Περίληψη σε άλλη γλώσσα

THE LEVEL OF INDOOR RADON CONCENTRATIONS IN APARTMENT DWELLINGS IN THE CITY OF THESSALONIKI, NORTH GREECE, THE NATURAL RADIOACTIVITY AND EMENATING RADON FROMBUILDING MATERIALS , AS WELL AS THE RADON EXHALATION FROM THE SOIL , THE RADON CONCENTRATION IN PU BLIC WATER SUPPLY AND OUTDOORS WERE STUDIED , IN ORDERTO ESTIMATE THE RADON ENTRY INTO A TYPICAL ONE-STORY HOUSE. THE INDOOR RADONCONCENTRATIONS RANGED BETWEEN 8 AND 143 BQ.M-3(ANNUAL 30.3 =- 22.7 BQ.M-3) AND WERE AFFECTED BY RAINFALL AND CHANGES OF VENT ILATION RATE (THE ATMOSPHERIC TEMPERATURE AND THE AGE OF BUILDING). SIGNIFICANT HIGH CONCENTRATIONS OF RA-226 UP TO 140 BQ.KG-1 WERE MEASURED IN GREEK CEMENT TYPE PORTLAND35/II DUE TO THE FLY ASH ADDED UP TO 20% , BUT THE AMOUNT OF RADON EMANATING REDUCED ACCORDING TO FLY ASH ADDITIVES. RADON IS DOMINANTLY ORIGINATED FROM CONCRETE WITH EXHALATION RATE AT THE LEVEL OF 5.61+- 2.32 BQ.M-2.H-1 THE RADON EXHALATION RATE FROM A SURFACE IN DEPTH 70 CM INTO THE SOIL W ...
περισσότερα