Determination of 129 I in biomonitors collected in the vicinity of a nuclear power plant by neutron activation analysis

0388890 - ÚJF 2013 DE eng J - Článek v odborném periodiku
Krausová, Ivana - Kučera, Jan - Světlík, Ivo
Determination of 129 I in biomonitors collected in the vicinity of a nuclear power plant by neutron activation analysis.
Journal of Radioanalytical and Nuclear Chemistry. Roč. 293, 13Sep2012 (2012), s. 1-6. ISSN 0236-5731. E-ISSN 1588-2780
Grant CEP: GA ČR(CZ) GBP108/12/G108; GA MŠMT(XE) LM2011019
Institucionální podpora: RVO:61389005
Klíčová slova: Iodine-129 * neutron activation analysis * biomonitor * nuclear power plant * Thyroid gland
Kód oboru RIV: CB - Analytická chemie, separace
Impakt faktor: 1.467, rok: 2012
http://download.springer.com/static/pdf/725/art%253A10.1007%252Fs10967-012-2200-5.pdf?auth66=1361263915_42267d28376ca81c4fc0de53c3cb59f4&ext=.pdf

Neutron activation analysis (NAA) was used to determine 129 I and the 129 I/ 127 I ratio in bovine thyroid, moss, and river sediment samples collected in the vicinity of the Temelı´n nuclear power plant (NPP) in south Bohemia. The NAA procedures comprised pre-irradiation separation of 129 I by combustion of the samples in the stream of oxygen at 1,000 C and trapping the liberated iodine in a LiOH/ (NH4 )2SO3 solution. Post-irradiation separation of 130 I produced by the reaction 129 I(n,c) 130 I was carried out by extraction of elementary iodine with chloroform followed by precipitation of PdI2. Nondestructive, epithermal NAA was used to determine 127 I employing the 127 I(n,c) 128 I reaction. The results showed that mean values of 129 I and the 129 I/ 127 I ratio in the bovine thyroids varied from 22 to 61 mBq kg -1 (dry mass) and 2.8 9 10 -9 to 5.4 9 10 -9 , respectively. These values are close to the lower end of results reported from various regions non-polluted with 129 I. No significant differences were found between 129 I concentrations and the 129 I/ 127 I ratios in the bovine thyroids collected prior to the start and after several years of operation of the NPP. The mean value and standard deviation of 129 I in mBq kg -1 , dry mass and the 129 I/ 127 I ratio in moss Pleurozium schreberi were 23 ± 16 and 2.3 9 10 -9 , respectively, whereas values of 129 I in the river sediments were below 8–10 mBq kg -1 (dry mass) after several years of the NPP operation.
Trvalý link: http://hdl.handle.net/11104/0217789