地下建筑通风降氡效率研究

A study of reducing radon level by ventilation in underground space

用Model1027型连续测氡仪对中国呼和浩特市某地下建筑作通风降氡效率研究。该地下室有4种通风方式:进风(只开进风机,简称B)、排风(只开排风机,简称P)、进排同时(同时开启进风机和排风机,简称BSP)、进排轮流(轮流开启进风机和排风机,简称BRP)。比较4种通风方式的降氡效率,得出进排同时降氡效果最好。用此方式分别每天通风1、2、3h,观察24h氡浓度变化,得出每天早晨通风2h,足以满足氡浓度8h维持在国家限定标准以下。

Using Model 1027 continuous radon monitor, a test of reducing radon level by ventilation in underground space was done. Four different types of ventilation, i.e. by air pump （P）, by air intake blower （B）, by air pump and air intake blower simultaneously （PBS）, and by air pump and air intake blower in turn （PBT）, were examined. We found that efficiency of PBS is the highest among these ventilation types. Having ventilated the underground space with PBS for 1, 2 or 3 hours in three different days, and having observed the radon concentration change in the following 24 hours, we can conclude that it is safe for people to stay there during the eight working hours if the underground space is ventilated for 2 hours everyday in the morning.