某火电厂煤灰堆积场附近环境辐射影响评价

A. Boukhair, Laila Belahbib, Khadija Azkour, H. Nebdi, M. Benjelloun, A. Nourreddine
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引用次数: 4

摘要

煤灰在贮存地点的自然放射性增强,其放射性影响是由于存在自然产生的放射性核素。其中一些放射性核素具有数百万年的放射性期,因此有时间迁移到土壤、大气、地表水和地下水中。这种影响主要取决于这些煤灰的活性、接触这些废物的时间、向空气的转移以及雨水的淋滤现象。在本研究中,为了评估jleco -摩洛哥热电厂贮存场址煤灰对环境的辐射影响,用α剂量仪和数字剂量仪对场址周围10公里范围内的煤灰、土壤、大气、地表水和地下水样品进行了一些分析。研究结果表明,在研究区域内,尽管附近(1 ~ 2 km)的氡浓度中等重要,但对贮存场址煤灰土壤的辐射影响不显著,并保持在200 Bq/m3以下。在贮存地点附近(2至3公里)的大气中,这种影响仍然是中等的,氡活度高于10 Bq/m3。这些结果还表明,在氡浓度低于11.1 Bq/l的研究地区,储存地点的水井可能存在水污染,但没有任何放射性转移到地下水中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of the Radiological Impact on the Environment near a Storage Site of Coal Ashes in a Thermal Power Plant
The radiological impact of coal ashes, with enhanced natural radioactivity in the storage site, is due to the presence of naturally occurring radionuclides. Some of these radionuclides have a radioactive period of several million years and will, therefore, have time to migrate to the soil, atmospheric air, surface water, and groundwater. This impact depends mainly on the activity of these coal ashes, the duration of exposure to such waste, transfers to the air, and the leaching phenomenon by rainwater. In this study, and so as to assess the radiological impact of coal ashes of the storage site of the JLEC-Morocco thermal power plant on environment, some analyses are performed by alpha dosimetry and a digital dosimeter on samples of coal ashes, soil, atmospheric air, surface water and groundwater belonging to a perimeter of 10 km around that site. The obtained results show that, within the studied area, the radiological impact on the soil of the coal ashes of the storage site is insignificant even though the concentrations of radon in the near vicinity (1 to 2 km) are moderately important, and remain below 200 Bq/m3. In the atmospheric air, this impact remains medium for the neighborhoods of the storage site (2 to 3 km) with radon activities superior to 10 Bq/m3. These results also show that there may be a water contamination of wells located at the storage site without any transfer of radioactivity into the groundwater of the area studied where the concentrations of radon are less than 11.1 Bq/l.
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