赤泥及赤泥水泥的放射性水平与其致公众剂量

Levels of Radioactivity in the Red Mud and Red Mud Cement and Its Sendout to Local Resi dents.

本文报道了铝企业中的工业废渣——赤泥及赤泥水泥的天然放射性水平。赤泥所致空气吸收剂量率平均为25.9×10^(-8)Gy·h^(-1),赤泥中的^(226)Ra、^(232)Th和^(40)K的平均比活度分别为477、705和153Bq·kg^(-1).赤泥水泥中的^(226)Ra、^(232)Th和^(40)K的平均比活度分别为202、211和140Bq·kg^(-1);赤泥水泥建造住宅致公众室内剂量当量在2.65～3.49mSv·a^(-1)之间,在混合建材中致公众的附加年有效剂量当量为0.25mSv·a^(-1)。

The levels of radioactivity in the red mud, the wastes of aluminium related industry, and in the cement made from red mud were measured and reported in this paper. The average dose rate in the red mud was estimated to he 25.9×10 8 Gy/h. The results show that average specific activities of 226Ra, 232Th and 40K in the red mud are 477, 705 and 153Bq/kg, respectively. In the cement made from the red mud, the average specific activities of 226 Ra, 232 Th and K are 202, 211 and 140Bq/kg, respectively. It has been estimated that the effective dose equivalent to the local residents is 2.65-3.49 mSv/a. The annual effective dose equivalent to residents caused by the cement made from the red mud in mix construction material is 0.25mSv/a.