Traces of fission products in southeast Spain after the Fukushima nuclear accident.

Abstract Traces of 131 I, 134 Cs and 137 Cs were measured after the Fukushima nuclear accident between 23 March and 13 April 2011 in southeast Spain. The movement of the radioactive cloud toward southeast Spain was reconstructed based on the backward and forward trajectory cluster analyses. Polar maritime air masses which had originated over North America transported the radioactive plume toward the southeast Spain. Aerosols, rainwater, vegetables and cheese were analyzed to determine the radioactive risk. The highest concentrations of 131 I, 134 Cs and 137 Cs in air samples were 2.63 ± 0.12 mBq/m 3 ; 0.10 ± 0.03 mBq/m 3 ; 0.09 ± 0.02 mBq/m 3 , respectively. After precipitation on April 3rd, the maximum concentrations of 131 I, 134 Cs and 137 Cs were detected in rainwater samples, 1.10 ± 0.16 mBq/L; 0.022 ± 0.003 mBq/L; 0.05 ± 0.03 mBq/L, respectively. As a consequence, 131 I was transferred to the human food chain, and found in chard and goat cheese, 0.97 ± 0.20 Bq/kg and 0.52 ± 0.08 Bq/kg, respectively. The traces of 131 I, 134 Cs and 137 Cs detected in the different samples were so low, that there is no impact on human health or the environment in Spain after the Fukushima nuclear accident.