Radiation protection at the RA Reactor in 1993, Part -3, Environmental radioactivity control

Radioactivity control of Institute environment is performed according to the regulations about methods, scope and time-limits for measuring the radioactivity levels in the vicinity of nuclear facilities. During 1993 this control included contamination measurements of air, precipitation, fallout and water currents, Danube and Mlaka stream in the Institute. Air contamination control was measured at 4 measuring stations, two in the Institute and two locations in the direction of wind i.e. Belgrade, 2 km and 7 km away from the Institute respectively. This position of the measuring locations enables control of radiation safety of the Institute, as well as environment of Belgrade taking into account the existence of the reactor and other possible contaminants in the Institute. Control of atmospheric precipitations and fallout was done at two points one in the Institute and the other 2 km away from the Institute. Due to lack of personnel, control of Danube river was limited only to one point, 1145 km, and the stream Mlaka flowing through the Institute into river Bolecica was controlled instead of the river itself. During the period from november 1992 - october 1993, the following samples were taken and analyzed: 532 air samples, 497 precipitation samples, and 24 monthly samples of the river water used for measuring the contamination level. This Annex includes the results of air activity measurements, β activity of precipitations and fallout, tritium content in the precipitations and rivers