fisher, C, and Raggenbass, A. 1959. "Industrial treatment of solutions of fission products. Separation of caesium-137; Traitement industriel de solutions de produits de fission. Separation du cesium-137." France.
@misc{etde_20940733,
title = {Industrial treatment of solutions of fission products. Separation of caesium-137; Traitement industriel de solutions de produits de fission. Separation du cesium-137}
author = {Fisher, C, and Raggenbass, A}
abstractNote = {Two types of chemical treatment can be considered for the manufacture of solid sources for industrial uses from fission product solutions remaining after plutonium extraction: a) concentration of the solution and preparation of solid sources from the bulk material, without separation, b) separation of one or several fission products from which the sources are made. Examination of the radio-chemical composition of the mixture of fission products that will be available from the Marcoule reactors (G1, G2 and G3) shows that caesium-137 accounts for 30 per cent of the {gamma} energy available immediately after the plutonium separation, 70 per cent two years after and 100 per cent after five years. There is practically no advantage in making sources from bulk fission products, since the separation of caesium-137 is no more complicated and yet it results in a material with more potential uses. The separation of caesium-137 by a method based on the standard phospho-tungstate precipitation method has been considered. Previously, the precipitated caesium phospho-tungstate was dissolved and caesium was recovered from the solution by cation-exchange or by removal of phosphate and tungstate ions by anion-exchange. A study has now been made, of the metathesis of caesium phospho-tungstate to barium phosphate and tungstate by the action of barium hydroxide, the caesium being obtained in solution as the hydroxide. The advantages of this new procedure are: - greater decontamination of caesium-137 without further purification, - possibility of direct transformation to caesium sulphate, - general simplification of the procedure and, consequently, of the equipment. (author) [French] Deux types de traitement chimique peuvent etre envisages pour amener a l'etat de sources solides utilisables industriellement les produits de fission contenus dans les solutions residuaires de l'extraction du plutonium. Ces traitements sont les suivants: a) concentration des solutions et confection de sources solides a partir du melange brut, sans separation; b) separation d'un ou plusieurs produits de fission determines a partir desquels sont confectionnees les sources. L'examen de la composition radioactive du melange de produits de fission resultant de l'exploitation des reacteurs de Marcoule (G1, G2 et G3) montre que le cesium-137 represente a lui seul 30 pour cent de l'energie {gamma} disponible a la sortie de l'usine plutonium, 70 pour cent deux ans apres et pratiquement 100 pour cent au bout de 5 ans. Il n'y a donc qu'un interet minime a entreprendre la confection de sources avec le melange de produits de fission, la separation du cesium ne representant pas un travail plus complique et conduisant a un produit dont les possibilites d'utilisation sont plus nombreuses. Nous avons envisage la separation du cesium-137 par une methode derivee de la methode connue basee sur la precipitation du cesium par l'acide phosphotungstique. Dans les methodes publiees, le phosphotungstate est completement dissous et le cesium est extrait de la solution par echange de cations ou par elimination des ions phosphates et tungstates sur une resine echangeuse d'anions. Nous avons etudie la transformation du phosphotungstate de cesium en phosphate et tungstate de baryum par emploi de l'hydroxyde de baryum qui remet le cesium en solution en hydroxyde. Les avantages sont les suivants: - decontamination plus poussee du cesium-137, sans purification supplementaire; - possibilite de transformation directe en sulfate de cesium; - simplification generale du mode operatoire, et par consequent de l'installation. (auteur)}
place = {France}
year = {1959}
month = {Jul}
}