Naslov
Ten years of monitoring 14C activity in atmospheric CO2 and biological samples around the Krško Nuclear Power Plant , Slovenia

Autori
Krajcar Bronić, Ines ; Obelić, Bogomil ; Barešić, Jadranka ; Horvatinčić, Nada ; Borković, Damir ; Breznik, Borut ; Volčanšek, Aleš ; Sironić, Andreja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
RAD4 - Fourth International Conference on Radiation and Applications in Various Fields of Research, Book of Abstracts / Ristić, Goran - Niš : Univerzitet u Nišu, 2016, 458-458

ISBN
978-86-6125-160-3

Skup
RAD4 - Fourth International Conference on Radiation and Applications in Various Fields of Research

Mjesto i datum
Niš, Srbija, 23.05.2016. - 27.05.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
14C; monitoring; environment; NEK; atmospheric CO2; plants

Sažetak
14C activity in the atmospheric CO2 and in biological samples in the close vicinity of the Krško Nuclear Power Plant (NPP) in Slovenia has been regularly monitored since 2006 with the aim of estimating a possible influence of the NPP on environmental 14C levels and on the effective dose of local population through food chain. Atmospheric CO2 on two locations was collected every two months, or in shorter periods during some refuelling periods. Biological samples (apples, corn, wheat, grass, vegetables) were collected twice a year (in summer and autumn) in two circles around the NPP, inner and outer, and at the control point 12 km from the plant. Increase of 14C activity in atmospheric CO2 was observed during and immediately after the refuelling of the power plant, performed every 18 months. Good correlation between the total 14C activity released in gaseous effluents and the 14C activity of the atmospheric CO2 has been observed. 14C activity in plants collected close to the Krško NPP is always higher than the activities on the control point, and depends both on the distance from the exhaust of the plant ventilation system and on wind direction: it is higher on the location in the SW-NE direction that coincided with the most pronounced wind directions. Higher 14C activities have been determined in plants collected in summer after the spring refuelling than in those collected during the following vegetation period after the autumn refuelling. This can be explained by the uptake of the CO2 of higher 14C activity for the process of photosynthesis after spring refuelling. To estimate the realistic effective dose due to ingestion to the population in the vicinity, a model of food consumption has been proposed. The calculated dose for the population at the NPP vicinity is not significantly different from the dose for the population at the control point.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA