Monitoring natural and artificial radioactivity enhancement in the Aegean Sea using floating measuring systems

In the present work, the enhancement of radioactivity due to rainfall in the Aegean Sea using floating measuring systems was observed and quantified. The data were acquired with a NaI underwater detection system, which was installed on a floating measuring system at a depth of 3 m. The results of natural and artificial radioactivity are discussed taking into account the rainfall intensity and wind direction. The activity concentration of 214Bi increased up to (991±102) Bq/m3 after strong rainfall in the North Aegean Sea in winter (humid period) with east wind direction. On other hand, the maximum activity concentration reached the level of (110±10) Bq/m3 in summer (dry period) during south winds.