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Radiation Protection Dosimetry Advance Access originally published online on March 6, 2008
Radiation Protection Dosimetry 2008 130(3):385-388; doi:10.1093/rpd/ncn053
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© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Measurement of natural radioactivity in beach sands from Rizhao bathing beach, China

Xinwei Lu* and Xiaolan Zhang

School of Tourism and Environment, Shaanxi Normal University, Xi'an 710062, People's Republic of China

* Corresponding author: luxinwei{at}snnu.edu.cn

Received October 19, 2007, amended December 16, 2007, accepted January 12, 2008

The natural radioactivity of 226Ra, 232Th and 40K was determined for beach sand samples collected from Rizhao bathing beach, China, using gamma ray spectrometry. The measured activity in beach sand ranges from 7.6 to 17.2, 7.8 to 25.1 and 883.4 to 1313.6 Bq kg–1 for 226Ra, 232Th and 40K with mean values of 12.0, 15.2 and 1079.2 Bq kg–1, respectively. The activity concentrations of 226Ra and 232Th in beach sands are lower, while 40K is higher than the world average. The radium equivalent activity in all beach sand samples is lower than the safe limit set in the OECD report (370 Bq kg–1). The values of the external hazard index are less than unity. The mean outdoor air absorbed dose rate is 59.8 nGy h–1 and the corresponding outdoor effective dose rate is 0.073 mSv y–1.


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