Methodology for measurement in schools and kindergartens: experiences

Area of Science:

• Environmental Health
• Building Science
• Indoor Air Quality

Background:

• Radon is a naturally occurring radioactive gas that poses a significant health risk, particularly in indoor environments.
• Schools and preschools can be susceptible to elevated radon levels due to building characteristics and occupancy.
• Previous studies have indicated potential links between building renovations and indoor radon concentrations.

Purpose of the Study:

• To assess long-term radon levels in a large cohort of school and preschool facilities.
• To investigate the impact of thermal retrofitting on indoor radon concentrations.
• To evaluate the effectiveness of a two-stage measurement methodology for radon investigation in these settings.

Main Methods:

• Conducted long-term radon measurements in over 1500 schools and preschools over a three-year period.
• Utilized a two-stage measurement methodology for comprehensive radon assessment.
• Analyzed data to identify factors influencing radon levels, including ventilation rates and building modifications.

Main Results:

• A negative correlation was observed between thermal retrofitting and long-term average radon levels.
• Some facilities exhibited high radon levels attributed to inadequate ventilation, necessitating changes in ventilation habits.
• Elevated radon concentrations in other facilities were linked to soil gas ingress, requiring technical mitigation measures.

Conclusions:

• Thermal retrofitting can inadvertently increase indoor radon levels in educational facilities.
• Ventilation strategies and addressing soil gas intrusion are critical for managing radon risks.
• The presented two-stage measurement methodology provides valuable insights for long-term radon monitoring in schools and preschools.