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Indoor inhalation dose assessment for thoron-rich regions of Indian Himalayan belt

  • Poonam Semwal
  • Tarun Kumar Agarwal
  • Kuldeep Singh
  • Manish Joshi
  • Gurupad Singh Gusain
  • Bijay Kumar Sahoo
  • Rakesh Chand Ramola
Research Article
  • 93 Downloads

Abstract

222Rn, 220Rn, and their decay products are significant contributors to background radiation dose. Their concentration level, pertaining exposure, and consequent dose are prime concerns in indoor environments. The present study was performed in 101 dwellings of different villages of Almora district situated in Kumaun hills of Indian Himalayan belt. Measurement of gases and decay products were made in three different types of dwellings (i.e., mud, cemented, and stone with plaster) in three seasons (winter, summer, and rainy). Concentration values for 222Rn and EERC were found to be varying in the order of winter > summer > rainy while obtained least in rainy season for the case of 220Rn and EETC. Concentration values for 222Rn and EERC were found to be lesser for cemented houses. Relative standard deviation of concentration values was found to be higher for the rainy season. Yearly averaged concentration values for 222Rn, EERC, 220Rn, and EETC were noted to be higher than the global averages but comparable to some Indian studies. Annual inhalation dose due to 222Rn, 220Rn, and their progeny was found to be 0.55–4.71 mSv/year with an average value of 2.36 ± 0.83 mSv/year. These values were measured for the first time in the study area and provide a link for future studies in the dwellings representing higher concentration values.

Keywords

Radon Thoron EERC EETC Inhalation dose Seasonal variation 

Notes

Funding information

The authors are thankful to the Board of Research in Nuclear Science (BRNS), Department of atomic energy (DAE), Mumbai, India, for providing the funds (project no. 2013/36/61-BRNS) and the facilities for carrying out the research work.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Poonam Semwal
    • 1
  • Tarun Kumar Agarwal
    • 2
  • Kuldeep Singh
    • 1
  • Manish Joshi
    • 2
  • Gurupad Singh Gusain
    • 1
  • Bijay Kumar Sahoo
    • 2
  • Rakesh Chand Ramola
    • 3
  1. 1.Department of PhysicsGovt. P.G. CollegeTehri GarhwalIndia
  2. 2.Radiological Physics and Advisory DivisionBhabha Atomic Research CenterMumbaiIndia
  3. 3.Department of Physics, HNBGarhwal UniversityTehri GarhwalIndia

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