Safe Handling of Radioactive Sources
- It is very well known that radioactive sources are dangerous if handled improperly
- When choosing a source to work with, the following characteristics are preferred:
- Short-lived isotopes are preferred to long-lived ones
- The smaller the amount of radioactive material, the better
- The risk associated with radioactive materials depends on the amount and type of radiation
- For example, alpha radiation is more ionising than gamma radiation but does not penetrate as far
- The biggest risks when working with radioactive sources are exposure and contamination
- Contamination happens when a piece of radioactive material is transferred onto a person, or a personal item, where it can then decay and cause damage
- The radiation hazard warning safety symbol is used to warn about hazardous materials, locations or objects
- Precautions must be taken to reduce the risk of harm when using radioactive sources. These include:
- Keeping radioactive sources shielded when not in use, for example in a lead-lined box
- Wearing protective clothing to prevent the body from becoming contaminated
- Keeping personal items outside of the room to prevent these from becoming contaminated
- Limiting exposure time so less time is spent with radioactive materials
- Handling radioactive materials with long tongs to increase the distance from them
- Monitoring the exposure of workers, such as radiographers, using detector badges
A badge containing photographic film can be used to monitor a person's exposure to radiation