Port Said is an Egyptian coastal city, laying on Mediterranean Sea. The city is a world-renowned international harbor and a free-trade zone. Therefore, it is one of the most popular shopping destinations in Egypt, where people can buy duty-free goods and enjoy the city’s free public beaches in summer vacations. Recent radiological hazards studies had located several high radioactive lenses along the Nile Delta coastline, resulted from accumulations of black sand deposits. Concerns had been raised regarding the safety of individuals who might be exposed to high doses of radiations due to the presence of black sand deposits along Port Said beach, especially when the beach is characterized by positive accretion rates. Detailed ground radioactivity surveys were conducted at the beach aiming to measure the activity concentrations of the naturally occurring radioelements ( 238 U, 232 Th and 40 K). Spatial distributions of the three elements were mapped. Dose Rate (DR) and Annual Effective Dose Rates (AEDR) were calculated. Although the results of AEDR revealed that the radiations levels are fallen within the allowed limits, the Excess Lifetime Cancer Risk (ELCR) factor exceeded the world’s average of 0.25. For public awareness, high-risk areas were delineated on a risk map, showing the locations where gamma radiation emissions exceeded the allowed exposure limits for humans. It is recommended to apply the same surveying procedures at all of the public beaches along Sinai coasts, where larger quantities of Black Sands had been detected along its shoreline.

中文翻译：

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埃及塞得港公共海滩沿线伽马辐射的辐射影响和环境监测

塞得港是埃及沿海城市，位于地中海。这座城市是世界著名的国际港口和自由贸易区。因此，它是埃及最受欢迎的购物目的地之一，人们可以在暑假期间购买免税商品并享受城市的免费公共海滩。最近的放射危害研究在尼罗河三角洲海岸线上发现了几个高放射性透镜，这是由于黑沙沉积物的堆积造成的。由于塞得港海滩沿线存在黑沙沉积物，尤其是当海滩具有正吸积率时，人们对可能暴露于高剂量辐射的个人的安全表示担忧。在海滩进行了详细的地面放射性调查，旨在测量天然存在的放射性元素（238 U、232 Th 和 40 K）的活性浓度。绘制了三个元素的空间分布图。计算剂量率 (DR) 和年有效剂量率 (AEDR)。尽管 AEDR 的结果显示辐射水平在允许的范围内，但超额终生癌症风险 (ELCR) 系数超过了世界平均水平 0.25。为了提高公众意识，在风险地图上划定了高风险区域，显示了伽马辐射排放超过人类允许暴露限值的位置。建议在西奈海岸沿线的所有公共海滩应用相同的调查程序，在那里沿海岸线检测到大量黑沙。