2011 International Nuclear Atlantic Conference - INAC 2011 Belo Horizonte,MG, Brazil, October 24-28, 2011 ASSOCIAÇÃO BRASILEIRA DE ENERGIA NUCLEAR - ABEN ISBN: 978-85-99141-04-5 INDOOR RADON MEASUREMENTS IN DWELLINGS AND WORKPLACES OF CURITIBA URBAN AREA (BRAZIL) Flávia Del Claro1, Sergei A. Paschuk1, Janine N. Corrêa1, Zildete Rocha2, Jaqueline Kappke1, Allan F. N. Perna1, Hugo R. Schelin1, Talita O. Santos2 1 Universidade Tecnológica Federal do Paraná Av. Sete de Setembro, 3165 80230-901 Curitiba, PR
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[email protected] ABSTRACT Considering that radon and its progeny exposure is proved to be the main cause of lung cancer among non- smokers and occupation-time at some commercial establishments and workplaces is equal or even bigger then at domiciles and dwelling, present study has been spread to the constructed closed environment and workplaces of commerce and productive sector. The measurements were performed by the Laboratory of Applied Nuclear Physics of UTFPR in 2009 - 2011 when 120 detectors were installed at domiciles and workplaces of Curitiba, Paraná St., Brazil. Experimental setup was based at CR-39 detectors that were installed in diffusion chambers protected with filters. In collaboration with CDTN/CNEN it was performed the calibration of CR-39 detectors at the NIRS in Japan. The exposure time was set to be of 100 days. Alpha particle track development was performed using 6.25M sodium hydroxide (NaOH) solution and ethanol (2%) during 14 hours at 70°C.