Sanjoy Das: About the Author
Scientific Officer - Quality Assurance Division, Bhabha Atomic Research Centre
Sanjoy Das received Bachelor Degree in Metallurgical Engineering, B.E. (Met), from Jadavpur University, Kolkata. He joined Bhabha Atomic Research Centre (BARC) in 1996 (40th class of BARC Nuclear Eng. Training School). He is level-III in radiography method (RT III) and level-II in ultrasonic test (UT II). His areas of expertise include Industrial Radiography, Digital Signal Processing (DSP), Wavelet Analysis, and Digital Image Processing.
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Published Articles
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November/December 2012 Inspectioneering Journal
Radiography technique is one of the most widely utilized non-destructive methods, used in industry to evaluate the structural integrity or find out the hidden details of an assembled structure. Since this method uses ionizing radiation, it is important to ensure not only the quality of product, but also the safety of the technician and the general public, as well as the protection of the environment.
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November/December 2010 Inspectioneering Journal
Rapid industrial and technological growth throughout the world makes it necessary to develop new materials along with advanced Non-Destructive Testing (NDT) Methods to ensure their quality without premature failures. The complex modern system, where materials are required to perform consistently with optimum efficiency, demands stringent quality control of engineered components.
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July/August 2005 Inspectioneering Journal
Radiography is the most widely used volumetric examination technique for non-destructive evaluation of components, as it offers the advantage of direct viewing of the flaw image, judging the type of flaw and provides a permanent record. Flaw characterization methods, described by size, shape & Location, require classification of the type or nature of flaw, position of flaw and flaw severity. Accurate sizing of the flaw to assess its severity is important. ISO Guide 25 "General Requirements for the Competence of Calibration and Testing Laboratories" (1990), requires one to specify the uncertainty of each measurement. In radiography there are several factors which contributes to uncertainty for quantitive measurement. This paper describes a study undertaken to calculate the uncertainty in flaw sizing and to estimate the real size of discontinuities observed in radiography.