8-12 July 2013
Africa/Johannesburg timezone
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Radiometric Survey at A Heavy Mineral Mining Company On The West Coast Of South Africa

Presented by Mr. Alfred Mogotsi SEHONE on 10 Jul 2013 from 17:40 to 18:40
Type: Poster Presentation
Session: Poster2
Track: Track B - Nuclear, Particle and Radiation Physics


Heavy mineral sands are mined along our West Coast to produce, amongst others, titanium dioxide feedstock, zircon, rutile and high purity iron products. These products are used in applications including metal, ceramics and foundry production. The mined sands have relatively high levels of NORM (naturally occurring radioactive material). During the process of extracting minerals from the sands, tailings rich in TENORM (Technologically enhances NORM) are generated. Such mining operation therefore requires the on-site monitoring of ionizing radiation and the estimation of doses to critical groups. Here we present our first results from a radiometric survey at the heavy minerals separation plant. The survey was conducted using two in-situ measurement systems, namely a hand-held gamma-ray detector (RS-230 Super-SPEC using a bismuth germinate scintillator) and a MEDUSA (Multi-Element Detector for Underwater Sediment Activity) system (using a cesium iodide scintillator). Each system is linked to a GPS device to allow spatial radiometric mapping. We present a comparison of results from the two systems and results from a laboratory-based radiometric analysis of tailings samples.






Dr. N.M. Jacobs (noel@ma2.sun.ac.za) Military Academy, Faculty of Military Science, Stellenbosch University



Primary authors