Nuclear medicine fume hoods are protective systems specifically designed to ensure the safe handling of radioactive materials. They protect the user from harmful radiation and chemical vapours emitted by radioactive materials. Here are the main characteristics of nuclear medicine fume hoods:
1. Radiation protection
- Fume cupboards are usually fitted with lead-coated panels. These coatings provide protection against alpha, beta and gamma radiation.
- The window part is made of lead glass so that it is safe to look inside.
2. Air flow and filtration
- Ventilation system: Fume cupboards protect the operator from harmful gases and radioactive particles by continuously extracting the air inside the cupboard.
- HEPA filters: High efficiency filters are used to capture radioactive particles and aerosols (optional).
- Carbon filter: Provides filtration of chemical vapours and volatile substances such as radioactive iodine (optional).
3. Controlled working environment
- The internal working environment is normally maintained at negative pressure. This prevents radioactive substances from escaping.
- Fast airflow ensures no build-up in the work area.
4. Ergonomics and user-friendly design
- Glove access (glove box): Some hoods are fully enclosed and the user works with radioactive materials through gloves. (Optional)
- Adjustable working height: Ergonomically designed to ensure operator comfort
5. Material structure
- Internal surfaces are made of materials resistant to radioactive materials and easy to clean. Stainless steel is usually preferred.
- It is important to select materials that are compatible with chemical reagents.
6. Safety systems
- Radiation monitors: Detectors that continuously measure radiation levels can be located inside the fume hood. (Optional)
- Alarm systems: Provides alarms in the event of filter blockage, reduced airflow or increased radiation levels. (Optional)
- Electrical isolation: Protects electrical equipment inside the fume cupboard from radiation. (Optional)
These fume hoods are essential in nuclear medicine to ensure maximum safety, particularly in the preparation and processing of radioactive isotopes.
