Replace the Linear No-threshold Model with a Risk-informed Targeted Approach to Radiation Protection

Area of Science:

• Radiation Protection Science
• Risk Assessment
• Occupational Health

Background:

• The linear no-threshold (LNT) model is a basis for radiation protection regulations but is scientifically questionable at low doses.
• Current radiation protection practices may be overly conservative, focusing on dose optimization rather than overall risk.

Purpose of the Study:

• To advocate for a shift from the LNT model to a risk-informed, targeted approach in radiation protection.
• To emphasize the protection of individuals by considering a broader spectrum of risks, including chemical and industrial hazards.

Main Methods:

• Critique of the LNT model's scientific validity and practical application.
• Proposal of a risk assessment-based strategy for prioritizing and managing radiation and other occupational risks.
• Analysis of case studies illustrating the complexity of radiation risks in comparison to other hazards.

Main Results:

• The LNT model does not accurately reflect scientific reality, particularly at low doses and dose rates.
• A risk-informed approach can lead to more effective resource allocation for worker and public protection.
• Chemical and industrial risks can outweigh radiation risks in certain scenarios.

Conclusions:

• The LNT model should be replaced by a risk-informed, targeted approach for radiation protection.
• Focus should shift to preventing accidents and incidents across various risk types, prioritizing individual protection.
• Current dose limits are generally sufficient, with potential adjustments for specific populations like astronauts and harmonization of public limits.