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Sievert or Gray: Dose Quantities and Protection Levels in Emergency Exposure
Chiara Ferrari1, Guglielmo Manenti2, Andrea Malizia2
1Department Industrial Engineering, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy.
Sensors (Basel, Switzerland)
|February 28, 2023
Summary
Radiation protection aims to minimize harm from ionizing radiation. This review discusses shifting from Sievert to Gray units for better assessment of tissue reactions in emergencies.
Area of Science:
- Radiation protection science
- Medical physics
- Health physics
Background:
- Ionizing radiation poses risks, necessitating radiation protection measures.
- Dose quantifies radiation's biological impact, with Sievert for stochastic effects and Gray for tissue reactions.
- High-exposure scenarios, like radiation emergencies, require specific dose metrics.
Approach:
- This review examines the rationale for transitioning from Sievert to Gray units.
- It analyzes necessary adjustments in operational quantities for environmental and individual monitoring.
- The study explores the shift from dose levels to reference levels for emergency exposure.
Key Points:
- The Sievert unit is standard for minimizing stochastic effects.
- The Gray unit is crucial for assessing deterministic effects (tissue reactions) in high-dose situations.
- Adapting monitoring strategies and terminology is essential for effective radiation emergency management.
Conclusions:
- A shift towards using Gray as a reference quantity is proposed for managing high-exposure events.
- Operational quantities and monitoring protocols must be updated to reflect this change.
- Implementing reference levels over dose levels enhances emergency preparedness and response.
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