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Review of Progress in Quantitative Nondestructive Evaluation

Physics

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Full-Text Articles in Nuclear Engineering

Frequency Domain Reflectometry Nde For Aging Cables In Nuclear Power Plants, S. W. Glass, A. M. Jones, L. S. Fifield, T. S. Hartman Jan 2016

Frequency Domain Reflectometry Nde For Aging Cables In Nuclear Power Plants, S. W. Glass, A. M. Jones, L. S. Fifield, T. S. Hartman

Review of Progress in Quantitative Nondestructive Evaluation

Degradation of the cable jacket, electrical insulation, and other cable components of installed cables within nuclear power plants (NPPs) is known to occur as a function of age, temperature, radiation, and other environmental factors. System tests verify cable function under normal loads; however, demonstration of some cable’s ability to perform under exceptional loads associated with design-basis events is essential to assuring plant integrity. The cable’s ability to perform safely over the initial 40-year planned and licensed life has generally been demonstrated and there have been very few age-related cable failures.With greater than 1000 km of power, control ...


Numerical Calculation Of Diffraction Coefficients In Anisotropic Media, J. Temple, L. White Jan 1993

Numerical Calculation Of Diffraction Coefficients In Anisotropic Media, J. Temple, L. White

Review of Progress in Quantitative Nondestructive Evaluation

Ultrasonic inspection is used to detect and size crack-like defects in pressure vessels and pipework used in the nuclear industry. Reliable inspection can only be achieved if the inspection technique is understood, is optimised and subsequently applied correctly. Austenitic steels are used because of their corrosion resistance and toughness. Welds and centrifugally cast materials tend to crystallise with grains larger than the ultrasonic wavelength required to achieve the desired resolution in the inspection and thus appear anisotropic. Since the grains in a weld grow along the, varying, directions of maximum heat flux during cooling, the welds are inhomogeneous as well ...


Ultrasonic Beam Propagation Through A Bimetallic Weld — A Comparison For Predictions Of The Gauss-Hermite Beam Model And Finite Element Method, A. Minachi, J. Mould, R. Bruce Thompson Jan 1993

Ultrasonic Beam Propagation Through A Bimetallic Weld — A Comparison For Predictions Of The Gauss-Hermite Beam Model And Finite Element Method, A. Minachi, J. Mould, R. Bruce Thompson

Review of Progress in Quantitative Nondestructive Evaluation

To ensure safe operation, nuclear power plants must be inspected periodically. One of the most commonly used nondestructive inspection methods uses ultrasound to detect internal flaws. However, the complex structure of some joints between different components greatly complicates the ultrasonic inspection. These joints, which consist of welds with varying and sometimes anisotropic elastic properties, can distort the ultrasonic beam and produce unreliable results. To understand the propagation of elastic waves through such materials, beam models are used.