Studying factors affecting the indoor gamma radiation dose using the MCNP5 simulation software.

Area of Science:

• Radiation physics and environmental health.
• Nuclear engineering and safety.

Background:

• Indoor gamma radiation is a significant contributor to public radiation exposure.
• Understanding factors influencing indoor gamma dose is crucial for radiation protection.
• Previous studies have explored various shielding materials and room geometries.

Purpose of the Study:

• To investigate the key factors affecting indoor gamma radiation dose.
• To analyze the impact of room dimensions, wall thickness, and material density on dose rates.
• To provide a basis for a simplified calculation model for indoor gamma dose.

Main Methods:

• Utilized MCNP (Monte Carlo N-Particle) version 5 simulation software.
• Developed and executed computational models to simulate gamma radiation transport.
• Calculated relative dose rates based on variations in room parameters and material properties.

Main Results:

• Demonstrated significant variations in indoor gamma radiation dose with position.
• Quantified the relative changes in dose rates due to alterations in room dimensions, wall thickness, and building material density.
• Identified key parameters that most influence indoor gamma radiation levels.

Conclusions:

• Indoor gamma radiation dose is highly sensitive to room geometry and building material characteristics.
• The findings support the development of practical models for estimating indoor radiation exposure.
• Results contribute to improved radiation safety assessments in building design and occupancy.