RBMK 反应堆核电站附近树木年轮中的 14c

IF 2 3区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS Radiocarbon Pub Date : 2024-01-23 DOI:10.1017/rdc.2023.125
Evgeniy I Nazarov, Alexander V Kruzhalov, Maxim E Vasyanovich, Alexey A Ekidin, Maria D Pyshkina, Vladimir V Kukarskikh, Ekaterina V Parkhomchuk
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引用次数: 0

摘要

本文介绍了库尔斯克核电厂(俄罗斯)附近树木年轮中放射性碳(14C)浓度的测量结果,该核电厂有四个运行中的 RBMK 反应堆。采样是在植被中放射性碳预期积累量最高的地点进行的。该地点是根据长期气象数据确定的。俄罗斯新西伯利亚布德克核物理研究所的加速器质谱仪对 14C 浓度进行了测量。结果表明,库尔斯克核电厂的开采对树木年轮中的 14C 浓度产生了影响。根据树木年轮和周围空气中 14C 比率之间的平衡,对放射性碳排放和有效剂量进行了回顾性估算。有效剂量有两种计算方法:一种是国际原子能机构(IAEA)的方法,另一种是考虑到库尔斯克地区实际食物消耗量的不太保守的方法。第二种方法计算出的剂量值(0.08-2.58 μSv)比国际原子能机构方法(0.17-5.30 μSv)低 2 倍多。树环中 14C 测量值与背景值的最大差值为 41.7 ± 5.8 pMC(2014 年石墨堆修复期间)。在考虑期间,14С 暴露的主要原因是本底--从 70% 到 99%。
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14C IN TREE RINGS IN THE VICINITY OF THE RBMK REACTOR NUCLEAR POWER PLANT
The paper presents the results of radiocarbon (14C) concentration measurements in tree rings in the vicinity of Kursk NPP (Russia) with four operating RBMK reactors. The sampling was carried out from the site with the highest expected accumulation of radiocarbon in vegetation. The site was determined with long-term meteorological data. The measurements of 14C concentration carried out with accelerator-mass spectrometer in Budker Institute of Nuclear Physics, Novosibirsk, Russia. The obtained results demonstrated the influence of exploitation of Kursk NPP to the concentration of 14C in tree rings. Based on the equilibrium between the 14C ratio in the tree rings and the surrounding air, retrospective estimates of the radiocarbon discharge and effective doses were made. Effective doses were calculated with two approaches: IAEA methodology and less conservative approach, considering the real food consumption in the Kursk region. The values of calculated doses by the second method (0.08–2.58 μSv) are more than 2 times less than IAEA approach (0.17–5.30 μSv). The highest difference between measured and background 14C in tree ring is 41.7 ± 5.8 pMC in 2014 during the restoration of graphite stack. The main contribution to 14С exposure in the considering period is caused by background – from 70 to 99%.
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来源期刊
Radiocarbon
Radiocarbon 地学-地球化学与地球物理
CiteScore
16.20
自引率
6.00%
发文量
85
审稿时长
6-12 weeks
期刊介绍: Radiocarbon serves as the leading international journal for technical and interpretive articles, date lists, and advancements in 14C and other radioisotopes relevant to archaeological, geophysical, oceanographic, and related dating methods. Established in 1959, it has published numerous seminal works and hosts the triennial International Radiocarbon Conference proceedings. The journal also features occasional special issues. Submissions encompass regular articles such as research reports, technical descriptions, and date lists, along with comments, letters to the editor, book reviews, and laboratory lists.
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