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Abstract

Thermal stability and spontaneous ignition conditions of uranium hydride and uranium metal fine powders have been studied and observed in an original and dedicated experimental device placed inside a glove box under flowing pure argon. Pure uranium hydride powder with low amount of oxide (<0.5 wt.%) was obtained by heat treatment at low temperature in flowing Ar/5%H(2). Pure uranium powder was obtained by dehydration in flowing pure argon. Those fine powders showed spontaneous ignition at room temperature in air. An in situ CCD-camera displayed ignition associated with powder temperature measurement. Characterization of powders before and after ignition was performed by XRD measurements and SEM observations. Oxidation mechanisms are proposed.

Additional information

Authors: LE GUYADEC F, CEA Marcoule, Bagnols sur Cèze (FR);GÉNIN X, CEA Marcoule, Bagnols sur Cèze (FR);BAYLE J P, CEA Marcoule, Bagnols sur Cèze (FR);DUGNE O, CEA Marcoule, Bagnols sur Cèze (FR);DUHART-BARONE A, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);ABLITZER C, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: Journal of Nuclear Materials, Volume 396, Issues 2-3, January 2010, Pages 294-302
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/10.1016/j.jnucmat.2009.11.007
Record Number: 201010029 / Last updated on: 2010-01-13
Category: PUBLICATION
Original language: en
Available languages: en