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| Number | Title | Issue Date |
| 5140821 | Apparatus and methods for thermal protection of liquid containers Methods and apparatus are disclosed for taking advantage of a heat exchange relation between a liquid coolant and a protected liquid, whereby vaporization of the liquid coolant withdraws heat from the body of the protected liquid or an exterior heat sourc... | 08/25/1992 |
| 5007988 | Method for determining the concentration of a plurality of combustible gases in a stream A method for determining the concentration of a plurality of combustible gases in a gas stream comprises providing an electrochemical cell apparatus that includes an electrochemical cell in which a cavity is formed having a diffusion limiting port forming... | 04/16/1991 |
| 4996018 | High pressure thimble/guide tube seal fitting with built-in low pressure seal especially suitable for facilitated and more efficient nuclear reactor refueling service A HP/LP seal arrangement is provided for a guide tube and thimble extending outwardly from the core of a nuclear reactor to a seal table where the guide tube is welded to the seal table to provide a high pressure seal relative thereto. A tubular seal fitt... | 02/26/1991 |
| 4991427 | Bore mapping and surface time measurement system The present invention includes a bore mapping system that includes one or more high resolution ultrasonic mapping transducers that are used to measure the diameter of a bore. The travel time for a normally incident pulse to reach the bore surface and retu... | 02/12/1991 |
| 4991441 | Positioning assembly for a transducer in a boresonic inspection system An immersion base ultrasonic inspection system for interrogating the bore and near bore material of turbine and generator rotors by passing ultrasonic search units through the rotor bore. This system utilizes variable focus array inspection transducers in... | 02/12/1991 |
| 4983352 | Closure system for a spent fuel storage cask A closure system of a spent fuel storage cask includes a lid assembly having a shield lid which is installed under water and which cooperates in the drainage of water from the cask. A primary cover having a spring energized metalic C-ring captured therein... | 01/08/1991 |
| 4961899 | Multiple-cable connecting device for a nuclear reactor A device in a nuclear reactor for connecting a plurality of energy conveying cables to a nuclear reactor head structure comprising a pair of matching multiple cooperative connector plates for disengageably connecting an energy source with the reactor head... | 10/09/1990 |
| 4927593 | Beta ray flux measuring device A beta ray flux measuring device in an activated member in-core instrumentation system for pressurized water reactors. The device includes collector rings positioned about an axis in the reactor's pressure boundary. Activated members such as hydroballs ar... | 05/22/1990 |
| 4922194 | Process sensor simulators A circuit device for simulating a selected one of a plurality of process transducers, including: signal input and output terminals connectable to external conductors; a plurality of circuit components (90,92,94; 104,108) connectable between the signal inp... | 05/01/1990 |
| 4922233 | Flow sensor and system incorporating the same for monitoring steam turbine drain valves A flow sensor includes a strap-on heater attached to a fluid conduit downstream of a drain valve and two differential temperature measuring thermocouples attached to the fluid conduit downstream of the heater. A monitoring system employing at least one of... | 05/01/1990 |
| 4912446 | High energy density hyperconducting inductor A cryogenically coolable inductive coil including: a multicomponent conductor comprising a plurality of components, each component including a cable of conductive material having a longitudinal axis about which the cable is twisted, the cable being wrappe... | 03/27/1990 |
| 4908775 | Cycle monitoring method and apparatus The present invention is a cycle monitoring system and method that acquires, logs and analyzes analog and/or digital signals from component sensors in a process control plant such as a nuclear power plant. The system continuously monitors the sensors and ... | 03/13/1990 |
| 4907456 | Sensor probe system This invention relates to a method for measuring vibration in turbine blades and to an apparatus for mounting a sensing device for monitoring blade tip vibration in turbo-machinery. A guide tube is mounted through the cylinder covers of a turbine and exte... | 03/13/1990 |
| 4901061 | Instrumentation and monitoring systems employing differential temperature sensors Instrumentation and monitoring systems utilize, as differential temperature sensors, heated, split-well thermowells of duplex design, mounted to the sidewall of a pressure vessel and communicating through a penetration in the sidewall with the fluid state... | 02/13/1990 |
| 4876061 | Resiliently loaded lateral supports for cantilever-mounted rod guides of a pressurized water reactor A pressurized water reactor of an advanced design comprises, in vertically spaced relationship, a lower barrel assembly having lower and upper core plates, an inner barrel assembly and an axially removable calandria assembly having a lower calandria plate... | 10/24/1989 |
| 4875043 | Bi-directional keyboard interface circuit The present invention includes a keyboard encoder which encodes a key selected by an operator. The encoder is isolated from a bi-directional bus by an isolation circuit. When a key has been selected a key code is made available for reading by a separate C... | 10/17/1989 |
| 4864862 | Boresonic inspection system An immersion based ultrasonic inspection system is disclosed which is used to interrogate the bore and near bore material of turbine and generator rotors by passing ultrasonic search units through the rotor bore. This system utilizes variable focus array ... | 09/12/1989 |
| 4863678 | Rod cluster having improved vane configuration A spider assembly for supporting a corresponding rod cluster in a pressurized water reactor vessel, through which the core outlet flow passes in a predetermined direction. Each spider assembly comprises a generally cylindrical, central hub disposed in par... | 09/05/1989 |
| 4864569 | Software verification and validation configuration management system Differences between both the code and documentation of a revised generation of software and a previous generation are compared by a digital computer with the intended revisions stored in a release file. When all discrepancies have been eliminated, and for... | 09/05/1989 |
| 4859076 | Differential temperature sensors A heated, split thermowell comprises a cylindrical shank and integral, axially extending, part-cylindrical probes spaced by at least a first gap defined by a bilateral plane. The thermowell is mounted to the sidewall of a pressure vessel for communicating... | 08/22/1989 |
| 4857264 | Frictionally loaded top end supports for cantilever-mounted rod guides of a pressurized water reactor A pressurized water reactor of an advanced design comprises, in vertically spaced relationship, a lower barrel assembly having lower and upper core plates, an inner barrel assembly and an axially removable calandria assembly having a lower calandria plate... | 08/15/1989 |
| 4857259 | Neutron dosimeter A neutron dosimeter and a method for neutron dosimetry involving a two-layer structure, one layer being a fissile material, and the other being a material which changes its conductivity in accordance with a density of implanted ions. Neutrons striking the... | 08/15/1989 |
| 4853577 | Semi-rigid spacer for diamond area of dynamoelectric machine A filler material for supporting the coil end portions at the diamond area of a dynamoelectric machine comprises a resin filler disposed in the vent areas defined between opposed sides of spaced coil end portions at the diamond area, and an elongated, tra... | 08/01/1989 |
| 4849690 | Detection of transposition group short circuits in machine windings A method for nondestructively electronically detecting a short circuit in a conductor system which is composed of two parallel inductor groups connected together to form a selected current path when no short circuit exists, by the steps of: disposing a cu... | 07/18/1989 |
| 4842539 | Strand-to-strand short circuit tester A plurality of connector members are provided, each of which is shaped to fit between two adjacent strands in a column of strands on a stator winding (i.e., by manual insertion). Each connector member has a first side provided with an electrically conduct... | 06/27/1989 |
| 4839137 | Nuclear steam supply system and method of installation A method of providing a nuclear steam supply system that is constructed to include a barge or flotation base as an integrated portion thereof. The system is tested for operability and safety at the factory and then towed along navigable coastal or inland ... | 06/13/1989 |
| 4836974 | Variable linear motion cycle monitoring device A device for measuring cycles of random reciprocal motion of an object, such as a control valve which moves in discrete movements of varying length between an opened and closed position, includes a cylindrical travel translator member biased within a hous... | 06/06/1989 |
| 4833931 | Thermally self-adjusting mount for proximity sensor A thermally self-adjusting mount for a proximity sensor for detecting movement of a turbine blade tip within a turbine housing includes an elongated chamber in an interior wall of the turbine housing adjacent the path of travel of the turbine blade tip. T... | 05/30/1989 |
| 4832899 | Mechanical spectral shift reactor The mechanical spectral shift reactor comprises a reactive core having fuel assemblies accommodating both water displacer elements and control rods for selectively changing the volume of water-moderator in the core. The fuel assemblies are arranged in alt... | 05/23/1989 |
| 4832900 | Test tool for a reactor vessel fluid level instrumentation A test tool for a reactor vessel level instrumentation system which simulates and verifies the values of input signals applied to the instrumentation system. The test tool includes potentiometers for simulating the signals produced by resistance temperatu... | 05/23/1989 |
| 4822744 | System and method for detecting contaminants in a steam power generating system Method for monitoring changes in contaminant concentration levels between a feedwater inlet and a steam outlet in a steam generating system and system for detecting sources of contaminants in a steam generating system. The method includes a reliable means... | 04/18/1989 |
| 4816210 | Passive filtered containment vent Apparatus for the controlled venting of gases from the containment housing of a chemical or nuclear reactor. The vent path is configured as a manometer filled with a low melting point metal. Gases passing through the manometer are exhausted to a tank of s... | 03/28/1989 |
| 4816208 | Alarm management system A hybrid parallel/serial alarm management system in which sensor signals are intelligently processed to produce abnormality indication signals. The abnormality indication signals are divided into groups defined by functions of the system being monitored a... | 03/28/1989 |
| 4815014 | Machine assisted execution of process operating procedures A computer based system aids an operator in proceeding step-by-step through procedures for a complex process facility. At each step, monitored plant parameter values are used to evaluate relevant plant status and recommend action to be taken. The status a... | 03/21/1989 |
| 4810972 | Automatic short circuit tester control device A method and apparatus for testing the insulation between a conductor and ground by means of a device having two input terminals for measuring the resistance between the conductor and ground, by: connecting one terminal of the device to ground; testing th... | 03/07/1989 |
| 4808873 | Support arrangement including spacer elements for diamond area of dynamoelectric machine A filler material for supporting the coil end portions at the diamond area of a dynamoelectric machine consists of a resin filler disposed in the vent areas between adjacent coil end portions and a plurality of spacer blocks disposed in the filler. The sp... | 02/28/1989 |
| 4808271 | Electroplating method for producing ultralow-mass fissionable deposits A method for producing ultralow-mass fissionable deposits for nuclear reactor dosimetry is described, including the steps of holding a radioactive parent until the radioactive parent reaches secular equilibrium with a daughter isotope, chemically separati... | 02/28/1989 |
| 4808063 | Robot system employing force/position control In a robotic assembly system including a robotic device composed of a base member, a plurality of movable members and joint mechanisms coupling the members in a sequence extending from the base member such that a first one of the movable members is suppor... | 02/28/1989 |
| 4806807 | Method and apparatus for bolted series/phase generator connections In an electrical generator, a connector for connecting stator coil sections and the method of making that connection, each coil section ending in a header cap of a predetermined geometry, and the connector being provided with openings of complementary geo... | 02/21/1989 |
| 4804515 | Distributed microprocessor based sensor signal processing system for a complex process Signals from redundant sensors located throughout a pressurized water reactor (PWR) nuclear power plant are processed in four independent channel sets each of which includes a plurality of independent microcomputers which calibrate, convert to engineering... | 02/14/1989 |
