Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi !

14C in biological samples from the vicinity of NPP Krško (CROSBI ID 530188)

Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija

Obelić, Bogomil ; Krajcar Bronić, Ines ; Barešić, Jadranka ; Sironić, Andreja ; Breznik, Borut 14C in biological samples from the vicinity of NPP Krško // Regional and Global Aspects of Radiation Protection: Final Programme and Abstracts. Bukurešt: International Radiation Protection Association (IRPA), 2007. str. 215, T9-P14-216

Podaci o odgovornosti

Obelić, Bogomil ; Krajcar Bronić, Ines ; Barešić, Jadranka ; Sironić, Andreja ; Breznik, Borut

engleski

14C in biological samples from the vicinity of NPP Krško

Radioactive isotope 14C is naturally produced in the atmosphere and then distributed in the atmosphere and biosphere. The equilibrium 14C atmospheric specific activity equals 226 Bq/kg of carbon. In the second half of the 20th century the natural 14C distribution was disturbed by atmospheric bomb tests. After the ban of atmospheric bomb tests the present-day atmospheric 14C activity approaches the natural (non-disturbed) values. 14C is produced also in nuclear power plants. The emitted CO2 enters the natural carbon cycle, and through food chain it may contribute to the dose of the local population. Specific 14C activity of biological samples (apples, corn, cereals, borecole, grass) was measured in immediate and wider vicinity of the Nuclear Power Plant Krško (NPPK) in Slovenia, close to the border with Croatia. Sampling campaigns were performed in July and in October 2006 at sampling sites that were chosen in the immediate vicinity of the NPP stack (250 – 700 m difference), in a wider environment (1000 – 1500 m), and at a control site 10 km away. The aim of this study was to determine possible contribution of NPPK to the effective dose of local population through food chain. Biological samples were dried, carbonized at 400°C, and combusted in a stream of oxygen. The obtained CO2 was absorbed in a mixture of Carbosorb E and Permafluor E. 14C activity was measured by a liquid scintillation counter Quantulus 1220. Mean a14C at the control site was in July 233 ± 3 Bq/kg C. Most of the locations in the vicinity of NPPK showed slightly higher 14C activities. The largest difference was 66 Bq/kg C. The results are similar for the October campaign: at the control site we measured 235 ± 3 Bq/kg, and highest activities (difference up to 53 Bq/kg C) were measured again at the same locations as in July. Spatial distribution of 14C activities around NPPK showed the activity dependence on the distance and on the direction. Increased (especially the highest) 14C activities in both sampling campaigns were in the SW-NE direction, and this direction coincided with the most pronounced wind directions. A conservative estimate of the effective dose (ingestion of food of the highest 14C activity throughout the year) gives the difference of about 3 µ Sv above dose from natural 14C. A more realistic estimate, however, results in the contribution of NPPK through the ingestion of food grown in its vicinity of less than 1 µ Sv.

14C; nuclear power plant; biological samples; monitoring; atmospheric CO2; Krško

U Knjizi sažetaka tiskani samo sažeci, na web-stranici također, a cjeloviti radovi objavljeni su na pratećem CD-ROMu.

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o prilogu

215, T9-P14-216.

2007.

objavljeno

Podaci o matičnoj publikaciji

Regional and Global Aspects of Radiation Protection: Final Programme and Abstracts

Bukurešt: International Radiation Protection Association (IRPA)

10 973-87778-3-6

Podaci o skupu

IRPA Regional Congress for Central and Eastern Europe "Regional and Global Aspects of Radiation Protection"

poster

24.09.2007-28.09.2007

Brašov, Rumunjska

Povezanost rada

Geologija