Radiographic Inspections - Non-Destructive Testing (NDT)
Radiographic inspection is a form of nondestructive testing that checks for holes, voids, and discontinuities in welds, etc., using electromagnetic radiation to penetrate metals.
Non-destructive testing (NDT) at TWI
There is potential for workers to be exposed to radioactive source hazards when conducting radiographic inspections due to the use of x-ray emitting devices and/or laser equipment as part of the inspection process.
When radiographic inspections are being conducted, follow the safe work practices below:
- The contractor should be certified and approved to use radiographic devices.
- Conducting these inspections verifies that work is being conducted using equipment that is licensed and approved in accordance with applicable regulations.
- The inspection process should have a written procedure outlining safe work practices associated with inspection activities.
- Schedule the inspection only when a minimum number of workers are in the testing vicinity.
- Identified radiographic testing areas should be designated as Restricted/High-hazard areas. Rope off or barricade these areas.
- Place warning signs in visible locations around the testing area and keep warning signs in place until the testing activity has been completed.
Knowledge Check Choose the best answer for the question.
5-7. When conducting Non-destructive testing (NDT), where must warning signs be placed around the testing area?
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