NGHIÊN CỨU NỒNG ĐỘ RADON TRONG NHÀ Ở ĐƯỢC XÂY DỰNG BẰNG MỘT SỐ VẬT LIỆU PHỔ BIẾN TRÊN ĐỊA BÀN THÀNH PHỐ ĐÀ LẠT, TỈNH LÂM ĐỒNG

Abstract

Radon (Rn) is a naturally occurring radioisotope in soil, rock, and building materials. Numerous studies worldwide have demonstrated that areas with high Rn concentrations pose a significant lung cancer risk. To investigate this issue, our research team conducted experimental measurements to compare Rn concentrations in various types of common houses in Da Lat, including wooden houses, brick houses, and ancient villas, using the Korean Radon Eye+ detector. The obtained results show that the indoor Rn concentrations fluctuate throughout the day, peaking in the early morning (eg. 109 Bq/m3) and reaching their lowest levels in the late evening (eg. 7 Bq/m3). The measured concentrations and the calculated annual effective doses remain below the World Health Organization's recommended limit of 150 Bq/m3. Nonetheless, we propose remedial measures to further reduce public exposure to Rn to as low a level as reasonably achievable.