Indoor Radon And Radon Progeny Survey At Campinas-brazil Using Cr-39: Final Results

In a survey performed at Campinas-SP, Brazil, the CR-39 detector was used as an alpha-spectrometer taking into account the size and the gray level of round tracks measured under an automatic optical microscopy system. The exposures were carried out in the same room of 70 dwellings during two successive periods of six months: the first one from November 1996 to May 1997 (summer exposure) and the second one from May 1997 to December 1997 (winter exposure). The results of the assessment of radon and radon progeny (RP) joint activity in the air neighboring the detector and the plated-out RP activity on the material surfaces are given. © 2008 Elsevier Ltd. All rights reserved.43SUPPL.1S440S444Abu-Jarad, F., Radon measurements inside houses using nuclear track etch detectors (1989) Proceedings of the International Workshop on Radon Monitoring in Radioprotection, Environmental Radioactivity and Earth Sciences, ICTP, Trieste, Italy, April 3-14, pp. 445-456. , World Scientific Publishing Co. Pte. Ltd., SingaporeAmgarou, K., Font, L., Baixeras, C., A novel approach for long-term determination of indoor 222Rn progeny equilibrium factor using nuclear track detectors (2003) Nucl. Instrum. Meth. A, 506, pp. 186-198Durrani, S.A., Ilic, R., (1997) Radon Measurements by Etched Track Detectors: Applications in Radiation Protection, Earth Sciences and the Environment, , World Scientific Publishing Co., LondonGuedes, S., Hadler, J.C., Iunes, P.J., Navia, L.M.S., Neman, R.S., Paulo, S.R., Rodrigues, V.C., Zúñiga, A., Indoor radon daughters survey at Campinas-Brazil using CR-39: first results (1999) Radiat. Meas., 31, pp. 287-290Hadler, J.C., Paulo, S.R., Indoor radon daughters contamination monitoring: the absolute efficiency of CR-39 taking into account the plate-out effect and environmental conditions (1994) Radiat. Protect. Dosim., 51 (4), pp. 283-296Lung cancer risk from indoor exposures to radon daughters (1987) Ann. ICRP, 17, pp. 1-60. , ICRP Publication 50Leung, S.Y.Y., Nikezic, D., Yu, K.N., Passive monitoring of the equilibrium factor inside a radon exposure chamber using bare LR115 SSNTDs (2006) Nucl. Instrum. Meth. A, 564, pp. 319-323Paulo, S.R., Neman, R., Hadler, J.C., Iunes, P.J., Guedes, S., Balan, A.M.O.A., Tello, C.A., Radon surveys in Brazil using CR-39 (2005) Radiat. Meas., 39 (6), pp. 657-660Planinic, J., Radolic, V., Faj, Z., Suveljak, B., Radon equilibrium factor and aerosols (1997) Nucl. Instrum. Meth. A, 396, pp. 414-417Soroka, Y., Molchanov, A., Radiation and radon survey of Akchatau (Kazakhstan) and experience with radon remedial measures (1998) Radiat. Protect. Dosim., 78, pp. 231-236WHO, 1988. Man-made mineral fibres and radon. In: IARC Monographs on the Evaluation of Carciogenic Risks to Humans, vol. 43, pp. 173-25