Roeck D R, Reavey T C, Hardin J M
Health Phys. 1987 Mar;52(3):311-23. doi: 10.1097/00004032-198703000-00005.
Five coal-fired electric utility plants were sampled to determine radionuclide concentrations in all major process streams. The results, together with plant operating data, were used to track the following six naturally occurring radionuclides: 238U, 226Ra, 210Po, 210Pb, 230Th and 232Th. For each plant, radionuclide balances were computed and the amount and extent of volatilization and enrichment of any radionuclides in the stack effluent were determined. In general, most of the radioactivity was found in boiler bottom ash or particulate control equipment hopper ash; atmospheric emissions were quite small in comparison. Radionuclides in the stack effluent were not detected in the gaseous state and some (especially 210Po and 210Pb) were preferentially associated with the smallest fly-ash particles.
对五家燃煤发电厂进行了采样，以确定所有主要工艺流程中的放射性核素浓度。这些结果与电厂运行数据一起，用于追踪以下六种天然存在的放射性核素：238U、226Ra、210Po、210Pb、230Th和232Th。对于每家电厂，计算了放射性核素平衡，并确定了烟囱排放物中任何放射性核素的挥发量和富集程度。一般来说，大部分放射性物质存在于锅炉底灰或颗粒控制设备料斗灰中；相比之下，大气排放物相当少。烟囱排放物中的放射性核素未在气态中检测到，一些（尤其是210Po和210Pb）优先与最小的飞灰颗粒相关联。
