Alonso-Hernández C M, Bernal-Castillo J, Morera-Gómez Y, Guillen-Arruebarrena A, Cartas-Aguila H A, Acosta-Milián R
Centro de Estudios Ambientales de Cienfuegos, AP 5. Ciudad Nuclear, Cienfuegos, Cuba.
Radiat Prot Dosimetry. 2014 Mar;158(4):421-6. doi: 10.1093/rpd/nct237. Epub 2013 Sep 30.
The radioactivity of NORM was measured in ashes collected from a fuel-oil power plant in Cienfuegos, Cuba, using an HPGe gamma-ray spectrometer. The (226)Ra, (210)Pb, (40)K, (232)Th and (238)U activity concentrations reached 240, 77, 59, 70 and 15 Bq kg(-1), respectively. The potential radiological hazard of these residuals was assessed. The radium equivalent activities of the samples varied from 54 to 345 Bq kg(-1). The gamma index was calculated to be lower than that of the reference values, and the gamma absorbed dose rate was higher than the average reported for the earth's crust; however, the assessed annual effective dose was slightly lower than the annual effective dose limit for public, i.e. 1 mSv. Therefore, these bottom ashes were not dramatically enriched with radionuclides and may be used as an additive for building materials without restrictions from a radiological protection point of view.
使用高纯锗γ射线光谱仪对从古巴西恩富戈斯一家燃油发电厂收集的灰烬中的天然放射性核素物质（NORM）的放射性进行了测量。镭-226、铅-210、钾-40、钍-232和铀-238的活度浓度分别达到240、77、59、70和15贝克勒尔每千克。对这些残渣的潜在放射性危害进行了评估。样品的镭当量活度在54至345贝克勒尔每千克之间变化。计算得出的γ指数低于参考值，γ吸收剂量率高于地壳的平均报告值；然而，评估得出的年有效剂量略低于公众的年有效剂量限值，即1毫希沃特。因此，这些底灰并未显著富集放射性核素，从辐射防护的角度来看，可不受限制地用作建筑材料添加剂。
