Patents by Inventor Luis Sempere Belda

Luis Sempere Belda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210225543
    Abstract: A method for decontaminating a metal surface exposed to radioactive liquid or gas during operation of a nuclear facility comprises an oxidation step wherein a metal oxide layer on the metal surface is contacted with an aqueous oxidation solution comprising a permanganate oxidant for converting chromium into a Cr(VI) compound and dissolving the Cr(VI) compound in the oxidation solution; and a first cleaning step wherein the oxidation solution containing the Cr(VI) compound is directly passed over an anion exchange material and the Cr(VI) compound is immobilized on the anion exchange material. The method provides for substantial savings of radioactive waste and produces chelate-free waste.
    Type: Application
    Filed: January 8, 2018
    Publication date: July 22, 2021
    Inventors: Luis SEMPERE BELDA, Jose Pedro MOREIRA DO AMARAL, Christian TOPF
  • Publication number: 20210225544
    Abstract: The invention relates to a method of decontaminating a metal surface, wherein the metal surface is located on a component within a nuclear plant, in particular within the cooling system of a nuclear power plant, and is covered with a metal oxide layer containing radioactive substances, and wherein the method comprises a decontamination step in which a metal oxide layer pretreated in an oxidation step is contacted with an aqueous solution of an organic acid to dissolve the metal oxide layer, forming a decontamination solution containing the organic acid as well as metal ions and the radioactive substances, and wherein the decontamination solution is passed over an ion exchanger to immobilize the metal ions and the radioactive substances. An oxidant selected from the group consisting of oxygen, air, hydrogen peroxide and ozone is dosed into the decontamination solution to control the dissolution rate of the metal oxide layer.
    Type: Application
    Filed: June 28, 2018
    Publication date: July 22, 2021
    Inventors: Luis SEMPERE BELDA, Christian TOPF
  • Patent number: 10950360
    Abstract: A method for treating waste water from the decontamination of a metal surface in a primary coolant circuit of a nuclear reactor comprises discharging a predetermined amount of an oxidation solution from the primary coolant circuit into a reduction zone connected to the primary coolant circuit and reacting the oxidation solution with a reducing agent to form a reaction solution that is freed of oxidizing agent, and passing the reaction solution over an ion-exchange resin in order to form a desalinated solution, and returning the desalinated solution to the primary coolant and/or disposing of the desalinated solution. A waste water treatment apparatus for carrying out the method is also provided.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: March 16, 2021
    Assignee: FRAMATOME GMBH
    Inventors: Christian Topf, Luis Sempere Belda
  • Patent number: 10340050
    Abstract: A method of decontaminating metal surfaces in a cooling system of a nuclear reactor comprises: an oxidation step, comprising at least one acidic oxidation step and at least one alkaline oxidation step wherein metal oxides and radioisotopes on the metal surfaces are contacted with aqueous permanganate oxidant solutions; followed by a decontamination step wherein an aqueous solution comprising oxalic acid, formic acid, citric acid, tartaric acid, picolinic acid, gluconic acid glyoxylic acid or mixtures thereof is used to dissolve at least part of the metal oxides and radioisotopes; and a cleaning step wherein radioisotopes are immobilized on an ion exchange resin; wherein at least one treatment cycle includes a high temperature oxidation step, wherein the permanganate oxidant solution is kept at a temperature of at least 100° C.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: July 2, 2019
    Assignee: FRAMATOME GMBH
    Inventors: Luis Sempere-Belda, Christian Guenther Topf
  • Publication number: 20190074099
    Abstract: A method for treating waste water from the decontamination of a metal surface in a primary coolant circuit of a nuclear reactor comprises discharging a predetermined amount of an oxidation solution from the primary coolant circuit into a reduction zone connected to the primary coolant circuit and reacting the oxidation solution with a reducing agent to form a reaction solution that is freed of oxidizing agent, and passing the reaction solution over an ion-exchange resin in order to form a desalinated solution, and returning the desalinated solution to the primary coolant and/or disposing of the desalinated solution. A waste water treatment apparatus for carrying out the method is also provided.
    Type: Application
    Filed: March 1, 2017
    Publication date: March 7, 2019
    Applicant: Framatome GmbH
    Inventors: Christian TOPF, Luis SEMPERE BELDA
  • Patent number: 10163536
    Abstract: A process for the recovery of a radioisotope from a waste resin of a nuclear power plant comprises the steps of: a) treating a waste resin loaded with at least one radioisotope with an organic acid or alkaline compound to release the at least one radioisotope and to obtain a process solution containing the at least one radioisotope; b) separating the at least one radioisotope from the process solution through a reaction specific to the radioisotope so as to obtain a treated process solution depleted of the at least one radioisotope, wherein said depleted process solution comprises the organic acid or alkaline compound and optionally a non-reacted radioisotope; c) reacting the organic acid or alkaline compound in the depleted process solution from step b) by thermal and/or photochemical oxidation to form gaseous reaction products; and d) reloading the waste resin with the reacted process solution from step c) to bind the non-reacted radioisotope on the waste resin.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: December 25, 2018
    Assignee: Framatome GmbH
    Inventors: Franz Strohmer, Luis Sempere Belda
  • Publication number: 20180308597
    Abstract: A process for the recovery of a radioisotope from a waste resin of a nuclear power plant comprises the steps of: a) treating a waste resin loaded with at least one radioisotope with an organic acid or alkaline compound to release the at least one radioisotope and to obtain a process solution containing the at least one radioisotope; b) separating the at least one radioisotope from the process solution through a reaction specific to the radioisotope so as to obtain a treated process solution depleted of the at least one radioisotope, wherein said depleted process solution comprises the organic acid or alkaline compound and optionally a non-reacted radioisotope; c) reacting the organic acid or alkaline compound in the depleted process solution from step b) by thermal and/or photochemical oxidation to form gaseous reaction products; and d) reloading the waste resin with the reacted process solution from step c) to bind the non-reacted radioisotope on the waste resin.
    Type: Application
    Filed: November 19, 2014
    Publication date: October 25, 2018
    Inventors: Franz Strohmer, Luis Sempere Belda
  • Patent number: 9947425
    Abstract: The invention relates to a method for reducing the radioactive contamination of the surface of a component used in a nuclear reactor, which component is in contact with radioactively contaminated water, in which method a hydrophobic film is produced on the surface of a component by virtue of the surface being wetted with an aqueous solution which contains a film-forming amphiphilic substance.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: April 17, 2018
    Assignee: AREVA GMBH
    Inventors: Bernhard Stellwag, Luis Sempere-Belda, Ute Ramminger
  • Publication number: 20180033506
    Abstract: A method of decontaminating metal surfaces in a cooling system of a nuclear reactor comprises conducting a plurality of treatment cycles, with each of the treatment cycles comprising: an oxidation step wherein metal oxides including radioisotopes on the metal surfaces are contacted with an aqueous solution of a permanganate oxidant; a decontamination step after the oxidation step wherein the metal oxides are contacted with an aqueous solution of an organic acid selected from the group consisting of oxalic acid, formic acid, citric acid, tartaric acid, picolinic acid, gluconic acid, glyoxylic acid and mixtures thereof so as to dissolve at least part of the metal oxides and the radioisotopes; and a cleaning step wherein at least the radioisotopes are immobilized on an ion exchange resin; wherein the oxidation step comprises at least one acidic oxidation step and at least one alkaline oxidation step carried out one after another in either the same or different treatment cycles; and wherein the plurality of treat
    Type: Application
    Filed: February 5, 2015
    Publication date: February 1, 2018
    Applicant: Areva GMBH
    Inventors: Luis Sempere-Belda, Christian Guenther Topf
  • Patent number: 9527756
    Abstract: A process removes radioactive contamination from wastewater obtained in the decontamination of a cooling circuit of nuclear reactors or of parts thereof or in the course of operation of a nuclear reactor. A MnO2 precipitate is exclusively produced in the wastewater with the aid of permanganate ions added thereto as an oxidizing agent and of one or more organic reducing agents present in and/or metered into the wastewater, and the MnO2 precipitate is separated from the wastewater.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: December 27, 2016
    Assignee: Areva GmbH
    Inventors: Luis Sempere-Belda, Rainer Gassen, Bertram Zeiler, Jose Pedro Moreira Do Amaral
  • Publication number: 20160196889
    Abstract: The invention relates to a method for reducing the radioactive contamination of the surface of a component used in a nuclear reactor, which component is in contact with radioactively contaminated water, in which method a hydrophobic film is produced on the surface of a component by virtue of the surface being wetted with an aqueous solution which contains a film-forming amphiphilic substance.
    Type: Application
    Filed: August 8, 2014
    Publication date: July 7, 2016
    Inventors: Bernhard STELLWAG, Luis SEMPERE-BELDA, Ute RAMMINGER
  • Publication number: 20150364226
    Abstract: The invention relates to a process for the chemical decontamination of a surface, having an oxide layer of a metallic component of the coolant system of a nuclear power station, which comprises at least one oxidation step in which the oxide layer is treated with an aqueous solution containing an oxidant and a subsequent decontamination step in which the oxide layer is treated with an aqueous solution of a decont. acid which has the property of forming a sparingly soluble precipitate with metal ions, in particular with nickel ions. Prior to carrying out the decontamination step, metal ions which have gone into solution during the oxidation step are removed from the aqueous solution by means of a cation exchanger.
    Type: Application
    Filed: December 11, 2013
    Publication date: December 17, 2015
    Inventors: Luis SEMPERE BELDA, Jose Pedro MOREIRA DO AMARAL, Christian TOPF
  • Publication number: 20150008186
    Abstract: A process removes radioactive contamination from wastewater obtained in the decontamination of a cooling circuit of nuclear reactors or of parts thereof or in the course of operation of a nuclear reactor. A MnO2 precipitate is exclusively produced in the wastewater with the aid of permanganate ions added thereto as an oxidizing agent and of one or more organic reducing agents present in and/or metered into the wastewater, and the MnO2 precipitate is separated from the wastewater.
    Type: Application
    Filed: September 22, 2014
    Publication date: January 8, 2015
    Inventors: LUIS SEMPERE-BELDA, RAINER GASSEN, BERTRAM ZEILER, JOSE PEDRO MOREIRA DO AMARAL
  • Patent number: 8353990
    Abstract: A process is provided for chemically decontaminating the surface of a metallic component. In a first treatment step, an oxide layer formed on the component by corrosion of the material of the component is detached from the surface of the component with a first aqueous treatment solution containing an organic decontamination acid. In a subsequent second treatment step, the surface which is at least partially freed of the oxide layer is treated with an aqueous solution containing an active component for removing particles which adhere to the surface. The active component is formed of at least one anionic surfactant from the group including sulphonic acids, phosphonic acids, carboxylic acids and salts of those acids.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: January 15, 2013
    Assignee: Areva NP GmbH
    Inventors: Rainer Gassen, Luis Sempere Belda, Werner Schweighofer, Bertram Zeiler
  • Publication number: 20110303238
    Abstract: A process is provided for chemically decontaminating the surface of a metallic component. In a first treatment step, an oxide layer formed on the component by corrosion of the material of the component is detached from the surface of the component with a first aqueous treatment solution containing an organic decontamination acid. In a subsequent second treatment step, the surface which is at least partially freed of the oxide layer is treated with an aqueous solution containing an active component for removing particles which adhere to the surface. The active component is formed of at least one anionic surfactant from the group including sulphonic acids, phosphonic acids, carboxylic acids and salts of those acids.
    Type: Application
    Filed: August 17, 2011
    Publication date: December 15, 2011
    Applicant: AREVA NP GMBH
    Inventors: RAINER GASSEN, LUIS SEMPERE BELDA, WERNER SCHWEIGHOFER, BERTRAM ZEILER