Background Environmental Radiation in a Museum in Chengdu

摘要

In order to grasp the radon concentration and γ-ray radiation level in a museum in Chengdu, and evaluate the radiation damage caused to the museum staff, the radon concentration and the instantaneous dose rate of gamma rays in the museum warehouse and exhibition room were monitored and estimated the annual effective dose caused by it. The results show that the radon concentration range in the museum is 24.12 - 78.9 Bq/m3, the average is 36.17 Bq/m3, far below China’s 400 Bq/m3 standard. The range of γ air absorbed dose rate is 7.1 - 13.6 × 10?8 Gy/h, the average is 10.8 × 10?8 Gy/h, it is the normal natural background range. The average annual effective dose of radon and its decay products was 8.68 × 10?3 - 2.84 × 10?2 mSv/a, the average annual effective dose of γ radiation was 0.100 - 0.192 mSv mSv/a, and the combined dose was 0.109 - 0.220 mSv/a, far less than 1 mSv/a standard.