Wilhelmová L, Tomásek M, Stukheil K
Institute of Radiation Dosimetry, Czech Academy of Sciences, Prague.
Biol Trace Elem Res. 1994 Fall;43-45:725-30. doi: 10.1007/BF02917377.
Krypton-85 atmospheric contamination produced by the nuclear industry has been investigated on the basis of regular measurements. 85Kr concentrations observed in ground-level air of Prague between 1983 and 1993 are presented and their time-related changes analyzed. The long-term trend of 85Kr activity increased steadily over the monitored period with the growth rate of 38 mBq.m-3 (STP)/yr and reached about 1.2 Bq.m-3 (STP) in 1992. Short-term variations of the baseline level with the average amplitude of 12% show a seasonal periodicity. Occasionally detected extreme values of up to 2.5 Bq.m-3 (STP) indicate undispersed emissions from distant nuclear fuel reprocessing plants.
基于定期测量对核工业产生的氪-85大气污染进行了调查。给出了1983年至1993年期间在布拉格地面空气中观测到的85Kr浓度，并分析了其随时间的变化。在监测期内，85Kr活度的长期趋势以38 mBq·m-3（标准温度和压力）/年的增长率稳步上升，1992年达到约1.2 Bq·m-3（标准温度和压力）。基线水平的短期变化平均幅度为12%，呈现出季节性周期。偶尔检测到高达2.5 Bq·m-3（标准温度和压力）的极值，表明来自远处核燃料后处理厂的排放未得到扩散。
