Eight liquid effluent samples from nuclear power plants (NPP) were analyzed for 63 Ni, 131 I, and gamma radionuclides using methods with low detection limits. The sum of the radionuclides activity concentrations of the effluent samples from NPPs A and B were closely lower than the operator’s results with a maximum of decreasing to 29%, while from NPP C were much lower with a maximum of decreasing to 5%. The unlisted radionuclides account for 5.0–889%. It was indicated that the statistics method of the discharge amount could be established based on a regular investigation of the radionuclide characteristics based on analytical methods with low limits of detection.

中文翻译：

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基于低检出限分析方法的核电厂液体流出物排放统计评价

使用低检测限的方法分析了来自核电厂 (NPP) 的 8 个液体流出物样品中的 63 Ni、 131 I 和 γ 放射性核素。核电厂 A 和 B 的出水样品的放射性核素活度浓度总和非常低于操作者的结果，最大值降至 29%，而核电厂 C 的排放样品的放射性核素活度浓度要低得多，最大值降至 5%。未列出的放射性核素占 5.0-889%。表明基于低检出限的分析方法对放射性核素特性进行定期调查，可以建立排放量的统计方法。