Powder of an alloy based on uranium and molybdenum in gamma-metastable phase, composition of powders comprising this powder, and uses of said powder and composition

A composition, metastable phase technology, applied in the powder field of alloys, which can solve problems such as uncertainty

Inactive Publication Date: 2014-03-12
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, if these fuels are subjected to irradiation levels higher than those used in the aforementioned references [5] to [8], for example, 500 W / cm 2 With surface power densities of irradiation and U-235 consumption rates in excess of 50%, there are many uncertainties regarding the ability of this matrix to improve the properties of uranium- and molybdenum-based nuclear fuels

Method used

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  • Powder of an alloy based on uranium and molybdenum in gamma-metastable phase, composition of powders comprising this powder, and uses of said powder and composition
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  • Powder of an alloy based on uranium and molybdenum in gamma-metastable phase, composition of powders comprising this powder, and uses of said powder and composition

Examples

Experimental program
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Effect test

Embodiment 1

[0060] Example 1: Deposition of an aluminum oxide layer on a solid substrate made of γ-U(8Mo) alloy

[0061] By pulsed laser deposition technology, an aluminum oxide layer with a thickness of about 50nm, 100nm or 400nm is deposited on a substrate with a measured length of 4±0.5mm, a width of 4±0.5mm and a thickness of 1±0.5mm, and the substrate is made of An alloy of uranium and molybdenum (8% molybdenum by mass) in the γ-metastable phase (γ-U(8Mo)).

[0062] As this technique is well known, it is only briefly recalled that it involves bombardment, a vacuum box, a target consisting of the material to be deposited with a pulsed laser beam. When the laser power density is high enough, a certain amount of material is ejected from the target perpendicular to the surface and deposited on the substrate, which may have been heated and placed relative to the target.

[0063] In the present case, the target used was an aluminum target and the pressure in the box was 10 -6 On the orde...

Embodiment 2

[0072] Example 2: Chemical reactivity of a solid substrate made of γ-U(8Mo) alloy covered with an aluminum oxide layer in the presence of aluminum or Al(7Si) alloy

[0073] As described in Example 1 above, in the case of diffusion pairs activated by heat treatment, first, in the presence of aluminum, the chemical reaction of a substrate made of γ-U(8Mo) alloy already covered with a layer of aluminum oxide was tested Second, in the presence of an alloy (Al(7Si)) of aluminum and silicon (7% silicon by mass), the substrate made of γ-U(8Mo) alloy, which has been covered with an aluminum oxide layer, was tested for chemical reactivity.

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Abstract

The subject of the invention is a powder of an alloy comprising uranium and molybdenum in gamma-metastable phase, a composition of powders comprising this powder and also the uses of said alloy powder and of said composition of powders. The alloy powder comprising uranium and molybdenum in gamma-metastable phase according to the invention is formed of particles comprising a core which consists of said alloy and which is coated with a layer of alumina located in contact with this core. Applications: manufacture of nuclear fuel elements and, in particular, of fuel elements for experimental nuclear reactors; manufacture of targets intended for the production of radioelements, of use in particular for medical imaging such as technetium 99m.

Description

technical field [0001] The present invention relates to a powder of an alloy based on uranium and molybdenum in the γ-metastable phase and, in particular, to a powder of a U(Mo) binary alloy or a U(MoX) ternary alloy, Wherein, X represents other chemical elements other than uranium and molybdenum. [0002] The invention also relates to a powder composition comprising the alloy powder mixed with a powder comprising aluminum. [0003] The invention also relates to the use of the alloy powder and the powder composition. [0004] In fact, this alloy powder and this powder composition can be used for the manufacture of nuclear fuel elements and, in particular, for the manufacture of fuel elements for experimental nuclear reactors, better known by the acronym MTR (Material Test Reactor). known as, for example, the Jules Horowitz Reactor (JHR) of the CEA in Cadarache (France), the High Flux Reactor (HFR) of the Institut Laue-Langevin in Grenoble (France), or also High neutron flux...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02G21C3/42C22C43/00G21C3/60G21C21/02B22F1/142B22F1/16
CPCB22F1/0085C23C14/223Y02E30/38C22C43/00C22C21/02G21C21/02B22F1/02C22C1/0416G21C3/60C22C1/10C23C16/4417B22F3/00C23C14/081C23C16/403G21C3/42Y10T428/2982Y02E30/30B22F1/16B22F1/142
Inventor 杰罗姆·阿勒努泽维尔·伊尔蒂斯弗朗索瓦·夏洛莱斯奥利维尔·特奥赫艾特马修·帕斯图尔勒斯蒂芬妮·德普蒂尔
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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