MONITORING OF NATURAL RADIOACTIVITY IN SLOVAKIA

Conclusions from monitoring of two main natural sources of human expos ure in Slovak Republic are presented: the outdoor photon dose equivale nt rate (H) over dot(x) and indoor radon volume activity. Dose equival ent rates were determinated by on-line monitoring network IRIS, and of f-line territorial TLD network as well. Radon volume activity was dete rminated by solid state track detectors CR-39. The annual effective do se from external exposure, determinated by IRIS network, is equal to 8 16 mSv.y(-1) Lower value, 618 mSv.y(-1) had been found from TLD networ k data. The effective dose caused by inhalation of radon and its proge ny lays within the range 1.7 to 5.0 mSv.y(-1). Such broad range is cau sed mainly by uncertainties in calculation procedures of radon effecti ve doses.