What does the term "sealed source" typically refer to in radiation safety?

The term "sealed source" in radiation safety specifically refers to encapsulated radioactive material. A sealed source is designed to contain radioactive isotopes securely within a protective structure that prevents the release of radiation and ensures safety for people and the environment. This encapsulation allows for safe handling and use in various applications, including medical treatments and industrial measurements.

In contrast to sealed sources, unstable isotopes are not necessarily contained and can pose different risks due to their unpredictable decay and emission of radiation. Storage for non-radioactive waste does not involve any radioactive materials at all, while open containers imply a lack of containment, which directly contradicts the idea of a sealed source meant to prevent radiation exposure. Thus, the definition and function of a sealed source are critical in managing radiation safety effectively.