Application of CdZnTe Gamma-Ray Detector for Imaging Corrosion under Insulation

Applications of Cd(Zn)Te Radiation Detectors in Non-Destructive Testing and Evaluation

“…The detection of corrosion under insulation in steel pipes were investigated with a radiography based Pipe Corrosion Under Insulation (CUI) profiler [ 80 ]. Aluminum and steel pipes with fiberglass/calcium silicate insulation were inspected with a dual-beam gamma-ray absorption technique utilizing two CZT detectors.…”

“…Insulation thicknesses of 25, 40, and 50 mm were inspected along with pipe internal diameters ranging from 50 mm to 150 mm. Two 100 mCi Am-141 sources were collimated and coupled with two separate CZT detectors with a crystal volume of 20 × 20 × each [ 80 ]. The instrument effectively measures changes in the apparent diameter due to the placement of the two detectors on diametrically opposing surfaces of the pipe.…”

“…The observed changes in count rates would signal an internal diameter change. The device reported diameter deviations every second up to 0.1 mm accuracy, and the lateral scan speed was approximately 6 m per minute [ 80 ]. The carriage that housed the source and detectors to the pipe weighed approximately 5 kg and operated on batteries with an approximate battery life of 100 operating hours.…”

“…The carriage that housed the source and detectors to the pipe weighed approximately 5 kg and operated on batteries with an approximate battery life of 100 operating hours. The setup was portable both in size and weight and was effective in determining external corrosion under insulation of steel pipes [ 80 ].…”

Applications of Cd(Zn)Te Radiation Detectors in Non-Destructive Testing and Evaluation

“…The detection of corrosion under insulation in steel pipes were investigated with a radiography based Pipe Corrosion Under Insulation (CUI) profiler [ 80 ]. Aluminum and steel pipes with fiberglass/calcium silicate insulation were inspected with a dual-beam gamma-ray absorption technique utilizing two CZT detectors.…”

“…Insulation thicknesses of 25, 40, and 50 mm were inspected along with pipe internal diameters ranging from 50 mm to 150 mm. Two 100 mCi Am-141 sources were collimated and coupled with two separate CZT detectors with a crystal volume of 20 × 20 × each [ 80 ]. The instrument effectively measures changes in the apparent diameter due to the placement of the two detectors on diametrically opposing surfaces of the pipe.…”

“…The observed changes in count rates would signal an internal diameter change. The device reported diameter deviations every second up to 0.1 mm accuracy, and the lateral scan speed was approximately 6 m per minute [ 80 ]. The carriage that housed the source and detectors to the pipe weighed approximately 5 kg and operated on batteries with an approximate battery life of 100 operating hours.…”

“…The carriage that housed the source and detectors to the pipe weighed approximately 5 kg and operated on batteries with an approximate battery life of 100 operating hours. The setup was portable both in size and weight and was effective in determining external corrosion under insulation of steel pipes [ 80 ].…”

TCAD simulation studies of novel geometries for CZT ring-drift detectors

“…Cadmium zinc telluride (usually denoted by Cd 1−x Zn x Te, CdZnTe or CZT) has emerged as the semiconductor material of choice for a number of x-ray spectroscopy applications in the nuclear industry [1], non-destructive testing [2], medical diagnostics [3] and space sciences [4] areas. It offers several advantages over silicon in the x-and γ-ray energy range between 20-500 keV.…”

Applications of Cd(Zn)Te Radiation Detectors in Non-Destructive Testing and Evaluation

“…The detection of corrosion under insulation in steel pipes were investigated with a radiography based Pipe Corrosion Under Insulation (CUI) profiler [ 80 ]. Aluminum and steel pipes with fiberglass/calcium silicate insulation were inspected with a dual-beam gamma-ray absorption technique utilizing two CZT detectors.…”

“…Insulation thicknesses of 25, 40, and 50 mm were inspected along with pipe internal diameters ranging from 50 mm to 150 mm. Two 100 mCi Am-141 sources were collimated and coupled with two separate CZT detectors with a crystal volume of 20 × 20 × each [ 80 ]. The instrument effectively measures changes in the apparent diameter due to the placement of the two detectors on diametrically opposing surfaces of the pipe.…”

“…The observed changes in count rates would signal an internal diameter change. The device reported diameter deviations every second up to 0.1 mm accuracy, and the lateral scan speed was approximately 6 m per minute [ 80 ]. The carriage that housed the source and detectors to the pipe weighed approximately 5 kg and operated on batteries with an approximate battery life of 100 operating hours.…”

“…The carriage that housed the source and detectors to the pipe weighed approximately 5 kg and operated on batteries with an approximate battery life of 100 operating hours. The setup was portable both in size and weight and was effective in determining external corrosion under insulation of steel pipes [ 80 ].…”

TCAD simulation studies of novel geometries for CZT ring-drift detectors

“…Cadmium zinc telluride (usually denoted by Cd 1−x Zn x Te, CdZnTe or CZT) has emerged as the semiconductor material of choice for a number of x-ray spectroscopy applications in the nuclear industry [1], non-destructive testing [2], medical diagnostics [3] and space sciences [4] areas. It offers several advantages over silicon in the x-and γ-ray energy range between 20-500 keV.…”

Applications of Cd(Zn)Te Radiation Detectors in Non-Destructive Testing and Evaluation

“…The detection of corrosion under insulation in steel pipes were investigated with a radiography based Pipe Corrosion Under Insulation (CUI) profiler [ 80 ]. Aluminum and steel pipes with fiberglass/calcium silicate insulation were inspected with a dual-beam gamma-ray absorption technique utilizing two CZT detectors.…”

“…Insulation thicknesses of 25, 40, and 50 mm were inspected along with pipe internal diameters ranging from 50 mm to 150 mm. Two 100 mCi Am-141 sources were collimated and coupled with two separate CZT detectors with a crystal volume of 20 × 20 × each [ 80 ]. The instrument effectively measures changes in the apparent diameter due to the placement of the two detectors on diametrically opposing surfaces of the pipe.…”

“…The observed changes in count rates would signal an internal diameter change. The device reported diameter deviations every second up to 0.1 mm accuracy, and the lateral scan speed was approximately 6 m per minute [ 80 ]. The carriage that housed the source and detectors to the pipe weighed approximately 5 kg and operated on batteries with an approximate battery life of 100 operating hours.…”

“…The carriage that housed the source and detectors to the pipe weighed approximately 5 kg and operated on batteries with an approximate battery life of 100 operating hours. The setup was portable both in size and weight and was effective in determining external corrosion under insulation of steel pipes [ 80 ].…”

TCAD simulation studies of novel geometries for CZT ring-drift detectors

“…Cadmium zinc telluride (usually denoted by Cd 1−x Zn x Te, CdZnTe or CZT) has emerged as the semiconductor material of choice for a number of x-ray spectroscopy applications in the nuclear industry [1], non-destructive testing [2], medical diagnostics [3] and space sciences [4] areas. It offers several advantages over silicon in the x-and γ-ray energy range between 20-500 keV.…”