Abstract
Underground caverns have important military and civilian uses, but their internal natural radiation may endanger human health, and it is necessary to implement protection. The protective measures taken for an underground cavern in Chongqing have obvious effects. The results show that cleaning the radiation source in the environment and sealing the gap of the hole can re-duce the natural radiation intensity inside the cavern to a certain extent, reducing the ambient temperature can significantly reduce the natural radiation intensity inside the cavern, the use of press-in ventilation can greatly reduce the natural radiation intensity inside the cavern, the cumulative drop can reach 25.63%, and the protective effect is obvious. These protective measures can be used in underground caverns to improve the safety of military and civilian activities.
Highlights
Underground caverns are one of the main components of military and civil buildings and play an important role in production and life and air defense exercises
The results show that cleaning the radiation source in the environment and sealing the gap of the hole can reduce the natural radiation intensity inside the cavern to a certain extent, reducing the ambient temperature can significantly reduce the natural radiation intensity inside the cavern, the use of press-in ventilation can greatly reduce the natural radiation intensity inside the cavern, the cumulative drop can reach 25.63%, and the protective effect is obvious
T1 indicates that the outdoor temperature is 28.5 ̊C, the indoor temperature is 30.2 ̊C, the wall temperature is 30.4 ̊C, the outdoor natural radiation is 0.169 μSv/hr, and the natural radiation intensity inside the cavern is 0.199 μSv/hr
Summary
Underground caverns are one of the main components of military and civil buildings and play an important role in production and life and air defense exercises. Studies have shown that due to the widespread presence of natural nuclides such as radon in the soil and soil, there is usually a higher natural radiation in underground buildings such as caverns [1] [2], which may have an impact on the health of staff or those who are conducting air defense exercises. Taking protective measures and analyzing the effect inside an underground cavern of Chongqing City has important guiding significance for exploring and doing a good job of natural radiation protection inside underground buildings
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