Patents by Inventor David W. Rackiewicz

David W. Rackiewicz 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).

  • Internal Mechanical Stress Improvement Method for Mitigating Stress Corrosion Cracking in Weld Areas of Nuclear Power Plant Piping
    Publication number: 20200055106
    Abstract: Method for mitigating stress corrosion cracking at an internal (i.e., wetted-side) weld area in piping of a nuclear power plant includes the steps of actuating a radially movable tool to produce a radial bad against the internal (i.e., normally wetted) surfaces at or near the weld area to create a deep residual compressive stress state at the wetted surface of the weld. The method permits post-process verification by physical measurements of surface distortion.
    Type: Application
    Filed: May 16, 2019
    Publication date: February 20, 2020
    Applicant: MPR Associates, Inc.
    Inventors: James E Nestell, David W. Rackiewicz, Alan C Kepple
  • Internal Mechanical Stress Improvement Method for Mitigating Stress Corrosion Cracking in Weld Areas of Nuclear Power Plant Piping
    Publication number: 20160030990
    Abstract: Method for mitigating stress corrosion cracking at an internal (i.e., welled-side) weld area in piping of a nuclear power plant includes the steps of actuating a radially movable tool to produce a radial bad against the internal (i.e., normally wetted) surfaces at or near the weld area to create a deep residual compressive stress state at the wetted surface of the weld. The method permits post-process verification by physical measurements of surface distortion.
    Type: Application
    Filed: February 13, 2015
    Publication date: February 4, 2016
    Inventors: James E. Nestell, David W. Rackiewicz, Alan C. Kepple
  • Internal Mechanical Stress Improvement Method for Mitigating Stress Corrosion Cracking in Weld Areas of Nuclear Power Plant Piping
    Publication number: 20150013425
    Abstract: Method for mitigating stress corrosion cracking at an internal (i.e., wetted-side) weld area in piping of a nuclear power plant includes the steps of actuating a radially movable tool to produce a radial load against the internal (i.e., normally wetted) surfaces at or near the weld area to create a deep residual compressive stress state at the wetted surface of the weld. The method permits post-process verification by physical measurements of surface distortion.
    Type: Application
    Filed: July 15, 2013
    Publication date: January 15, 2015
    Inventors: James E. Nestell, David W. Rackiewicz, Alan C. Kepple