Abstract

Radiological hazards associated with naturally occurring radionuclides in materials from Rosterman gold mine were assessed by analysis of 30 samples. The gamma-ray spectrometric analysis of tailing samples reported an average activity concentration of 263 ± 13, 123 ± 6 and 84 ± 4 Bq kg⁻¹ for ⁴⁰K, ²³²Th and ²²⁶Ra, respectively. The average absorbed dose rate was 124 ± 6 nGy h⁻¹, while the annual effective dose of 0.4 ± 0.02 mSv y⁻¹ for indoor and 0.3 ± 0.01 mSv y⁻¹ for outdoor were reported. The mean and range of radiological parameters (external and radium equivalent) calculated from the tailing samples were within the permissible limits and hence mining of gold at Rosterman has no significant radiological health implication on the miners and the surrounding population.

中文翻译：

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肯尼亚，卡卡梅加，卢比，罗斯特曼金矿尾矿中天然放射性核素引起的放射性危害估算。

摘要

通过分析30个样品，评估了Rosterman金矿材料中与天然放射性核素相关的放射危害。拖尾样品的伽玛射线光谱仪分析报道的263±13 123±6和84±4贝kg的平均活性浓度，^-1为⁴⁰ K，²³² Th和²²⁶镭，分别。平均吸收剂量率为124±6 nGy h ^-1，而室内的年有效剂量为0.4±0.02 mSv y ^-1，年有效剂量为0.3±0.01 mSv y ^-1用于室外的报道。根据尾矿样品计算出的放射学参数（外部和镭当量）的平均值和范围均在允许的范围内，因此，在Rosterman开采金矿对矿工和周围人口没有显着的放射学健康影响。