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CONTRIBUTION OF THORON AND PROGENY TOWARDS INHALATION DOSE IN A THORIUM ABUNDANT BEACH ENVIRONMENT.
Visnuprasad, A K; Jaikrishnan, G; Sahoo, B K; Pereira, C E; Jojo, P J.
Afiliación
  • Visnuprasad AK; Department of Physics, Fatima Mata National College, Kollam, India.
  • Jaikrishnan G; Low Level Radiation Research Laboratory, Bhabha Atomic Research Centre, Kollam, India.
  • Sahoo BK; Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Kollam, India.
  • Pereira CE; Department of Physics, Fatima Mata National College, Kollam, India.
  • Jojo PJ; Department of Physics, Fatima Mata National College, Kollam, India.
Radiat Prot Dosimetry ; 178(4): 405-413, 2018 Mar 01.
Article en En | MEDLINE | ID: mdl-28981889
In an environment having thorium rich soil the activity concentration of thoron in soil gas and ground-level outside air is comparable to that to radon. Recent reports indicate that in terms of the energy of the alpha particle decays of thoron's progeny, its concentration in indoor air is significant, typically about half that due to radon progeny. We made a detailed radiometric profiling of inhalation dose to the population of the high background radiation area in the west southern coastal region of India. Here we report the results obtained from the long-term time integrated passive measurements of radon, thoron and their progeny concentrations in the high background radiation areas of Chavara and Neendakara hamlets of Kollam district. The equilibrium factors of radon and thoron with their progeny were determined for the region and was consistent with a previous study. The estimated value of total annual inhalation dose in the region ranged from 0.4 ± 0.06 to 3.7 ± 0.6 mSv y-1. The annual effective dose due to thoron and thoron progeny contributes ~35% to the total inhalation dose which means that thoron and its progeny is significant in assessing the radiation dose to the public.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Playas / Monitoreo de Radiación / Torio / Exposición por Inhalación / Contaminantes Radiactivos del Aire Límite: Humans País/Región como asunto: Asia Idioma: En Revista: Radiat Prot Dosimetry Año: 2018 Tipo del documento: Article País de afiliación: India Pais de publicación: Reino Unido
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Playas / Monitoreo de Radiación / Torio / Exposición por Inhalación / Contaminantes Radiactivos del Aire Límite: Humans País/Región como asunto: Asia Idioma: En Revista: Radiat Prot Dosimetry Año: 2018 Tipo del documento: Article País de afiliación: India Pais de publicación: Reino Unido