Time of Flight Diffraction (TOFD), was originally developed by Atomic Energy Authority in the late 70’s and early 80’s. As conventional inspection techniques did not provide the PoD for detection of small flaws within heavy walled nuclear reactors, a technique was required that provided through wall accuracy for flaws, and images for traceability and monitoring.
TOFD has been included in a number of blind trials over the decades and has become widely accepted for crack detection and monitoring due to its accuracy for sizing flaws where the data can feed directly into fracture mechanics and engineering criticality assessments.
Current Uses:
- Weld Inspection
- Weld Root Erosion
- Crack Propagation Monitoring
- Early Stage Corrosion Detection
- Corrosion Monitoring