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Radiography Testing (Working/Basic Principle (The part to be tested is…
Radiography Testing
Working/Basic Principle
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The radiation that passes through the part will expose the film and forms a shadowgraph of the part.
The density of the film or the amount of darkness on the film will vary depending upon the amount of radiation reaching the film.
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Radiography Safety
Ionizing Radiation
Any type of particle or electromagnetic wave that carries enough energy to ionize or remove electrons from an atom.
Example : x-ray, gamma, alpha and beta particle.
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Safety Precaution
- Shielded Enclosed and Exposure Devices are manufactured in compliance with authorization, appropriately surveyed and followed by quality objectives
- Personnel are trained and competent to operate the exposure devices safely
- Approved Operational procedures are to be followed
- Sources are sealed and leak free
- Source to be maintained in safe and secure condition at end of use or are decommissioned properly
- Every personnel involved in radiography shall wear personal monitoring film badge
- Radiation warning sign shall be posted at sufficient locations along the rope and monitored by the technician
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Applications
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For detection of porosity, casting,
lack of fusion in welding and cracks
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Definition
An NDT method that utilizes x-rays or gamma radiation to detect discontinuities in materials, and to present their images on recording medium.
Radiography technique 