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7633531 Systems and methods for quantitatively assessing the quality of an image produced by an imaging system  
Methods and systems for quantitative image quality assessment of an imaging system, such as an in vessel visual inspection system, having a target, an image capture device and a computer. The...
7587942 Ultrasonic inspection crawler and method for inspecting welds of jet pumps in a nuclear reactor vessel  
An inspection assembly adapted to traverse an inspection surface, the assembly includes: a crawler body including a first side and a bottom side, wherein the first side is adapted to face a first...
7561976 Method and system for monitoring the performance of a pipe containing a pressurised fluid  
A method and system for monitoring the performance of a pipe containing a pressurised fluid. The pipe is made up of at least one current zone and singular zones. A predetermined number of singular...
7512207 Apparatus for delivering a tool into a submerged bore  
An apparatus for delivering a tool into a nuclear reactor jet pump submerged in a reactor pool includes a frame, and a propulsion unit for controlling the movement of the tool delivery apparatus...
7231331 Method and system to detect stress corrosion cracking in pipeline systems  
A method for predicting the location of stress corrosion cracking in a steel gas pipeline in which in-line stress corrosion cracking smart tool data, external low level metal loss data and soil...
7218101 Eddy current method of inspecting a pressure vessel shell  
A pressure vessel penetration sidewall adjacent a tube installed in the penetration by a clearance fit is inspected by passing an eddy current probe having a pair of circumferential coils through...
7201055 Ultrasonic miniature air gap inspection crawler  
A miniature air gap inspection crawler. The miniature air gap inspection crawler may include a base, a linear drive mechanism and a circumferential drive mechanism such that either the linear drive...
7191108 Structured approach for risk-informing deterministic safety analyses  
A risk-informed method for safety analyses of nuclear power generating systems is provided. In an exemplary embodiment, the method includes ordering events by an initiating event frequency,...
7134352 Method and apparatus for examining obstructed welds  
A method and apparatus is provided for inspecting material arranged within an annular recess such as weld beads, particularly weld beads between the shroud, core plate and support structures within...
7092477 BWR inspection manipulator  
A reactor service manipulator delivery system supported on a remotely operated trolley that travels on top of a track attached to the steam dam of a BWR shroud. The trolley has a mast and pulley...
6856662 Remote examination of reactor nozzle J-groove welds  
A combined laser and infra red sensing camera is located beneath the reactor head in the vicinity of the closure head tube welds by manipulating known robotic device handling the laser which is...
6665364 Inspection method and apparatus for piping  
Nuclear fuels are taken from a nuclear reactor pressure vessel, a rail for running is mounted under the reactor pressure vessel drain piping in parallel with a horizontal portion of the reactor...
6639962 Preventive maintenance method and apparatus of a structural member in a reactor pressure vessel  
A preventive maintenance method and apparatus for a structural member in a reactor pressure vessel according to the present invention reduce a tensile residual stress on a surface of the structural...
6625244 Inspection apparatus for examining jet pump beams in nuclear reactors  
An inspection apparatus for inspecting jet pump beams of nuclear reactors is provided. The inspection apparatus includes a base straddlingly mountable on a jet pump beam. The base includes a beam...
6536283 Assemblies and methods for inspecting piping of a nuclear reactor  
Automated inspection assemblies for scanning pipes of a nuclear reactor are described. In one embodiment, the assembly includes a mounting subassembly and a scanning subassembly. The mounting...
6526114 Remote automated nuclear reactor jet pump diffuser inspection tool  
An inspection apparatus for inspecting welds in a nuclear reactor jet pump includes a probe subassembly rotatably and linearly movably coupled to a frame structure configured to attach to a top...
6519991 Water jet peening apparatus  
A water jet peening apparatus which can carry out an efficient peening work on a large-diameter cylindrical structure by injecting a jet stream which contains air bubbles caused by cavitation at a...
6478948 Method of monitoring and controlling corrosion of furnace boiler tubes  
A method for monitoring and reducing corrosion in furnace boiler tubes measures electrochemical noise associated with corrosion mechanisms while corrosion is occurring at the surface of the tubes...
6459748 Floating ultrasonic testing end effector for a robotic arm  
An end effector for supporting an ultrasonic testing probe on a robot arm having a robot mounting bracket for use in a nuclear reactor pressure vessel. The end effector has a wrist assembly with a...
6449326 Apparatus and method for ultrasonically examining remotely located welds in cast stainless steel nuclear steam supply systems  
An apparatus for ultrasonically examining a weld in a nuclear steam supply system includes an elongated guide rod for positioning within a pipe of the nuclear steam supply system. An ultrasonic...
6440297 System and method for determining noble metal concentrations in reactor coolant streams  
A system and method for determining a noble metal concentration in a sample that is representative of a noble metal concentration in either a volume of water circulated through a nuclear reactor or...
6345081 Method and a device for evaluating the integrity of the nuclear fuel in a nuclear plant  
The invention concerns a method and a device for evaluating the integrity of the nuclear fuel in a nuclear plant having a reactor ( 1 ) enclosing a reactor core formed by a number of fuel cladding...
6332011 Ultrasonic examination of shroud weld from top of shroud flange ring  
A method of inspecting the H1 weld between the shroud head flange and the upper shroud section utilizing ultrasonic scanning includes the steps of positioning a phased array ultrasonic probe on a...
6263037 Cutting zone for radioactive materials  
An enclosed cutting zone for use in a nuclear power plant. The cutting zone includes a cutting zone barrier and a transfer zone. The cutting zone includes a movable submergible upper rig, an upper...
6240153 Reactor stud cleaning booth  
A reactor stud cleaning apparatus is presented for cleaning studs, nuts, and washers used to secure reactor heads on nuclear reactors. The cleaning apparatus is a self-contained unit having a...
6240155 Preventive maintenance apparatus for structural members in a nuclear pressure vessel  
A method of performing maintenance on a structural member inside a reactor pressure vessel includes lowering an annular guide rail having a second lug until the guide rail rests on an upper flange...
6222897 Wrist raster scan methods  
Scan methods of inspecting piping and welds of a pipe elbow in a reactor pressure vessel of a boiling water reactor are disclosed. The scan apparatus includes a motor connected to a scan head...
6219399 Maintenance method in nuclear power plant  
A maintenance of a suppression pool or spent fuel storage pool in a reactor primary containment vessel of a nuclear power plant includes a cleaning step of a water in the suppression pool and a...
6182932 Flexi-rail assembly  
A flexi-rail assembly for supporting and positioning tools for inspecting a nuclear power plant steam generator. The flexi-rail assembly includes a housing; at least one lock assembly carried by...
6169776 Methods and apparatus for examining a nuclear reactor shroud  
Methods and apparatus for examining a nuclear reactor shroud are described. In one embodiment the inspection apparatus includes a drive system, a mast subassembly, and a scanner subassembly. The...
6145583 Inspection device  
A device for inspecting the interior of steam generators capable of visually inspecting interior of tubes in steam generators, including upper portions steam generator tubes, tops and bottoms of...
6104772 Method and apparatus for introducing a self-propelled in-pipe manipulator into a pipeline  
A method and an apparatus introduce a self-propelled in-pipe manipulator into the interior of a pipeline. A hollow body receives the in-pipe manipulator, is open at least at one end surface and is...
6099718 Method and device for checking and characteristics of a surface layer of a zirconium-alloy element and use for the checking of fuel rods for a nuclear reactor  
A sinusoidal voltage is appied to a zirconium alloy clad fuel rod. The current is measured and the impedance is determined to provide a check for the compactness and adhesion of an oxide surface...
6064708 Underwater inspection/repair apparatus  
An underwater inspection/repair apparatus comprises a sealing device provided around an opening portion of a watertight vessel, a pushing mechanism provided to the watertight vessel, a water...
5930316 Shroud support ultrasonic examination apparatus  
Methods and apparatus for examining a nuclear reactor shroud are described. In one embodiment the inspection apparatus includes an elongate tubular upper section, an elongate middle section, an...
5912934 Underwater inspection system for nuclear power facilities  
A nuclear fuel identification system for use in nuclear power plants has an imaging system having a video camera and an array of illuminators surrounding the video camera and positioned to shine...
5896432 Brazeless electrochemical corrosion potential sensor  
An electrochemical corrosion potential sensor is fabricated by initially joining an electrical conductor to a sensor tip. An electrical cable is joined to the tip conductor. Ceramic powder is fused...
5878099 Apparatus for performing work in a nuclear reactor  
Methods and apparatus for enabling repeatable positioning of inspection and other service tools on an inner diameter of a shroud wall between a top guide and core plate in a boiling water nuclear...
5867547 Coolant pipe blocking device for use in a nuclear power plant  
A coolant pipe blocking device for use in a nuclear power plant is provided to temporarily choke up a coolant inlet pipe to thereby inhibit fluid communication between a reactor and a steam...
5864595 Actuator for facilitating performance of work in a nuclear reactor  
An actuator for performing work in a nuclear reactor is described. In one embodiment, the actuator includes an x-axis linear slide assembly, a y-axis linear slide assembly, and a z-axis linear...
5848113 Coated electrochemical corrosion potential sensor  
An electrochemical corrosion potential sensor includes a sensor tip electrically joined to a conductor, and a ceramic insulator joined to the tip around the conductor. A sleeve is joined to the...
5844956 Apparatus and method for inspecting an outer jacket of a core containment in the region of a heat shield surrounding the core containment  
An apparatus and a method for inspecting an outer jacket of a core containment in the vicinity of a heat shield surrounding the core containment, include an annular rail to be fixed to the core...
5838752 Apparatus and method for carrying out workings at reactor bottom  
At a reactor bottom, varieties of work are performed by a working apparatus, the work includes inspecting, cleaning and recovering radioactive corrosion products and other foreign matters deposited...
5835547 Method and apparatus for inspecting the rods of a nuclear reactor control cluster  
The apparatus for inspecting the rods of a cluster insertable in the core of a nuclear reactor comprises a body provided with sliding guide means for rods in m different orientations of the...
5809099 Laser-guided underwater wall climbing robot for reactor pressure vessel inspection  
An apparatus for inspection of a reactor pressure vessel uses a laser driven type underwater wall climbing robot guided by a laser pointer. The inspection apparatus uses a small and light...
5793203 Measurement system with noise reduction circuit  
A measurement system for measuring material deterioration in accordance with a magnetic field of the material in the presence of radiation. The measurement system includes a detection circuit which...
5787137 Methods and apparatus for performing repairs and inspections in a reactor pressure vessel of a nuclear reactor  
Methods and apparatus for performing repairs and inspections in a reactor pressure vessel (RPV) of a nuclear reactor are described. In one embodiment of the apparatus, a support mast facilitates...
5784425 Apparatus for inspecting a boiling water reactor core shroud  
An inspection apparatus is suspended from a robotic positioning arm and is operable to inspect the surface of a boiling water reactor core shroud. The apparatus includes an attachment bracket...
5781602 PGNAA system for non-invasively inspecting RPV weld metal in situ, to determine the presence and amount of trace embrittlement-enhancing element  
Prompt Gamma Neuteon Activation Analysis (PGNAA) is employed to determined in situ the content of nickel, copper, or other embrittlement-enhancing elements within the weld metal joints of nuclear...
5767410 Lamb wave ultrasonic probe for crack detection and measurement in thin-walled tubing  
A probe inspects steam generator tubing for defects. The probe includes a transducer which generates a localized ultrasonic Lamb wave. The ultrasonic wave is transferred to the tubing by a coupling...
Matches 1 - 50 out of 291 1 2 3 4 5 6 >