The Rooppur Nuclear Power Plant (RNPP), the first nuclear power plant in Bangladesh with a capacity of 2.4 GWe, is under construction on the bank of the river Padma, at Rooppur in Bangladesh. Measurement of background radioactivity in the natural environment adjacent to RNPP finds great importance for future perspectives. Soil and sediment samples collected from upstream and downstream positions of the Padma River (adjacent to RNPP) were collected and analyzed by HPGe gamma-ray spectrometry for primordial radionuclides. The average activity concentrations (in Bqkg⁻¹) of ²²⁶Ra, ²³²Th and ⁴⁰K radionuclides in soil samples were found to be 44.99 ± 3.89, 66.28 ± 6.55 and 553 ± 82.17 respectively. Respective values in sediment samples were found to be 44.59 ± 4.58, 67.64 ± 7.93, 782 ± 108. Relevant radiation hazard indices and dosimetric parameters were calculated and compared with the world average data recommended by US-EPA. Analytical results show non-negligible radiation hazards to the surrounding populace. Measured data will be useful to monitor any change of background radioactivity in the surrounding environment of RNPP following its operation for the generation of nuclear energy.

Rooppur核电站（RNPP）是孟加拉国第一座核电站，容量为2.4 GWe，正在孟加拉国Rooppur的Padma河畔建设。RNPP 附近自然环境中背景放射性的测量对于未来的前景非常重要。从帕德玛河（靠近 RNPP）上游和下游位置收集的土壤和沉积物样品被收集并通过 HPGe 伽马射线光谱法分析原始放射性核素。²²⁶ Ra、²³² Th 和^{4 0}的平均活性浓度（以Bqkg ^{-1 为单位}）土壤样品中的 K 放射性核素分别为 44.99 ± 3.89、66.28 ± 6.55 和 553 ± 82.17。沉积物样品中的相应值分别为44.59±4.58、67.64±7.93、782±108。计算了相关辐射危害指数和剂量学参数，并与US-EPA推荐的世界平均数据进行了比较。分析结果表明，辐射对周围民众的危害不可忽视。测量数据将有助于监测 RNPP 运行以产生核能后周围环境中背景放射性的任何变化。