The invention relates to improved systems and methods for inspecting the tubes of a steam generator of a nuclear reactor that involves modeling the steam generator, comparing signals of a tube from an eddy current sensor with aspects of the model to determine whether further analysis is required, employing primary and secondary analysis processes, and producing a combined report of the primary and secondary analysis results.

The technique relates to a system and method for assessing corroded pipeline defect growth rate from partial defect growth rate information. The method involves obtaining a plurality of observed defect growth rates from the inspection data collected at different time intervals then determining at least one unobserved defect growth rate on the basis of distribution pattern of the plurality of observed defect growth rates thereafter simulating condition of at least one hyper parameter on the inspection data based on prior information of the at least one hyper parameter then simulating the plurality of observed defect growth rates and the at least one unobserved defect growth rate based on the simulated hyper parameters and finally obtaining defect growth rate point estimate from the simulated growth rate data. The method also involves determining a probability of failure of a defect from the defect growth rate point estimates.

A mobile body corrosion measuring apparatus having a corrosion sensor installed in at least one portion of a mobile body, the corrosion sensor measuring a corrosion state at the portion and outputting corrosion data; a vehicle (mobile body) running speed sensor installed in the mobile body, the running speed sensor measuring a running speed of the mobile body and outputting the running speed data; and a data collection unit that acquires the corrosion data from the corrosion sensor and the running speed data from the vehicle speed sensor at the same time and collects the corrosion data and the running speed data with the corrosion data and the running speed data associated with each other. Due to above structure, a corrosion state specific to the mobile body can be accurately measured.

Provided is a rotating electrical machine, including: temperature information acquisition means for acquiring information on a temperature of a brush; rotation information acquisition means for acquiring information on a rotation angle of a rotation shaft; and a wear amount calculation section for acquiring the temperature of the brush based on temperature information including output information of the temperature information acquisition means, and for calculating a total wear amount of the brush by integrating a product of a value corresponding to the temperature of the brush, the value being a wear amount function defined as a wear amount per unit sliding distance of the brush with the temperature of the brush used as a variable, and a value including an rotational speed of a rotor, with respect to time from immediately after start of use of the brush to a current time.

An integrity monitoring system for monitoring integrity of at least a part of a stationary structure includes a vibration sensor for sensing vibration as a function of time, a computer, transmitting means for transmitting vibration data from the vibration sensor to the computer, means for acquiring position as a function of time data of a movable object, such as a vessel, a vehicle or a digging tool. The movable object includes a transmitter transmitting the position as a function of time data to the computer when the movable object is within a selected distance to a monitoring site. The monitoring site includes the part of the stationary structure to be monitored and the vibration sensor is arranged to sense vibrations within the monitoring site. The computer includes hardware and software for comparing the vibration data with the position as a function of time data.

Embodiments of the present disclosure provide an adjustable diameter step pin apparatus. The adjustable diameter step pin apparatus includes a body element and a head element having a thumb screw portion and a threaded portion. The body element includes a plurality of threaded finish structures. The body element may be configured to receive a collet along a longitudinal slot of the adjustable diameter step pin apparatus. The thumb screw portion may be configured to rotate to alter the collet and the threaded portion may be configured to engage with the plurality of threaded finish structures when assembled with the body element. In an embodiment, the head element may be rotatable to engage the threaded portion of the head element into the plurality of threaded finish structures to alter the collet while keeping the body element sturdy.

Embodiments of the present disclosure provide an adjustable diameter step pin apparatus. The adjustable diameter step pin apparatus includes a body element and a head element having a thumb screw portion and a threaded portion. The body element includes a plurality of threaded finish structures. The body element may be configured to receive a collet along a longitudinal slot of the adjustable diameter step pin apparatus. The thumb screw portion may be configured to rotate to alter the collet and the threaded portion may be configured to engage with the plurality of threaded finish structures when assembled with the body element. In an embodiment, the head element may be rotatable to engage the threaded portion of the head element into the plurality of threaded finish structures to alter the collet while keeping the body element sturdy.

A gauge for inspecting an aperture of a workpiece includes a body having a hole gauge portion configured to be disposed in a hole portion of the aperture and a countersink gauge portion configured to be disposed in a countersink portion of the aperture. The gauge includes a hinge connecting the hole gauge portion and the countersink gauge portion to allow the countersink gauge portion to move relative to the hole gauge portion. The gauge includes an indicator coupled to the body. The indicator is configured to indicate whether a predetermined tolerance is obtained between the countersink portion and the hole portion of the aperture. A method of determining a predetermined tolerance of an aperture of a workpiece uses the gauge.

A gauge for inspecting an aperture of a workpiece includes a body having a hole gauge portion configured to be disposed in a hole portion of the aperture and a countersink gauge portion configured to be disposed in a countersink portion of the aperture. The gauge includes a hinge connecting the hole gauge portion and the countersink gauge portion to allow the countersink gauge portion to move relative to the hole gauge portion. The gauge includes an indicator coupled to the body. The indicator is configured to indicate whether a predetermined tolerance is obtained between the countersink portion and the hole portion of the aperture. A method of determining a predetermined tolerance of an aperture of a workpiece uses the gauge.