Jožef Stefan Institute, Ljubljana, Slovenia.
Arh Hig Rada Toksikol. 2021 Mar 30;72(1):23-28. doi: 10.2478/aiht-2021-72-3475. Print 2021 Mar 1.
Ambient dose equivalent *(10) is measured to assess general population exposure to ionising radiation. From its spatial and time variations it is possible to identify sources of exposure. In Slovenia, semi-annual *(10) is measured routinely with thermoluminescence dosimeters at 66 locations around the Nuclear Power Plant (NPP) Krško and at 50 other locations covering the rest of Slovenian territory. Since the Chernobyl accident contamination had ceased to contribute to ambient dose equivalents, we have been calculating correlation coefficients between annual mean number of sunspots and annual *(10). These correlation coefficients were calculated for five locations in western Slovenia and for five annual *(10) extracted from measurements around NPP Krško. Their ranges between -0.64 and -0.38 suggest a clear negative correlation between solar activity and *(10). Mean annual *(10) averted by solar activity in the past two solar maxima reached 0.070 mSv around NPP Krško (155 m.a.s.l.) and 0.132 mSv and 0.180 mSv at Kredarica (2515 m.a.s.l.). Quantifying the influence of the solar activity on the ambient dose equivalent helps us to better understand exposure of the general population to ionising radiation.
环境剂量当量*(10)用于评估一般人群所受电离辐射的暴露情况。通过对其时空变化的分析，可以确定辐射的来源。在斯洛文尼亚，每年在核电厂 Krško 周围的 66 个地点和斯洛文尼亚其余地区的 50 个其他地点，用热释光剂量计定期测量*(10)。自切尔诺贝利事故以来，环境剂量当量*(10)不再受污染的影响，因此我们一直在计算太阳黑子年度平均数与年度*(10)之间的相关系数。我们对斯洛文尼亚西部的五个地点和从 Krško 核电厂周围的测量数据中提取的五个年度*(10)计算了这些相关系数。它们的范围在-0.64 到-0.38 之间，表明太阳活动与*(10)之间存在明显的负相关。过去两个太阳活动极大期期间，太阳活动使 Krško 核电厂附近*(10)的年均剂量当量减少了 0.070 毫希（海拔 155 米），在 Kredarica（海拔 2515 米）的减少量为 0.132 毫希和 0.180 毫希。量化太阳活动对环境剂量当量的影响有助于我们更好地了解一般人群所受电离辐射的暴露情况。
