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Canning by the diffusion caused by a heated die; Gainage par diffusion par filiere chauffante

Abstract

In this process, the uranium fuel is clad with a zirconium can by passing the element through a die. The operation takes place at a temperature varying between 500 and 1000 deg. C. The heating is obtained by passing low voltage electric current through the can. This process differs from the co-extrusion process in that the uranium is not deformed. The uranium is therefore machined to the final dimensions before canning, it can also be hollow. Two types of processes can be adopted for the extrusion: a) Process in which the binding of the can to the uranium is obtained without diffusion (here the can is at high temperature - subsequently cooled - and the uranium is at a low temperature); b) Process in which uranium-zirconium diffusion is initiated. No matter which process is adopted the element is subsequently heat treated in an over at 800 deg. C in order to obtain the final diffusion. The quality of this diffusion is dependent on the initial state of the surfaces and on the degree of vacuum maintained during the operation. (author) [French] Dans ce procede, la gaine zirconium est plaquee sur le combustible uranium par passage dans une filiere. L'operation a  More>>
Authors:
Gauthron, M [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-1296
Resource Relation:
Conference: Symposium on Solid State Diffusion, Colloque sur la diffusion a l'etat solide, Saclay (France), 3-5 Jul 1958
Subject:
36 MATERIALS SCIENCE; ADHESION; CANNING; DIES; DIFFUSION; ELECTRIC HEATING; FUEL-CLADDING INTERACTIONS; PHOTOMICROGRAPHY; POROSITY; SHRINKAGE; TEMPERATURE RANGE 1000-4000 K; THERMOMECHANICAL TREATMENTS; URANIUM BASE ALLOYS; VACUUM SYSTEMS; ZIRCONIUM ADDITIONS
OSTI ID:
20940774
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR07R1296094252
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
11 pages
Announcement Date:
Nov 22, 2007

Citation Formats

Gauthron, M. Canning by the diffusion caused by a heated die; Gainage par diffusion par filiere chauffante. France: N. p., 1959. Web.
Gauthron, M. Canning by the diffusion caused by a heated die; Gainage par diffusion par filiere chauffante. France.
Gauthron, M. 1959. "Canning by the diffusion caused by a heated die; Gainage par diffusion par filiere chauffante." France.
@misc{etde_20940774,
title = {Canning by the diffusion caused by a heated die; Gainage par diffusion par filiere chauffante}
author = {Gauthron, M}
abstractNote = {In this process, the uranium fuel is clad with a zirconium can by passing the element through a die. The operation takes place at a temperature varying between 500 and 1000 deg. C. The heating is obtained by passing low voltage electric current through the can. This process differs from the co-extrusion process in that the uranium is not deformed. The uranium is therefore machined to the final dimensions before canning, it can also be hollow. Two types of processes can be adopted for the extrusion: a) Process in which the binding of the can to the uranium is obtained without diffusion (here the can is at high temperature - subsequently cooled - and the uranium is at a low temperature); b) Process in which uranium-zirconium diffusion is initiated. No matter which process is adopted the element is subsequently heat treated in an over at 800 deg. C in order to obtain the final diffusion. The quality of this diffusion is dependent on the initial state of the surfaces and on the degree of vacuum maintained during the operation. (author) [French] Dans ce procede, la gaine zirconium est plaquee sur le combustible uranium par passage dans une filiere. L'operation a lieu a chaud, a une temperature variant entre 500 et 1000 deg. C. Le chauffage est assure par passage d'un courant basse tension dans la gaine. A la difference du procede de cofilage, l'uranium ne subit pas de deformation durant l'operation. Il est donc prealablement usine aux cotes definitives et peut etre creux. Deux processus sont possibles pendant le passage dans la filiere: a) Obtention d'un frettage de la gaine sur l'uranium sans diffusion (avec une gaine a haute temperature et un tube d'uranium a basse temperature, eventuellement refroidi); b) Obtention d'un commencement de diffusion uranium-zirconium. Quelque soit le processus adopte, la cartouche est ensuite traitee dans un four a 800 deg. C pour obtenir la diffusion definitive. La qualite de celle-ci depend essentiellement des etats de surface initiaux et de la qualite du vide pendant l'operation. (auteur)}
place = {France}
year = {1959}
month = {Jul}
}