Method for preparing a porous nuclear fuel

A technology of fuel and feed liquid, which is applied in the fields of reactor fuel elements, reactor fuel materials, nuclear engineering, etc., and can solve the problem of impossible to obtain fuel.

Active Publication Date: 2014-04-16
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

Therefore, it is not possible to obtain fuels with controllable porosity

Method used

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  • Method for preparing a porous nuclear fuel
  • Method for preparing a porous nuclear fuel
  • Method for preparing a porous nuclear fuel

Examples

Experimental program
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Embodiment 1

[0084] This example illustrates the method according to the invention to produce 2 Porous fuel of uranium oxide.

[0085] This production includes:

[0086] Prepare U 3 o 8 small ball steps;

[0087] Preparation of UO 2 small ball steps;

[0088] dry mix u 3 o 8 small ball or uo 2 small ball steps;

[0089] the step of compacting said mixture;

[0090] Step of reducing and sintering the mixture thus compacted.

[0091] a) U 3 O 8 Preparation of pellets

[0092] First, by adding 39 g of uranium trioxide UO 3 A feed solution of acid-deficient uranyl nitrate was prepared by dissolving in 1 L of 260 mM uranyl nitrate solution until saturated. After filtration, the uranyl solution is partially hydrolyzed, thus giving the corresponding formula UO 2 (NO 3 ) 1.3 (OH) 0.7 . The final concentration of uranium was 400 mM and the pH was raised to 3.4, which constituted sufficient conditions for cation exchange on the carboxylic acid type resin.

[0093] Secon...

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Abstract

The invention relates to a method for producing a porous fuel including uranium, optionally plutonium, and optionally at least one minor actinide, which includes the following series of steps: a) a step of compacting a mixture including a first type of agglomerate including uranium oxide in the form of uranium dioxide UO2, optionally plutonium oxide, and optionally at least one minor-actinide oxide, and a second type of agglomerate including uranium oxide in the form of triuranium octaoxide U3O8, optionally plutonium oxide, and optionally at least one minor-actinide oxide; b) a step of reducing the compacted mixture in a reducing medium so as to reduce all or part of the triuranium octaoxide U3O8 into uranium dioxide UO2, the second type of agglomerate being prepared prior to the compacting step by a series of specific operations.

Description

technical field [0001] The present invention relates to a method for the production of porous nuclear fuel comprising uranium, optionally plutonium and optionally at least one minor actinide, performing steps not involving pulverulent compounds of these elements. [0002] In particular, this method may find application in the reuse of minor actinides by their incorporation into the aforementioned fuels to be used to make up the nuclear rods of nuclear reactors or to enter the composition of transmutation targets , to conduct nuclear transmutation experiments, especially to better understand the mechanism of the transmutation of the minor actinides. [0003] More generally, the method may simply find application in the manufacture of porous fuels including uranium. [0004] It is noted that, in the rest of this specification, minor actinides means actinides other than uranium, plutonium and thorium, which are formed in reactors by the continuous capture of neutrons by nuclei o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/62
CPCG21C3/62G21C3/623Y02E30/38Y02E30/30G21C21/00
Inventor 塞巴斯蒂安·皮卡特埃洛迪·雷米蒂博·德拉艾
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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