• Prof.  N. NAGAIAH
  • Prof. N. NAGAIAH
  • Bangalore University, India
  • Title: RADON – ITS PRESENCE, DETECTION, DEPENDENCE & EFFECTS
  • Abstract:

    Our World is radioactive and has been since it was created.  Everyone on this planet is exposed to the radioactive nuclides (whose concentration vary from place to place) in a number of ways ie…, through water, air and soil. It has been established that, the average annual radiation dose that the World population receive from the natural sources of radiation is about 2.4mSv (UNSCEAR, 2000) out of which about 55% is only due to the Radon and its progeny. Radon-222 and its decay products are proved to be carcinogens. When inhaled, some radon and most of its decay products remain in the lungs and undergo radioactive decay.  The radiation, mainly the alpha released during this process interacts with the lung tissues and results in the damage of the lungs. Apart from the radiation hazards, radon is also used as a tracer for measuring residence time and velocity of flowing water through soil, turbulent transport in the atmosphere and gas transport properties in the soil. Structural changes in the soil during and after logging operations can be studied by radon exhalation technique. High exhalation of radon from soil generally helps in finding deposits of uranium and other materials in the area.

    Since radon contributes largest fraction of natural radiation dose to the population, the distribution of radon in soil, water & air has been given importance and therefore monitoring its concentration is of fundamental for radiation protection.

    In view of this, studies have been conducted in the environment of Bangalore, India continuously for more than two years on Radon & its progeny measurements in air (Indoor & Outdoor) using LLRDS, SSNTD & Filter paper method and its dependence on various factors like temperature, humidity, ventilation rate, flooring type & with respect to height. The results obtained in the study will be dealt in detail. In addition, some new studies on inhalation dose measurements with respect to physical activity level of the public have been conducted for the first time and found interesting results which will also be discussed.

  • Biography:

    Dr. N. Nagaiah obtained his B.Sc (1990) & M.Sc in Physics (1992) from University of Mysore. He then joined as a JRF to work under the AERB sponsored project to Prof. P. Venkataramaiah, Former vice chancellor of Kuvempu University, Karnataka, India in the year 1991 and obtained Ph.D degree from the same university during 1996 in the field of “Environmental Radioactivity”.

    He has served as a lecturer in Physics for 6 years in Government first grade colleges, Department of Collegiate Education, Karnataka, India. He was then appointed by Kuvempu University as a lecturer in physics in the year 1998 and served up to March 2003. Later, Joined Bangalore University in March 2003 as a Reader in Physics and has been working as Associate Professor in the branch of Nuclear Physics. He has nearly 22 years of teaching & 22+ years of research experience. He is the Life member of Indian Physics Association and Indian society for Radiation Physics (ISRP).
    He has been guiding several students towards their Ph.D & M.Phil degrees in Bangalore University, India. He has brought about more than 50 publications, published as research papers in National & International Journals and part of Conference Proceedings and also attended several National &International Conferences. One of his Research paper entitled “Radon daughters’ concentration in air and exposure of joggers at the university campus of Bangalore, India”, published in the journal, Isotopes in environmental and health studies. (G. V. Ashok, N. Nagaiahand N. G. Shiva Prasad) Vol. 44(3), (2008)pp325-333 was placed in the First position among the top 50 Biomedical research articles surveyed from 2006-2011 by MEDLINE, A Database of the US National Library of Medicine. Currently he has two ongoing major research projects funded by BRNS & UGC.
    Areas of Expertise:
    1.  Environmental Radioactivity
    Studies on Radon, Gamma activity of soil samples, waterborne radioactivity & Radiation levels in granite quarries
    2.   Polymer composites
    Radiation shielding, Thermal degradation, Mechanical properties & Irradiation studies
    3. Atmospheric electrical conductivity In relation to Radon daughter’s concentration & aerosols.

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Important Dates
Conference:
August 26-28, 2014
Paper or Abstract Submission Due:
July 9, 2014
Early Bird Registration due for Accepted Paper or Abstract: 10 days after acceptance notification
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