Assessing deposition levels of Fe-55, Co-60 and Ni-63 in the Ignalina NPP environment

作者：Gudelis A^*; Druteikiene R; Luksiene B; Gvozdaite R; Nielsen S P; Hou X; Mazeika J; Petrosius R

来源：Journal of Environmental Radioactivity, 2010, 101(6): 464-467.

DOI：10.1016/j.jenvrad.2008.08.002

• Ignalina NPP
• RBMK-1500
• Mosses
• Gamma-spectrometry
• Anion-exchange and extraction chromatography
• Liquid scintillation counting
• Iron-55
• Cobalt-60
• Nickel-63

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 Fe-55 and Ni-63 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. Fe-55 and Ni-63 activities were measured by liquid scintillation counting (LSC). The results indicate that the deposition values of Fe-55 are generally higher than those of Co-60 and Ni-63.

• 出版日期2010-6