兰州地区块根、块茎类作物中天然放射性含量及其所致内照射剂量估算

Contents of Naturally Occurring Radionuclides in Subterranean Crops in Lanzhou Area and Estimation of Internal Dose

本文报道了兰州地区块根、块茎类地下作物中的天然放射性含量,年摄入量和食后所造成的待积有效剂量当量。结果表明:兰州地区块根、块茎类地下作物中天然放射性核素的含量属于本底水平。估算结果表明:兰州居民通过食用这些地下作物而摄入的天然放射性核素的年摄入量是1.48×104Bq,待积有效剂量当量是7.18×10-5SVY-1。

This paper is about the contents of naturally occorring radionuclides (U,Th,^(226)Ra and ^(40)K)in subterranean crops in Lanzhou area, and the annuual levels of intake and committed effective dose equivalent to man by ingestion of subeterranean crops. Results indicate that the contents of naturally occurring radionuclides in subterranean crops in Lanzhou area have been approximated to the background level. The results of estimation indicate that the aanaul level of adult's intake in Lanzhou area is 1.48×10~4 Bq and the committed effective dose equivalent from ingestion is 7.18×10^(-5)SyY^(-1).