公开(公告)号：US11175415B2

公开(公告)日：2021-11-16

申请号：US16954577

申请日：2018-12-18

申请人： ORANO CYCLE

发明人： Jacky Jehanno

IPC分类号： G01T1/167 ,  G01T7/02

摘要： A method of determining a quantity of a first radioisotope in a source term, disintegrating into a second radioisotope, the radioisotopes respectively emitting first and second gamma rays screened by the source term, the method comprising the steps: a) determining the theoretical ratio of counts between the first and second rays emitted in the absence of screening; b) measuring the net counts associated with the first and second rays emitted by the first and second radioisotopes; c) determining the screening rates of the first and second rays by the source term based on the ratio obtained in step a) and the counts obtained in step b); d) determining the quantity of the first radioisotope based on the screening rate of either the first or the second ray determined in step c).

公开(公告)号：US20190189298A1

公开(公告)日：2019-06-20

申请号：US16310471

申请日：2017-06-21

申请人： Orano Cycle ,  COMMISSARIAT Á L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES

发明人： Gilles Leturcq ,  Thibaud Delahaye

IPC分类号： G21C19/46

CPC分类号： G21C19/46 ,  Y02W30/883

摘要： A process for dissolving nuclear fuel, in particular irradiated nuclear fuel, comprising immersion of the nuclear fuel in a nitric acid solution. This dissolution process further comprises mechanical milling of the nuclear fuel, this mechanical milling being performed in the nitric acid solution during the immersion. The disclosure also relates to the use of a mill equipped with mechanical milling structure to implement the dissolution process.

公开(公告)号：US11264143B2

公开(公告)日：2022-03-01

申请号：US16330142

申请日：2017-09-06

申请人： COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES ,  Orano Cycle

发明人： Agnès Grandjean ,  Virginie Fremy ,  Alexandre Charlot ,  Yves Barre

IPC分类号： G21F9/12 ,  B01J20/04 ,  B01J20/28 ,  B01J20/32 ,  C02F1/28 ,  C01C3/12 ,  C01C3/08 ,  C02F101/00 ,  C02F101/20 ,  C02F103/08

摘要： Solid nanocomposite material comprising nanoparticles of a hexacyanometallate or octacyanometallate of an alkali metal and of a transition metal, of formula [Alk+x]Mn+[M′(CN)m]z− in which Alk is an alkali metal, x is 1 or 2, M is a transition metal, n is 2 or 3, M′ is a transition metal, m is 6 or 8, z is 3 or 4, attached to at least one surface of a porous inorganic solid support, in which the nanoparticles are attached by adsorption to the at least one surface of the solid support, and in which the surface is a basic surface. Method for preparing this material. Method for extracting at least one metal cation from a liquid medium containing it, wherein the liquid medium is brought into contact with the material.

公开(公告)号：US20210332002A1

公开(公告)日：2021-10-28

申请号：US16479830

申请日：2018-01-25

申请人： COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÊNERGIES ALTERNATIVES ,  Orano Cycle ,  ELECTRICITE DE FRANCE

发明人： Gaëlle Milanole ,  Emilie Russello ,  Cécile Marie ,  Manuel Miguirditchian ,  Christian Sorel

IPC分类号： C07C233/05 ,  C22B3/32 ,  G21C19/46 ,  C22B60/02 ,  C22B60/04

摘要： A dissymmetric RN,N-dialkylamides of formula (I) in which: R1 represents a linear C1 to C4 alkyl, R2 represents a linear C1 to C10 alkyl, and R3 represents a linear or branched C6 to C15 alkyl, where R3 is different from a n-octyl, n-decyl, n-dodecyl, 2-ethylhexyl and 2-ethyloctyl group when R1 represents a n-butyl group and R2 represents an ethyl group. A method for synthesising the N,N-dialkylamides, and uses of same for extracting uranium and/or plutonium from an aqueous acid solution or for fully or partially separating the uranium from the plutonium contained in an aqueous acid solution and a solution resulting from the dissolution of spent nuclear fuel in nitric acid. A method for treating an aqueous solution resulting from the dissolution of spent nuclear fuel in nitric acid, which allows the uranium and the plutonium contained in the solution to be extracted, separated and decontaminated in a single cycle.

公开(公告)号：US10354765B2

公开(公告)日：2019-07-16

申请号：US15768780

申请日：2016-10-18

申请人： COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES ,  Orano Cycle

发明人： Xavier Heres ,  Gilles Bernier ,  Binh Dinh ,  Patrick Pochon ,  Danièle Sans ,  Elisabeth Zekri

IPC分类号： G21C19/46 ,  C01G56/00 ,  G21F9/06 ,  G21F9/12

摘要： The use of hydroxyiminoalkanoic acids including at least four carbon atoms as anti-nitrous agents in operations of reductive stripping of plutonium. The invention may be useful in any method for processing spent nuclear fuels that includes one or more operations of reductive stripping of plutonium and, more particularly, in the PUREX method as implemented in modern nuclear fuel processing plants, as well as in processes derived therefrom.

公开(公告)号：US10347383B2

公开(公告)日：2019-07-09

申请号：US15110497

申请日：2015-01-14

申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES ,  Orano Cycle

发明人： Julien Martinez ,  Fabienne Audubert ,  Nicolas Clavier ,  Nicolas Dacheux

IPC分类号： C01G1/02 ,  G21C3/62 ,  C01G25/02 ,  C01G27/02 ,  C01G56/00 ,  C01G43/025 ,  C01F17/00 ,  C01F15/00 ,  G01N27/407 ,  G21C21/02 ,  H01M8/1246 ,  H01M8/126 ,  H01M8/124

摘要： A process is provided for preparing a powder of an oxide of at least one metal, each metal having an oxidation number between (III) and (VI). This process comprises successively and in this order: (a) reacting, with a compound comprising a hydroxide, an aqueous solution comprising, for each metal, at least one salt of the cation of said metal, (b) separating the precipitate obtained, (c) contacting the separated precipitate with an organic protic polar solvent, (d) removing the organic protic polar solvent by vacuum drying the precipitate. A process is further provided for manufacturing a pellet of an oxide of at least one metal as well as to a powder and to a pellet obtained according to these processes and to uses thereof.

公开(公告)号：US20210363609A1

公开(公告)日：2021-11-25

申请号：US16625557

申请日：2018-06-28

申请人： COMMISSARIAT A L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES ,  Orano Cycle ,  ELECTRICITE DE FRANCE

发明人： Cécile Marie ,  Clémence Berger ,  Guillaume Mossand ,  Emilie Russello ,  Eugen Andreiadis ,  Dominique Guillaumont ,  Manuel Miguirditchian ,  Christian Sorel

IPC分类号： C22B60/02 ,  G21C19/46 ,  C22B60/04 ,  C22B3/26

摘要： The-use of carbamides as extractants for fully or partially separating uranium(VI) from plutonium(IV) in an aqueous solution obtained by dissolving a spent nuclear fuel in nitric acid, by method of liquid-liquid extraction, without carrying out any reduction of the plutonium(IV) to plutonium(III). The invention also relates to new carbamides. Uses are the processing of spent nuclear fuels based on uranium (especially uranium oxides—UOX) or uranium and plutonium (especially mixed uranium and plutonium oxides—MOX).

公开(公告)号：US20200333475A1

公开(公告)日：2020-10-22

申请号：US16954577

申请日：2018-12-18

申请人： ORANO CYCLE

发明人： Jacky Jehanno

IPC分类号： G01T1/167 ,  G01T7/02

摘要： A method of determining a quantity of a first radioisotope in a source term, disintegrating into a second radioisotope, the radioisotopes respectively emitting first and second gamma rays screened by the source term, the method comprising the steps: a) determining the theoretical ratio of counts between the first and second rays emitted in the absence of screening; b) measuring the net counts associated with the first and second rays emitted by the first and second radioisotopes; c) determining the screening rates of the first and second rays by the source term based on the ratio obtained in step a) and the counts obtained in step b); d) determining the quantity of the first radioisotope based on the screening rate of either the first or the second ray determined in step c).

公开(公告)号：US10031239B2

公开(公告)日：2018-07-24

申请号：US14767882

申请日：2014-02-19

申请人： Orano Cycle

发明人： Jean-Marc Fontbonne ,  Jean Colin ,  Cathy Fontbonne ,  Jacky Jehanno

IPC分类号： G01T1/00 ,  G01T1/02

摘要： A method for measuring dosage by means of a radiation detector, especially an X-radiation or gamma-radiation detector, used in the spectroscopic mode, and a dosage measurement system using said method.A range of energies and a dose type H is chosen, a radiation detector of a given type is used, spectra measured by the detector are established for various radiations of the given type, the energies of which are within the chosen range and the respective doses of which are known, and from the spectra, a weighting function is established, that is a correspondence between a mean dose increment and a mean energy, deposited into the detector. This enables a person provided with a dosimeter identical to the detector to know at any time the mean absorbed dose rate, expressed in the amount H.

公开(公告)号：US11594344B2

公开(公告)日：2023-02-28

申请号：US16770836

申请日：2018-12-07

申请人： ORANO CYCLE ,  COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES

发明人： François Poncelet ,  Nicolas Vigier ,  Bénédicte Arab-Chapelet ,  Aurélie Gauthe ,  Eléonore Welcomme ,  Marie Hélène Noire

IPC分类号： G21C19/46 ,  C01G43/01 ,  C01G56/00 ,  G21C3/62

摘要： A method for preparing a powder comprising an intimate mixture of U3O8 particles and PuO2 particles and which may further comprise particles of ThO2 or NpO2. The method comprises: preparing, via oxalic precipitations, an aqueous suspension S1 of particles of uranium(IV) oxalate and an aqueous suspension S2 of particles of plutonium(IV) oxalate; mixing the aqueous suspension S1 with the aqueous suspension S2 to obtain an aqueous suspension S1+2; separating the aqueous suspension S1+2 into an aqueous phase and a solid phase comprising the particles of uranium(IV) oxalate and the particles of plutonium(IV) oxalate; and calcining the solid phase to convert (1) the particles of uranium(IV) oxalate to particles of triuranium octoxide and (2) the particles of plutonium(IV) oxalate to particles of plutonium(IV) dioxide, whereby the powder is obtained.