A REPORT OF RADIATION RISKS DURING AND AFTER PROCESSING MINERAL PLACER FROM SOUTHEAST AFRICA.,Radiation Protection Dosimetry

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A REPORT OF RADIATION RISKS DURING AND AFTER PROCESSING MINERAL PLACER FROM SOUTHEAST AFRICA.
Radiation Protection Dosimetry ( IF 0.8 ) Pub Date : 2020-04-22 , DOI: 10.1093/rpd/ncaa037
Kan Fu ₁ , Wei Zou _{1,

2} , Zhenzhou Liu _{1,

3} , Haiming He ₄

Affiliation

Recently, high levels of radioactivity were found in products from Chinese mineral processing industries that handle mineral placer from Southeast Africa. The findings led to public panic. The aim of this work is to provide radiological data for the government, workers and the public. In this work, activity concentrations of ²³⁸U,²³²Th,²²⁶Ra and⁴⁰ K in raw ore from Southeast Africa were analysed in the laboratory. Products like monazite and building material were analysed. High concentrations of ²³⁸U,²³² Th and ²²⁶Ra in products were found to be at a level of 10⁴ Bq/kg. Around the South China Mineral Processing Industry, radioactivity in soil and groundwater was analysed. Absorbed dose rates in air and indoor radon concentrations at workplaces were monitored. Annual effective dose to workers and the public was calculated and found to exceed Chinese dose criterion. This report might be an alert for mining and mineral processing in Southeast Africa.

更新日期：2020-04-22

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