This document is Part 3 of T/CNEA103 "Non-destructive testing of pressurized water reactor pressure components". This document consists of 10 chapters in total, of which Chapters 1-3 are normative provisions, and Chapters 4-10 are Part 3 of non-destructive testing of pressurized water reactor pressure components: main contents of radiographic testing. The main contents include: general requirements, main equipment and equipment, inspection technology, darkroom processing of film, radiographic film quality, defect assessment, quality grading and inspection report.