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Method for preparing a porous nuclear fuel containing at least one minor actinide

A technology of minor actinides and elements, applied in the direction of reactor fuel elements, reactor fuel materials, nuclear engineering, etc., can solve problems such as the impossibility of obtaining controlled porosity of fuel

Inactive Publication Date: 2012-05-30
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Therefore, taking into account the prior art methods related to the manufacture of fuels containing minor actinides, the inventors of the present invention set forth the aim of developing a method which does not have the disadvantages inherent in the use of organic blowing agents , that is, these reagents degrade as soon as they are used to mix fuel precursors, and it is therefore impossible to obtain controlled porosity of fuels

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  • Method for preparing a porous nuclear fuel containing at least one minor actinide
  • Method for preparing a porous nuclear fuel containing at least one minor actinide
  • Method for preparing a porous nuclear fuel containing at least one minor actinide

Examples

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Embodiment 1

[0087] This example illustrates the preparation of a mixed oxide fuel comprising both uranium and americium according to the method of the invention.

[0088] The method applied according to this embodiment comprises the following steps:

[0089]- by grinding 10 g of UO in a stainless steel bowl containing two grinding balls in an oscillating mill at 15 Hz 2 / AMO 2 (according to the U / U+Am=0.9 ratio) the step of co-milling for 30 minutes for the preparation of the first mixture;

[0090] - Prepare a second mixture U with a mass of 10 g in an oscillating mill at 15 Hz in a stainless steel bowl containing two grinding balls within 30 minutes 3 o 8 / AMO 2 , while observing the step of U / U+Am=0.9 ratio. Based on the mass of the final mixture, U was introduced in an amount of 40% by mass 3 o 8 .

[0091] - for the first mixture UO 2 / AMO 2 Steps for storage in stainless steel containers;

[0092] - in parallel, with the matrix and the lubrication of the piston (with stea...

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Abstract

The invention relates to a method for manufacturing a porous fuel including uranium, optionally plutonium, and at least one minor actinide, including the following consecutive steps: a) a step of compacting, into pellets, a mixture of powders including uranium oxide, optionally plutonium oxide, and at least one minor actinide oxide, at least a portion of the uranium oxide being in the form of triuranium octaoxide (U3O8), the other portion being in the form of uranium dioxide (UO2); and b) a step of reducing at least one portion of the triuranium octaoxide (U3O8) into uranium dioxide (UO2).

Description

technical field [0001] The present invention relates to a method for the preparation of porous nuclear fuel comprising uranium, optionally plutonium and at least one minor actinide, using steps involving powders of these elements. [0002] This method may find its application particularly in the cycle of minor actinides by introducing these minor actinides in the aforementioned fuels intended for use in the formation of nuclear rods for nuclear reactors, or further into the conversion of palladium composition in order to carry out nuclear transformation experiments notable for a better understanding of the transformation mechanisms of these minor actinides. [0003] For the following discussion, the minor actinides are defined as those actinides other than uranium, plutonium, and thorium that are formed in reactors by the continuous capture of neutrons by standard fuel nuclei, said minor actinides being americium, curium and neptunium. Background technique [0004] Current...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/62G21C19/46
CPCG21C19/46G21C3/623Y02E30/38Y02E30/40Y02E30/30Y02W30/50
Inventor 奥雷利安·杨科维克纳塔莉·赫莱特卡罗莱恩·里奥里尔尼古拉斯·阿施蒂尔菲利普·科斯特芭芭拉·德沙姆普斯达米安·普里尔菲利普·布朗夏特
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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