Lung Cancer Attributable to Indoor RadonExposures in Two Radon - Prone Areas, Stei(Romania) and Torrelodones (Spain)

摘要

Radon and radon progeny are present indoors, in houses and others dwellings,representing the most important contribution to dose from natural sources of radiation. Moststudies have demonstrated an increased risk of lung cancer at high concentration of radon forboth smokers and nonsmokers. For medium and low concentrations which are the typicalresidential radon levels, recent researches have also demonstrated increased risks of lung cancerfor people exposed. The work presents a comparative analysis of the radon exposure data in thetwo radon – prone areas, Stei, Transylvania, (Romania), in the near of old Romanian uraniummines and in the granitic area of Torrelodones town, Sierra de Guadarrama (Spain). Oneimportant difference between the two studied areas is related to the houses built using uraniumwaste as construction material in Stei area. Measurements of indoor radon were performed in280 dwellings (Romania) and 91 dwellings (Spain) by using nuclear track detectors, CR 39. Thehighest value measured in Stei area was 2650 Bq.m~(-3)and 366 Bq.m~(-3)in the Spanish region. Theresults are compute with the BEIR VI report estimates using the age-duration model at anexposure rate below 2650 Bq.m~(-3). A total of 233 lung cancer deaths were calculated in the