f Radon monitoring in fresh water wells. development of an intelligent autonomous alarming monitoring network, preliminary results.

Radon is a radioactive gas, originating by disintegration of uranium and thorium in rocks and it moves in rock medium and underground water by diffusion and convection. Radon and its disintegration daughter products are sources of alpha radiation and the above gas causes more than 50% of absorbed radiation doses from natural radiation sources to population per year. High Radon concentrations in ground water are dangerous for public health in two ways [1]: either by direct ingestion or by the inhalation of the quantities which are liberated from the water during normal indoor use. Protection of population against high radon concentrations in water is recognized in most countries. Due to complexity of the origin, behavior, movement, distribution and variations of radon in water, various parameters and radon links have to be studied [2]. Current results from radon investigations and approaches to radon risk classification are not consistent. Underestimation or overestimation of radon hazard is reflected by possible health defects and expenses for radon protection. The main objective of the present work is the development of radon risk assessment procedures, involving, investigation, innovation and assessment of measured underground water parameters.