The accident at the Chernobyl nuclear power plant (NPP) in Ukraine on April 26, 1986 led to a considerable release of radioactive material resulting in environmental contamination over vast areas of Belarus, Ukraine and western Russian Federation. The major health effect of the Chernobyl accident was an increase in thyroid cancer incidence in people exposed as children and adolescents, so much attention was paid to the thyroid doses resulting from intakes of ¹³¹I. Because cow's milk consumption was the main source of ¹³¹I intake by people, it was important to measure the ¹³¹I activity concentrations in cow's milk to calculate, or to validate, the thyroid doses to the exposed population. Almost 11,000 measurements of total beta-activity in cow's milk were performed using a DP-100 device during the first month after the Chernobyl accident in the most contaminated regions of Belarus. Using an ecological model and calibration coefficients for the DP-100 device the activity concentration of ¹³¹I in cow's milk was derived as well as the activity concentrations of the other radiologically important radionuclides, namely ¹³⁴Cs, ¹³⁷Cs, ⁸⁹Sr and ⁹⁰Sr. The activity concentrations of other radionuclides, such as ⁹⁰Y, ¹³²Te, ¹³²I, ¹³³I, ¹³⁶Cs, ¹⁴⁰Ba, ¹⁴⁰La, ¹⁴¹Ce and ¹⁴⁴Ce, in cow's milk were also estimated and were shown to be of minor importance. The concentrations of ⁹⁵Zr, ⁹⁵Nb, ¹⁰³Ru and ¹⁰⁶Ru in cow's milk were negligible. The data obtained in this study were validated by comparing derived ¹³¹I and ¹³⁷Cs concentrations in cow's milk with gamma-spectrometry measurements performed in milk produced in the same location close to the same date. The results of this study were essential to assess and validate the radiation doses received by the subjects of epidemiological studies related to the health consequences of the Chernobyl accident.

1986 年 4 月 26 日乌克兰切尔诺贝利核电站 (NPP) 事故导致大量放射性物质释放，导致白俄罗斯、乌克兰和俄罗斯联邦西部广大地区的环境污染。切尔诺贝利事故对健康的主要影响是儿童和青少年暴露于甲状腺癌的发病率增加，因此非常关注摄入¹³¹ I 导致的甲状腺剂量。因为牛奶消费是¹³¹ I的主要来源人们的摄入量，重要的是测量¹³¹牛奶中的 I 活动浓度以计算或验证暴露人群的甲状腺剂量。在白俄罗斯污染最严重的地区切尔诺贝利事故发生后的第一个月，使用 DP-100 设备对牛奶中的总 β 活性进行了近 11,000 次测量。使用 DP-100 装置的生态模型和校准系数，推导出牛奶中¹³¹ I 的活度浓度以及其他放射性重要放射性核素的活度浓度，即¹³⁴ Cs、¹³⁷ Cs、⁸⁹ Sr 和⁹⁰ Sr。其他放射性核素的活度浓度，如⁹⁰ Y、¹³² Te、还估计了牛奶中的¹³² I、¹³³ I、¹³⁶ Cs、¹⁴⁰ Ba、¹⁴⁰ La、¹⁴¹ Ce 和^{144 Ce，并显示其重要性不高。}牛奶中⁹⁵ Zr、⁹⁵ Nb、¹⁰³ Ru 和¹⁰⁶ Ru的浓度可以忽略不计。本研究中获得的数据通过比较衍生的¹³¹ I 和¹³⁷在接近同一日期的同一地点生产的牛奶中使用伽马光谱法测量牛奶中的 Cs 浓度。这项研究的结果对于评估和验证与切尔诺贝利事故的健康后果相关的流行病学研究对象所接受的辐射剂量至关重要。