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Neutron Radiography Testing Examinations

About Neutron Radiographic Testing (NR)

Neutron radiography uses an intense beam of low energy neutrons as a penetrating medium rather than the gamma- or x-radiation used in conventional radiography. Generated by linear accelerators, betatrons and other sources, neutrons penetrate most metallic materials, rendering them transparent, but are attenuated by most organic materials (including water, due to its high hydrogen content) which allows those materials to be seen within the component being inspected. When used with conventional radiography, both the structural and internal components of a test piece can be viewed.

Topical Outline

This examination is 4 hrs in length, having 135 questions of equal value.

  1. Principles/Theory
  2. Nature of penetrating radiation
  3. Interaction between penetrating radiation and matter
  4. Neutron radiography
  5. Radiometry
  6. Equipment/Materials
  7. Sources of neutrons
  8. Radiation detectors
  9. Nonimaging devices
  10. Techniques/Calibrations
  11. Blocking and filtering
  12. Multifilm technique
  13. Enlargement and projection
  14. Stereoradiography
  15. Triangulation methods
  16. Autoradiography
  17. Flash Radiography
  18. In-motion radiography
  19. Fluoroscopy
  20. Electron emission radiography
  21. Microradiography
  22. Laminography (tomography)
  23. Control of diffraction effects
  24. Panoramic exposures
  25. Gaging
  26. Real time imaging
  27. Image analysis techniques
  28. Interpretation/Evaluation
  29. Radiographic interpretation
  30. Procedures
  31. imaging considerations
  32. Film processing
  33. Viewing of radiographs
  34. Judging radiographic quality
  35. Safety and Health
  36. Personnel safety and radiation hazards


The number in parentheses following each reference is the ASNT catalog number.