Patents by Inventor Thomas Rostvall

Thomas Rostvall 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).

  • Method of controlling pressure in a fuel rod
    Patent number: 10692610
    Abstract: A method and a system includes controlling and monitoring the gas pressure in a nuclear fuel rod during filling of the fuel rod with a gas, and subsequent sealing of the fuel rod. The system includes a control unit and a length measuring system, which control unit is communicatively connected to the length measuring system. The length measuring system is configured to monitor the length of the fuel rod, and the control unit is configured to receive measurements from the length measuring system and to determine the gas pressure inside the fuel rod on the basis of variations of the length of the fuel rod. The method includes positioning an open first end of the fuel rod inside a pressure chamber, allowing gas to enter the fuel rod; pressurizing the gas in the pressure chamber at a first pressure level; closing the fuel rod; and sealing the fuel rod.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: June 23, 2020
    Assignee: Westinghouse Electric Sweden AB
    Inventors: Thomas Rostvall, Pontus Löf Helmersson
  • METHOD OF CONTROLLING PRESSURE IN A FUEL ROD
    Publication number: 20180082758
    Abstract: A method and a system includes controlling and monitoring the gas pressure in a nuclear fuel rod during filling of the fuel rod with a gas, and subsequent sealing of the fuel rod. The system includes a control unit and a length measuring system, which control unit is communicatively connected to the length measuring system. The length measuring system is configured to monitor the length of the fuel rod, and the control unit is configured to receive measurements from the length measuring system and to determine the gas pressure inside the fuel rod on the basis of variations of the length of the fuel rod. The method includes positioning an open first end of the fuel rod inside a pressure chamber, allowing gas to enter the fuel rod; pressurizing the gas in the pressure chamber at a first pressure level; closing the fuel rod; and sealing the fuel rod.
    Type: Application
    Filed: March 23, 2016
    Publication date: March 22, 2018
    Applicant: Westinghouse Electric Sweden AB
    Inventors: Thomas Rostvall, Pontus Löf Helmersson