The presence of high indoor radon concentrations,Cx,is a major concern of the public worldwide.Measurements of indoor radon in South Lebanon have been achieved using CR-39 detectors.Cxvalues ranged between 30 and 122 ...The presence of high indoor radon concentrations,Cx,is a major concern of the public worldwide.Measurements of indoor radon in South Lebanon have been achieved using CR-39 detectors.Cxvalues ranged between 30 and 122 Bq m-3 in one of the major towns in the area and are compared with measured atmospheric air Radon.Moderate seasonal variation of Cxindoors has been observed,although 90%of the obtained indoor Cxmeasurements are below 100 Bq m-3.Some homes produced Cxreadings above the permissible limit.Results showed that the ventilation effect played a major factor in reducing radon concentration levels indoors.Health assessment has been considered.Annual effective doses of radon varied from 1.01±0.10 to 8.65±0.50 m Sv a-1 in six homes in one of the four cases studied.These dosage values are above the permitted limit of 2.5 m Sv a-1.Several types of granite contained in the studied homes were identified and their contributions to radon levels indoors were calculated.展开更多
文摘The presence of high indoor radon concentrations,Cx,is a major concern of the public worldwide.Measurements of indoor radon in South Lebanon have been achieved using CR-39 detectors.Cxvalues ranged between 30 and 122 Bq m-3 in one of the major towns in the area and are compared with measured atmospheric air Radon.Moderate seasonal variation of Cxindoors has been observed,although 90%of the obtained indoor Cxmeasurements are below 100 Bq m-3.Some homes produced Cxreadings above the permissible limit.Results showed that the ventilation effect played a major factor in reducing radon concentration levels indoors.Health assessment has been considered.Annual effective doses of radon varied from 1.01±0.10 to 8.65±0.50 m Sv a-1 in six homes in one of the four cases studied.These dosage values are above the permitted limit of 2.5 m Sv a-1.Several types of granite contained in the studied homes were identified and their contributions to radon levels indoors were calculated.
