Nuclear and Environmental Radioactivity Research Laboratory, Institute of Physics, Savanoriu Avenue 231, LT-02300 Vilnius, Lithuania.
J Environ Radioact. 2010 Jun;101(6):464-7. doi: 10.1016/j.jenvrad.2008.08.002. Epub 2008 Sep 24.
Two RBMK-1500 reactor units operated in Lithuania in the 1987-2004 period (one of them was stopped for decommissioning in 2004). This study presents a preliminary investigation of surface deposition density levels of (55)Fe and (63)Ni in moss samples collected in the close vicinity of the Ignalina NPP. Non-destructive analysis by the HPGe gamma-spectrometry was followed by radiochemical separation. Radiochemical analysis was based on anion-exchange and extraction chromatography. (55)Fe and (63)Ni activities were measured by liquid scintillation counting (LSC). The results indicate that the deposition values of (55)Fe are generally higher than those of (60)Co and (63)Ni.
本研究对在距离伊格纳利纳核电站较近地区采集的苔藓样本中的 (55)Fe 和 (63)Ni 的表面沉积密度水平进行了初步调查。该研究涉及两个在 1987 年至 2004 年期间在立陶宛运行的 RBMK-1500 反应堆机组（其中一个于 2004 年停止运行进行退役）。采用 HPGe 伽马能谱仪进行非破坏性分析，随后进行放射化学分离。放射化学分析基于阴离子交换和萃取色谱法。通过液体闪烁计数法 (LSC) 测量 (55)Fe 和 (63)Ni 的活度。结果表明，(55)Fe 的沉积值通常高于 (60)Co 和 (63)Ni。
