Patents by Inventor Melissa M. Walter
Melissa M. Walter 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: 11238996Abstract: A method and a system for performing real-time, continuous, measurements of the boron concentration in the water entering a nuclear reactor coolant system. The invention utilizes knowledge of the impact that boron contained in liquid water has on the attenuation of acoustic or ultrasonic waves. This information, coupled with radiation damage resistant and high temperature operability capable transmitter and receiver equipment, provides the means to place the measurement system sensors and signal processing electronics on the reactor coolant system charging flow piping or the hot leg or cold leg of the reactor coolant loop. This will allow the reactor operator to directly monitor both the reactor coolant system boron concentration value and detect changes in the reactor coolant system boron concentration relative to a reference value as they occur.Type: GrantFiled: April 6, 2020Date of Patent: February 1, 2022Assignee: Westinghouse Electric Company LLCInventors: Michael D. Heibel, Jorge V. Carvajal, Nicola G. Arlia, Melissa M. Walter, Robert W. Flammang, Michael A. James, David M. Sumego
-
Patent number: 11011280Abstract: A system that measures the temperature distribution of the reactor coolant flowing through the hot leg or cold leg pipes by measuring the speed of sound time delay. This concept uses radiation hardened and temperature tolerant ultrasonic signal drivers based on vacuum micro-electronic technology. The system employs ultrasonic signals propagated through water, and relies on the characteristic that the speed of sound changes as the density and temperature of the water changes. Thus, a measured difference in the speed of sound in water may be directly correlated to a temperature change of the water.Type: GrantFiled: March 10, 2016Date of Patent: May 18, 2021Assignee: Westinghouse Electric Company LLCInventors: Jorge V. Carvajal, Michael D. Heibel, Nicola G. Arlia, Melissa M. Walter, Robert W. Flammang, Michael A. James, David M. Sumego
-
Publication number: 20200335234Abstract: A method and a system for performing real-time, continuous, measurements of the boron concentration in the water entering a nuclear reactor coolant system. The invention utilizes knowledge of the impact that boron contained in liquid water has on the attenuation of acoustic or ultrasonic waves. This information, coupled with radiation damage resistant and high temperature operability capable transmitter and receiver equipment, provides the means to place the measurement system sensors and signal processing electronics on the reactor coolant system charging flow piping or the hot leg or cold leg of the reactor coolant loop. This will allow the reactor operator to directly monitor both the reactor coolant system boron concentration value and detect changes in the reactor coolant system boron concentration relative to a reference value as they occur.Type: ApplicationFiled: April 6, 2020Publication date: October 22, 2020Applicant: Westinghouse Electric Company LLCInventors: Michael D. HEIBEL, Jorge V. CARVAJAL, Nicola G. ARLIA, Melissa M. WALTER, Robert W. FLAMMANG, Michael A. JAMES, David M. SUMEGO
-
Patent number: 10706977Abstract: Apparatus for amplifying low level signals within a nuclear plant's containment building, derived from the ex-core nuclear instrumentation system. The system employs vacuum micro-electronic devices in place of conventional pre-amplifier assemblies to position the pre-amplifier assemblies closer to and within the vicinity of the ex-core detector outputs.Type: GrantFiled: January 15, 2016Date of Patent: July 7, 2020Assignee: Westinghouse Electric Company LLCInventors: Michael A. James, Jorge V. Carvajal, Michael D. Heibel, Nicola G. Arlia, Robert W. Flammang, David M. Sumego, Melissa M. Walter
-
Patent number: 10020081Abstract: A pulsed sonar-based wireless rod position indication system that utilizes nuclear radiation and high temperature tolerant hardware. The pulsed sonar-based rod position indication system can precisely locate the rod position by measuring the time of flight of a transmitted signal and by using the phase and amplitude information of the same transmitted signal. Primary and secondary antenna probes located in the interior of the control rod drive rod travel housing and full hardware redundancy provide for improved accuracy. The time of flight, phase and amplitude raw signals are inputted to a wireless data transmitter capable of sending the raw signals to a receiver antenna located elsewhere inside a containment for further processing.Type: GrantFiled: January 15, 2016Date of Patent: July 10, 2018Assignee: Westinghouse Electric Company LLCInventors: Jorge V. Carvajal, Michael D. Heibel, Nicola G. Arlia, Robert W. Flammang, David M. Sumego, Michael A. James, Melissa M. Walter
-
Patent number: 9831375Abstract: A silicon carbide Schottky diode solid state radiation detector that has an electron donor layer such as platinum placed over and spaced above the Schottky contact to contribute high energy Compton and photoelectrical electrons from the platinum layer to the active region of the detector to enhance charged particle collection from incident gamma radiation.Type: GrantFiled: February 18, 2013Date of Patent: November 28, 2017Assignee: Westinghouse Electric Company LLCInventors: Michael D. Heibel, Melissa M. Walter, Robert W. Flammang
-
Publication number: 20170263342Abstract: A method and a system for performing real-time, continuous, measurements of the boron concentration in the water entering a nuclear reactor coolant system. The invention utilizes knowledge of the impact that boron contained in liquid water has on the attenuation of acoustic or ultrasonic waves. This information, coupled with radiation damage resistant and high temperature operability capable transmitter and receiver equipment, provides the means to place the measurement system sensors and signal processing electronics on the reactor coolant system charging flow piping or the hot leg or cold leg of the reactor coolant loop. This will allow the reactor operator to directly monitor both the reactor coolant system boron concentration value and detect changes in the reactor coolant system boron concentration relative to a reference value as they occur.Type: ApplicationFiled: March 10, 2016Publication date: September 14, 2017Applicant: Westinghouse Electric Company LLCInventors: Michael D. Heibel, Jorge V. Carvajal, Nicola G. Arlia, Melissa M. Walter, Robert W. Flammang, Michael A. James, David M. Sumego
-
Publication number: 20170263341Abstract: A system that measures the temperature distribution of the reactor coolant flowing through the hot leg or cold leg pipes by measuring the speed of sound time delay. This concept uses radiation hardened and temperature tolerant ultrasonic signal drivers based on vacuum micro-electronic technology. The system employs ultrasonic signals propagated through water, and relies on the characteristic that the speed of sound changes as the density and temperature of the water changes. Thus, a measured difference in the speed of sound in water may be directly correlated to a temperature change of the water.Type: ApplicationFiled: March 10, 2016Publication date: September 14, 2017Applicant: Westinghouse Electric Company LLCInventors: Jorge V. Carvajal, Michael D. Heibel, Nicola G. Arlia, Melissa M. Walter, Robert W. Flammang, Michael A. James, David M. Sumego
-
Publication number: 20170206989Abstract: Apparatus for amplifying low level signals within a nuclear plant's containment building, derived from the ex-core nuclear instrumentation system. The system employs vacuum micro-electronic devices in place of conventional pre-amplifier assemblies to position the pre-amplifier assemblies closer to and within the vicinity of the ex-core detector outputs.Type: ApplicationFiled: January 15, 2016Publication date: July 20, 2017Applicant: Westinghouse Electric Company LLCInventors: Michael A. James, Jorge V. Carvajal, Michael D. Heibel, Nicola G. Arlia, Robert W. Flammang, David M. Sumego, Melissa M. Walter
-
Publication number: 20170206990Abstract: A pulsed sonar-based wireless rod position indication system that utilizes nuclear radiation and high temperature tolerant hardware. The pulsed sonar-based rod position indication system can precisely locate the rod position by measuring the time of flight of a transmitted signal and by using the phase and amplitude information of the same transmitted signal. Primary and secondary antenna probes located in the interior of the control rod drive rod travel housing and full hardware redundancy provide for improved accuracy. The time of flight, phase and amplitude raw signals are inputted to a wireless data transmitter capable of sending the raw signals to a receiver antenna located elsewhere inside a containment for further processing.Type: ApplicationFiled: January 15, 2016Publication date: July 20, 2017Applicant: Westinghouse Electric Company LLCInventors: Jorge V. Carvajal, Michael D. Heibel, Nicola G. Arlia, Robert W. Flammang, David M. Sumego, Michael A. James, Melissa M. Walter
-
Patent number: 9664796Abstract: A method includes detecting on an ongoing basis the currently existing dose rates while a worker is performing a maintenance or other operation within the RCA, and visually outputting information that pertains to the ionizing radiation to which the worker is being exposed during the operation. The information that is visually output can include information such as the current dose rate and the overall dose to which the worker has been subjected, but can additionally include information such as the time remaining before which the worker will have been exposed to the maximum allowable dose. Furthermore, it is possible for the visual display to output visual indicia that represent a comparison the exposure to ionizing radiation that had been planned as a function of time prior to the operation being commenced with the actual exposure to ionizing radiation as the operation is performed.Type: GrantFiled: February 15, 2016Date of Patent: May 30, 2017Assignee: Westinghouse Electric Company LLCInventors: Michael S. Norrell, Joonhyung Choi, Melissa M. Walter, Sabryna D. Henze, Robert W. Flammang
-
Publication number: 20160238715Abstract: A method includes detecting on an ongoing basis the currently existing dose rates while a worker is performing a maintenance or other operation within the RCA, and visually outputting information that pertains to the ionizing radiation to which the worker is being exposed during the operation. The information that is visually output can include information such as the current dose rate and the overall dose to which the worker has been subjected, but can additionally include information such as the time remaining before which the worker will have been exposed to the maximum allowable dose. Furthermore, it is possible for the visual display to output visual indicia that represent a comparison the exposure to ionizing radiation that had been planned as a function of time prior to the operation being commenced with the actual exposure to ionizing radiation as the operation is performed.Type: ApplicationFiled: February 15, 2016Publication date: August 18, 2016Applicant: WESTINGHOUSE ELECTRIC COMPANY LLCInventors: MICHAEL S. NORRELL, JOONHYUNG CHOI, MELISSA M. WALTER, SABRYNA D. HENZE, ROBERT W. FLAMMANG
-
Publication number: 20130285068Abstract: A silicon carbide Schottky diode solid state radiation detector that has an electron donor layer such as platinum placed over and spaced above the Schottky contact to contribute high energy Compton and photoelectrical electrons from the platinum layer to the active region of the detector to enhance charged particle collection from incident gamma radiation.Type: ApplicationFiled: February 18, 2013Publication date: October 31, 2013Applicant: Westinghouse Electric Company LLCInventors: Michael D. Heibel, Melissa M. Walter, Robert W. Flammang