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4453501 |
Transducer for determining if steam generator tubes are locked in at support plate
A nuclear steam generator including a vessel, means to introduce vaporizable fluid into the bottom portion of the vessel, an outlet near the top through which vapor is discharged, a horizontal tube...
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4448680 |
Apparatus and method for classifying fuel pellets for nuclear reactor
Control for the operation of a mechanical handling and gauging system for nuclear fuel pellets. The pellets are inspected for diameters, lengths, surface flaws and weights in successive stations....
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4447388 |
Bolt failure detection
Bolts of a liquid metal fast breeder reactor, each bolt provided with an internal chamber filled with a specific, unique radioactive tag gas. Detection of the tag gas is indicative of a crack in an...
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4438649 |
Apparatus for remotely positioning sensing devices in a reactor during operation thereof
An apparatus for remotely positioning sensing devices within a reactor. The apparatus comprises a pressure-tight housing located adjacent to the reactor wherein the housing has a port connected by...
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4426888 |
Apparatus for sampling material from a remote location
A system for sampling material from a remote location which selectively collects a predetermined quantity of material in a valve disposed inside a container. This measured amount of material is...
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4425296 |
Probe-holding apparatus for holding a probe for checking steam generator tubes particularly in a nuclear reactor installation
Probe-holding apparatus for holding a probe for checking steam generator tubes particularly in a nuclear reactor installation. The apparatus comprises a telescopic arm supported via a ball and...
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4424187 |
Apparatus for the monitoring of the passsage of conductive objects through a tube
An apparatus for detecting or otherwise monitoring, e.g. counting, each passage of a succession of conductive objects (especially graphite-sheathed ball-shaped nuclear fuel or breeder elements for...
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4421715 |
Baffle maintenance apparatus
The baffle maintenance apparatus comprises a peening apparatus mounted on a movable carriage for reducing the width of a gap between two adjacent baffle plates in a nuclear reactor. The peening...
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4420456 |
Mounting of power conductor and instrument lead penetrations for nuclear reactor installations
A mounting for power conductor and instrument lead penetrations in nuclear reactors provides a device that is simple, compact and at the same time easily installed, repaired or replaced. The...
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4420455 |
End plug gauging device and method
An amphibious end plug gauging device and method for determining the axial location of nuclear fuel element end plugs within or without the upper tie plate of a fuel bundle. The gauging device is...
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4415524 |
Apparatus for and method of monitoring for breached fuel elements
This invention teaches improved apparatus for the method of detecting a breach in cladded fuel used in a nuclear reactor. The detector apparatus uses a separate bypass loop for conveying part of...
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4405430 |
Remotely operable sample-taking appliance, especially for ascertaining radio activity profiles in contaminated material surfaces
A sample-taking appliance comprises several sensors (61, 62, 63, 64) arranged on a turntable like sensor carrier (50) in such a manner that the application areas (68) of the small sensor sponges...
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4402903 |
Control system for coupling redundant logic channels
A control system for coupling redundant logic channels while maintaining electrical and physical isolation between channels. The separate redundant logic channels each include an electro-optic...
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4394895 |
Facilities for the examination of radioactive bodies
A facility for the examination of radioactive bodies in which carriages, each transporting one or more radioactive bodies, travel along a shielded passage to bring the bodies to examination...
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4394345 |
Ultrasonic method and apparatus
An ultrasonic transducer apparatus and method for examining nuclear reactor jet pump beams for cracking. Examination is conducted in situ. An operator lowers a carriage portion of the apparatus...
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4392214 |
Sound-monitoring device for an industrial installation
Sound monitoring device for an industrial installation to detect possible impacts of stray bodies including at least one set of two sound detectors arranged in contact with the wall of the...
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4390496 |
Gaging device
An in-basin measuring system for determining changes in the longitudinal profile of nuclear fuel channel members which have been subjected to radiation in the reactor core section while maintaining...
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4389894 |
Cylindrical guide rail for detector
An ultrasonic flaw detector is guided around a cylindrical pipe to be inspected by a cylindrical guide rail which is in the form of a split circular ring with a latch and a hinge. On the inner...
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4384489 |
Method of monitoring stored nuclear fuel elements
To monitor a nuclear fuel element or fuel elements located in a store, e.g. a pond in a swimming pool reactor, the store is illuminated ultrasonically using one or more transducers transmitting...
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4380527 |
Standard fission product emission device for detecting failed fuel elements in a nuclear reactor
The present invention relates to a standard fission product emission device, for detecting failed fuel elements in a nuclear reactor of the type cooled by pressurized water, said reactor comprising...
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4377550 |
High temperature liquid level sensor
A length of metal sheathed metal oxide cable is perforated to permit liquid access to the insulation about a pair of conductors spaced close to one another. Changes in resistance across the...
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4363778 |
Monitor circuit for a control rod drive mechanism
A monitor circuit for a control rod drive mechanism (CRDM) that is adapted to detect erroneous stator phase sequences and generate a visible and audible alarm. The monitor circuit has particular...
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4359903 |
System for the identification of objects, for example nuclear fuel elements
A system, suitable for use as an identity seal for an object, such as a container for fissile material, comprises a body including a cap for fitting over one end of the object, and a recess which...
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4352065 |
Nondestructive electromagnetic inspection of pipelines incorporated in an electrically closed loop
The method according to the invention comprises producing an alternating magnetic flux coupled to an electrically closed loop which includes a pipeline to be checked, and measuring at least on...
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4349112 |
Pellet inspection apparatus
Apparatus for inspecting nuclear fuel pellets in a sealed container for diameter, flaws, length and weight. The apparatus includes, in an array, a pellet pick-up station, four pellet inspection...
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4348909 |
Sampling probe for taking partial liquid quantities from various phases of two immiscible liquids
A sampling probe for sampling partial quantities of liquid in a counter-current extraction column wherein the liquid has first and second immiscible phases moving in mutually opposite directions....
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4347622 |
Signature surveillance of nuclear fuel
Typical nuclear fuel material contains tramp ferromagnetic particles of random size and distribution. Also, selected amounts of paramagnetic or ferromagnetic material can be added at random or at...
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4343186 |
Vibration pickup
Device for performing vibration measurement of parts, having at least one measuring instrument making contact with a measuring point under spring load, and a manipulating device operatively...
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4339410 |
Control for liquid plant
A temperature control system for liquid plant is comprised of liquid metal, plant members, heaters for heating these liquid metal and the plant members at respective control points, a temperature...
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4336103 |
Method of repairing partly burnt-off fuel elements in the fuel-element pit pressurized water reactors and device therefor
A method of repairing partly burnt-off fuel elements in a fuel-element pit of a pressurized-water reactor which includes placing a fuel element previously detected as being defective into a holding...
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4330367 |
System and process for the control of a nuclear power system
A protective control system and method for a nuclear steam supply system for the protection against the violation of safety design limits, the system comprising the combination of two sub-systems....
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4328071 |
Device for guiding ducts which extend through a rotatable component
Tubes or cables designated as ducts and extending through a movable component which is capable of rotational motion about a vertical axis are supported between a fixed point located externally of...
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4324616 |
Detachable and leaktight device for closing an orifice of a nuclear reactor vessel
A detachable and leaktight device for closing an orifice of a nuclear reactor vessel during hydraulic pressure testing comprises a body which bears, inside the vessel, on an internal part of the...
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4319959 |
Method of supervising the channel stability in reactor cores of nuclear reactors
In supervising the channel stability of a nuclear reactor, the thermal power and the coolant flow quantity in each fuel assembly are determined by signals produced by a plurality of neutron flux...
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4314881 |
Reactor control rod timing system
A fluid driven jet-edge whistle timing system for control rods of a nuclear reactor for producing real-time detection of the timing of each control rod in its scram operation. An important...
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4313793 |
Machine for removing in-core instrument assemblies from a nuclear reactor
A machine for smoothly and controllably winding or unwinding a stiff in-core-instrument tube onto and off of a reel during ythe refueling of a nuclear reactor. The machine includes a frame (33) and...
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4304629 |
Object impact discriminator
A system for discriminating between hard object impact detected by a transducer and background noise or electrical noise spikes, which uses the detection of a series of cross-over points during a...
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4298054 |
Method of withdrawing a mobile sensor from a heat exchanger
A method of withdrawing a mobile inspection sensor assembly from the lower header of a vertical tubular heat-exchanger includes the steps of introducing into a guide tube of the assembly and into a...
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4288290 |
Apparatus for exchanging control rod drive mechanism in a nuclear reactor
In apparatus for exchanging a control rod drive mechanism of a nuclear reactor of the type comprising a horizontal platform supported to be rotatable in a working chamber disposed below a reactor...
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4284473 |
Submerged ultrasonic viewer for a nuclear reactor
A submerged ultrasonic viewer for use in a liquid metal cooled fast reactor vessel to detect floated reactor core components. The viewer, which includes an ultrasonic transducer, a transducer...
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4278051 |
Method of preventing recirculation pump cavitation and forced recirculation pump type steam-generating apparatus using the method
A method of preventing a recirculation pump cavitation and a forced recirculation type steam-generating apparatus are disclosed in which water is forcibly circulated by a recirculation pump. The...
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4277680 |
Neutron poison test device for high density spent fuel storage racks
A neutron poison test device for verifying that high density spent nuclear fuel racks contain neutron poison (a substance that absorbs neutrons without inducing a nuclear fission which produces...
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4274280 |
Plugging indicator
A plugging indicator comprises an economizer having concentric outer and inner pipes one ends of which are connected to a main conduit through which liquid metal passes, an electromagnetic pump...
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4274205 |
Measuring fixture
An accurately formed straight edge member serves as a track for a carriage movable along the length of an elongated component. Distance measuring devices supported by the carriage engage the...
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4255972 |
Device for the inspection of welds
Device for the inspection of a weld joint between a tubular stub and a wall, whereby a test probe is carrying out a rotational as well as a translational movement with respect to the stub, so that...
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4253914 |
Feeding device
Device for insertion and withdrawal of an electrically connected instrument in a deep channel, comprising a flexible cable-like member, one end of said member to be inserted being connected to the...
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4246783 |
Spring-force measuring device
Device for measuring the spring-force of resilient spacer projections set into spacer grids of nuclear reactor fuel assemblies to push fuel rods surrounded by spacer meshes against at least two...
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4244296 |
Self-propelled vehicle
Self-propelled vehicle with articulated arms able to move in a tube or in a laminar space defined between two approximately parallel surfaces. It comprises a body equipped with at least one driving...
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4232224 |
Nuclear reactor primary coolant loop flowmeter with phase shift tracking compensation
An improved nuclear reactor primary loop flowmeter having two spaced N-16 detectors (12 and 14) positioned along the primary loop piping for monitoring the N-16 activity within the coolant at the...
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4227081 |
Method of evaluating the integrity of the outer carbon layer of triso-coated reactor fuel particles
This invention relates to a method for determining defective final layers of carbon on triso-coated fuel particles and the like. Samples of the particles are subjected to a high temperature...
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