Patents by Inventor Bertram Zeiler

Bertram Zeiler 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).

  • 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: 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: 8702868
    Abstract: A method for decontaminating nuclear plant surfaces, which have been contaminated with alpha emitters, is carried out subsequently to a decontamination process which is aimed at the removal of oxide layers. The surfaces are treated with an aqueous solution which contains a cationic or zwitterionic surfactant and oxalic acid. At least a part of the solution, after having acted on a surface, is conducted across an ion exchanger.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: April 22, 2014
    Assignee: Areva GmbH
    Inventors: Rainer Gassen, Christoph Stiepani, Horst-Otto Bertholdt, Bertram Zeiler
  • Publication number: 20130220366
    Abstract: A method for chemical decontamination of an oxide-coated surface of a metal structural part or of a system in a nuclear power plant with several cleaning cycles, involves oxidation steps, in which the oxide layer is treated with an aqueous solution containing an oxidation agent, and a subsequent decontamination step, in which the oxide layer is treated with an aqueous solution of an acid. At least one oxidation step is carried out in an acid solution and at least one oxidation step in an alkaline solution.
    Type: Application
    Filed: August 23, 2012
    Publication date: August 29, 2013
    Applicant: AREVA NP GMBH
    Inventors: RAINER GASSEN, BERTRAM ZEILER
  • 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: 20120138086
    Abstract: A method chemically decontaminates a surface of a metal component of a primary circuit of a pressurized-water reactor, the surface contains an oxide layer. In a first stage, an oxidation step, a reduction step, and a first decontamination step are performed. The component is treated in the oxidation step with an aqueous solution containing an oxidizing agent, which converts trivalent chrome present in the oxide layer into hexavalent chrome. The component is treated in the reduction step with an aqueous solution containing a reducing agent for reducing excess oxidation agent from the oxidation step. The component is treated in the first decontamination step with an aqueous solution containing a decontamination acid that forms no antisoluble deposits with metal ions in the solution. The solution is fed through an ion exchanger for removing metal ions. In a second stage, the component is treated with an aqueous solution containing an oxalic acid.
    Type: Application
    Filed: February 13, 2012
    Publication date: June 7, 2012
    Applicant: AREVA NP GMBH
    Inventors: RAINER GASSEN, 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
  • Publication number: 20100116288
    Abstract: A method for decontaminating nuclear plant surfaces, which have been contaminated with alpha emitters, is carried out subsequently to a decontamination process which is aimed at the removal of oxide layers. The surfaces are treated with an aqueous solution which contains a cationic or zwitterionic surfactant and oxalic acid. At least a part of the solution, after having acted on a surface, is conducted across an ion exchanger.
    Type: Application
    Filed: May 27, 2009
    Publication date: May 13, 2010
    Applicant: AREVA NP GMBH
    Inventors: Horst-Otto Bertholdt, Rainer Gassen, Christoph Stiepani, Bertram Zeiler