摘要
1995～1997年对防城口岸入出境货物及集装箱实施了γ辐射监测,监测结果显示:锆英砂、独居石的γ辐射剂量当量率平均数(γD)及最大值(γm)均超过国境卫生检疫放射性监测管理标准(1μSv/h),γD分别为6.21、58.63;γm分别为7.12、63.92。[注:独居石β放射性核素表面污染值超过国境卫生检疫管理标准(4Bq/cm^2),其值为28.32Bq/cm^2。]其余监测货物及集装箱γD均未超标。但来自俄罗斯的铜精矿γD超过标准的1/3;钾肥γD超过标准的2/3;除锰矿、钢材、废铜外,其余货物及集装箱γm均超过标准的1/3,其中铜精矿、钾肥γm超过标准的2/3,来自俄罗斯的钾肥γm为1.20,已超标。依据分析结果,提出了今后的监测重点。
This paper analysed the equivalent rate of γ radiation doses of import and export cargo and container at Fangcheng port from 1995 to 1997. The result showed that the average (γD) and maximun (γm) of equivalent rate (μSv/h) of Mon-azite were 6.21 and 58.63, Zircon 7.12 and 63.92, all exceed the Frontier Health and Quarantine radiative monitoring standard (1μSv/h) [Remark: β Surface radioactive contamination of Monazite (28. 32Bq/cm2 ) exceeds the Frontier Health and Quarantine radioactive monitoring standard (4Bq/cm2 ) ] . Other cargo and containers are not in excess of the standard, but γD of Copper concentrate mine and Potash fertilizer come from Russia separately exceed one third and two thirds of standard. Except Manganese mine, Steel products and waste copper, γm of other cargo and containers exceed one third of standard, Copper concentrate mine and Potash fertilizer two thirds of standard, Russian Potash fertilizeer( 1. 2μSv/h) is morethan the standard (1μSv/h) . The author made following emphasis of 7 radiation monitoring, according to the analysis of the result.
出处
《中国国境卫生检疫杂志》
CAS
2000年第1期28-29,67,共2页
Chinese Journal of Frontier Health and Quarantine
