Radiography Testing (RT) II: Interpretation & Evaluation

Course Overview

Radiographic Testing Level II builds upon foundational knowledge to prepare individuals for advanced certification in radiographic testing. The course satisfies the training requirements outlined in NAS-410, SNT-TC-1A, and NavSea Technical Publication T9074-AS-GIB-010/271, and aligns with the training subjects listed in ANSI/ASNT CP-105. Designed to deepen understanding of radiographic techniques, equipment, and interpretation, this course reinforces key safety protocols and enhances the learner’s ability to evaluate radiographic images accurately. When combined with hands-on training under the supervision of a certified Level II or III, this course fulfills the total training hours required for Level II certification. Upon successful completion of all course material and exams, a training certificate will be issued.

Upon Completion, Learners Covers:

• Review of Level I data; applications of radiography; types of radiation; the atom; isotope production; decay process; measurement of radioactivity; specific activity; half-life; electron volt; energies of gamma sources and x-rays; ions and ionization; scatter radiation
• ALARA; methods of protection against radiation exposure; inverse square law calculations; shielding and half value layers of different materials; half value layer calculations; posting requirements
• Preparation for conducting radiation operations; gamma ray equipment; collimator; x-ray tube and operation; personnel monitoring equipment; survey meter operation and types; pocket dosimeter, film badge, OSLD, TLD, RATE ALARMS
• Radiographic quality; sensitivity, contrast, and definition; characteristic film curves; latitude; unsharpness; backscatter; geometric unsharpness; part geometry effects on radiograph
• Film processing techniques, film structure and speeds, film artifacts, and lead screen use
• Measuring radiographic quality with IQIs; Types of IQIs; placement of IQIs; exposure calculations and charts; film density and measuring of density; determining source to film distance; film viewers
• Radiographic techniques; IQI placement and shims; Parallax formula; radiograph layout for neatness and accurate information
• Computed Radiography (CR) and Digital Radiography (DR) terminology, techniques, and equipment handling are discussed; image intensifiers, linear diode arrays, DDA panels, line pair and contrast sensitivity gauges, and spatial resolution are also discussed
• Terminology discontinuities, defect, false indication, non-relative indication, relative indication; linear vs. rounded indications; classifications of discontinuities; product discontinuities; service discontinuities
• Welding processes and welding discontinuities
• Film interpretation and evaluation elements, weld discontinuities, radiographs of actual discontinuities, and casting discontinuities
• Codes; specifications; ASTM reference radiographs; procedures; reports
• Process control checks, formulas, and conversions

This course meets the recommendations for training as described in SNT-TC-1A.

NOTE: There is RECOMMENDED READING assigned at the beginning of the course. The completion of these assignments in addition to self-study is strongly encouraged and will add to the overall training benefit and time to be credited. It will also better prepare the student for the practical lab/’hands-on” session. It is recommended that the student a log of the self-study time. It is also recommended that the applicable Level III be involved and confirm that the reading and self-study assignments have been completed. This should become a part of the student’s training records which may be used in conjunction with subsequent certifications.

Meet the Instructor

• 

  Gary Larson

  Gary Larson brings over 40 years of NDT experience across industries including nuclear, aerospace, and manufacturing. He holds ASNT Level III certifications in RT, UT, PT, MT, and VT, along with ACCP credentials. Gary has worked with Sikorsky and Pratt & Whitney, providing inspection and training in multiple methods. He currently consults as a Level III for aerospace and military suppliers and contributes to ASTM’s E07 Committee. His teaching experience includes developing and delivering online NDT courses.