Patents by Inventor Robert Douglas Varrin

Robert Douglas Varrin 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).

  • Crystal habit modifiers for nuclear power water chemistry control of fuel deposits and steam generator crud
    Patent number: 8433030
    Abstract: Crystal habit modifiers (CHM) are provided to ameliorate deposit-related concerns in nuclear plant systems. The principal targets for utilization of crystal habit modifiers are Pressure Water Reactor (PWR) primary-side fuel rod crud and secondary-side steam generator deposits and Boiling Water Reactor (BWR) coolant system deposits.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: April 30, 2013
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Keith Paul Fruzzetti, Karen Samie Kim, Robert Douglas Varrin, Jr., Charles Marks
  • Crystal Habit Modifiers for Nuclear Power Water Chemistry Control of Fuel Deposits and Steam Generator Crud
    Publication number: 20100135450
    Abstract: Crystal habit modifiers (CHM) are provided to ameliorate deposit-related concerns in nuclear plant systems. The principal targets for utilization of crystal habit modifiers are Pressure Water Reactor (PWR) primary-side fuel rod crud and secondary-side steam generator deposits and Boiling Water Reactor (BWR) coolant system deposits.
    Type: Application
    Filed: December 1, 2009
    Publication date: June 3, 2010
    Inventors: Keith Paul Fruzzetti, Karen Samie Kim, Robert Douglas Varrin, JR., Charles Marks
  • Apparatus and method for ultrasonically cleaning irradiated nuclear fuel assemblies
    Patent number: 7542539
    Abstract: An apparatus for cleaning an irradiated nuclear fuel assembly includes a housing adapted to engage a nuclear fuel assembly. A set of ultrasonic transducers is positioned on the housing to supply radially emanating omnidirectional ultrasonic energy to remove deposits from the nuclear fuel assembly.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: June 2, 2009
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Paul L. Frattini, Robert Douglas Varrin, Edwin Stephen Hunt
  • Apparatus and method for ultrasonically cleaning irradiated nuclear fuel assemblies
    Publication number: 20020163990
    Abstract: An apparatus for cleaning an irradiated nuclear fuel assembly includes a housing adapted to engage a nuclear fuel assembly. A set of ultrasonic transducers is positioned on the housing to supply radially emanating omnidirectional ultrasonic energy to remove deposits from the nuclear fuel assembly.
    Type: Application
    Filed: December 10, 2001
    Publication date: November 7, 2002
    Applicant: Electric Power Research Institute, Inc.
    Inventors: Paul L. Frattini, Robert Douglas Varrin, Edwin Stephen Hunt
  • Apparatus and method for ultrasonically cleaning irradiated nuclear fuel assemblies
    Patent number: 6396892
    Abstract: An apparatus for cleaning an irradiated nuclear fuel assembly includes a housing adapted to engage a nuclear fuel assembly. A set of ultrasonic transducers is positioned on the housing to supply radially emanating omnidirectional ultrasonic energy to remove deposits from the nuclear fuel assembly.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: May 28, 2002
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Paul L. Frattini, Robert Douglas Varrin, Edwin Stephen Hunt