engleski

14C ACTIVITY MONITORING IN THE VICINITY OF THE NUCLEAR POWER PLANT KRŠKO 2006 – 2011

Monitoring of 14C activity in the atmospheric CO2 and in biological samples (apples, corn, wheat and grass) in the close vicinity of the Krško Nuclear Power Plant (NPP) has been regularly performed since 2006 to estimate the possible influence of the plant on environmental 14C levels and eventually its possible contribution to the effective dose of local population through food chain. Atmospheric CO2 was collected regularly every two months, while the biological samples were collected twice a year (in June/July and September/October) on several locations within a radius of about 1 km from the Krško NPP, as well as on the control point at Dobova, 12 km from the plant. Increase of 14C activity in atmospheric CO2 is observed during and immediately after the refueling of the power plant, which has been performed every 18 months. 14C activities in plants from the vicinity of NPP are always higher than those at the control point, and depend both on the distance from the exhaust of the plant ventilation system and on the prevailing wind direction. Higher 14C activities are measured in plants if the refueling has been performed in spring, while autumn effluents do not significantly influence the 14C activity in plants.

14C; atmospheric CO2; plants; monitoring; environment

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