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Application of a “Sealed Can Technique” and CR-39 detectors for measuring radon emanation from undamaged granitic ornamental building materials

Published online by Cambridge University Press:  09 January 2012

J. Barescut ,
D. Lariviere ,
T. Stocki ,
A.O. Ferreira ,
B.R.S. Pecequilo  and
R.R. Aquino
A.O. Ferreira
Affiliation:
Environmental Radiometric Division, Instituto de Pesquisas Energéticas e Nucleares, Av. Prof. Lineu Prestes, 2242, Cidade Universitária, 05508-000 São Paulo, SP, Brazil
B.R.S. Pecequilo
Affiliation:
Environmental Radiometric Division, Instituto de Pesquisas Energéticas e Nucleares, Av. Prof. Lineu Prestes, 2242, Cidade Universitária, 05508-000 São Paulo, SP, Brazil
R.R. Aquino
Affiliation:
Environmental Radiometric Division, Instituto de Pesquisas Energéticas e Nucleares, Av. Prof. Lineu Prestes, 2242, Cidade Universitária, 05508-000 São Paulo, SP, Brazil
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Abstract

Radon (222Rn) is the most important cause of exposure to mankind due to natural radioactivity. Radon exhalation depends not only on the 226Ra concentration in the material, but also on other factors such as mineralogy of the region, size and density of grains and porosity of the material. As building materials are one of the major sources of environmental radon, the radiological implications of the use of materials with great content of uranium must be always assessed. In this work, radon exhalation from several undamaged granitic building materials used as ornamental rocks or coating tiles is determined using the “sealed-can technique” and CR-39 solid state nuclear track detectors (SSNTD). Preliminary results for radon concentrations showed values of the same order that literature values, in a range from 99 Bq.m−3 to 1100 Bq m−3. Further, the methodology will be validated with standard sources of 222Rn.

Type
Research Article
Information
Radioprotection , Volume 46 , Issue 6: ICRER 2011 – International Conference on Radioecology & Environmental Radioactivity: Environment & Nuclear Renaissance , 2011 , pp. S49 - S54
Copyright
© Owned by the authors, published by EDP Sciences, 2011

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References

UNSCEAR – United Scientific Committee on the Effects of Atomic Radiation (UNSCEAR), The 1993 Report to the General Assembly with scientific Annexes. New York: United Nations, (1993).
NCRP-97, National Council on Radiation Protection and Measurements, Measurement of radon and radon daughter in air, NCRP-97, (1998).
EISENBUD, M. Environmental Radioactivity. 2nd ed. Academic Press, Orlando, (1987).
PAULO, S. R., Dosimetria ambiental de Rn-222 e filhos: Medida da eficiência absoluta do CR-39 Levando-se em conta os efeitos do Plate-out e fatores ambientais, (1991), Tese de Doutorado, UNICAMP, IFGW, Campinas.
FLEISCHER, R.L., PRICE, P.B., WALKER, R.M. Nuclear Tracks in Solids: Principles and Applications. Univ. of California Press, Berkeley, (1975).
SAKODA, A., HANAMOTO, K., ISHIMORI, Y., KATAOKA, T., KAWABE, A.,YAMAOKA, K. First model of the effect of grain size on radon emanation. Applied Radiation and Isotopes., v. 68(2009) p. 1169–1172.
SEMKKOW, T. M. Recoil-emanation theory applied to radon release from mineral grains. Geochimica et Cosmochimica Acta., vol 54, (1978) p. 425–440.
MORAWSKA, L AND PHILLIPS. Dependence of the radon emanation coefficient on radium distribution and internal struture of the material. Geochimica et Cosmochimica Acta., vol 57, (1993) p. 1783–1797.
FLEISCHER, R. Moisture and 222Rn Emanation. Health Physics., vol 52, (1986), n6, p. 797–799.
KHAN, A. J., RAJENDRA PRASAD, TYAGI, R. K. Measurement of radon exhalation rate from some building materials. Nucl. Tracks Radiat. Meas., Vol. 20, (1992), No. 4, pp. 609–610.
FAHEEM, M., MATIULLAH. Radon exhalation and its dependence on moisture content from samples of soil and building materials. Radiation Measurement., Short communication, (2008).
MAHUR, A.K., KUMAR, R., SONKAWADE, R.G., SENGUPTA, D., PRASAD, R. Measurement of natural radioactivity and radon exhalation rate from rock samples of Jaduguda uranium mines and its radiological implications. Nuclear Instruments and Methods in Physics Research B., v. 266, (2008), p. 1591–1597.
ORLANDO, C. ORLANDO, PATRIZII, P.L, TOMMASINO, L. TONNARINI, L., TREVISI, R. AND VIOLA, P. A passive radon dosimeter suitable for workplaces. Radiat. Prot. Dosim., v. 102 (2002), p. 163–168.
ZEISS, C., KS 100 Imaging System Release 3.0, (1997).
MOURA, C. L., Radioatividade natural e emanação de Rn-222 em rochas ornamentais provenientes de diferentes series magmáticas, (2005), Tese de Doutorado, UNESP Rio Claro, Pós-Graduação em Geologia Regional, Rio Claro.
GUPTA, M., MAHUR, A.K., SONKAWADE, R.G., VERMA, K. D., PRASAD, R. Measurement of radon activity, exhalation rate and radiation doses in fly ash samples fron NTPC Dadri, India. Indian Journal of Pure & Applied Physics, Vol. 48, (2010), pp 520–523.
KOBEISSI, M. A., EL SALMAD, O., ZAHRAMAN, K., MILKY, S., BAHSON, F., ABUMURAD, K. M. Natural radioactivity measurements in building material in Southern Lebanon. Journal of Environmental Radioactivity, Vol. 99, (2008), pp 1279–1288.