This standard establishes a system of classification for sealed radioactive sources based on performance specifications related to radiation safety. It provides a manufacturer of sealed sources with a series of tests for evaluating the safety of the product under specified conditions. It also assists a user of such sources to select a type that suits the intended application insofar as maintenance of source integrity is concerned. Tests are prescribed for all sources for temperature, external pressure, impact, vibration, and puncture over a range of severity. Tests are also prescribed for bending of sources that are very long compared to their diameter or width.