Which statement is true regarding the testing of brachytherapy sources for leakage?

The information regarding the testing of brachytherapy sources for leakage is based on safety guidelines and regulations concerning radioactive materials. The correct statement indicates that short half-life sources do not require testing for leakage due to their rapid decay, meaning they will not be present long enough to pose a significant radiation hazard through leakage. This allows for a focused approach to safety, as the risk associated with these short-lived isotopes diminishes quickly, and extensive leakage testing would not be practical or necessary.

Testing for leakage is critical for long-lived sources that remain in use for extended periods, as they have a greater potential to cause harm if they leak. Thus, the requirement to test all brachytherapy sources, especially those with longer half-lives, is essential for ensuring patient and staff safety. The other statements do not align with established safety protocols and practices, which emphasize the importance of monitoring source safety continuously, particularly for sources that are in continual use or have the potential to remain functional long enough to accumulate a risk of leakage.