4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=10&confId=86">The Proceedings of SAIP2016</a> published on 24 December 2017

MCNPX based Radiation Shielding Analysis for the Mineral-PET Kimberlite Sorting Facility

6 Jul 2016, 16:10
1h 50m
Kramer Law building

Kramer Law building

UCT Middle Campus Cape Town
Board: F.508
Poster Presentation Track F - Applied Physics Poster Session (2)

Speaker

Mr Eric Chinaka (UJ &amp; NECSA)

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

N/A

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

Radiation shielding analysis and optimization calculations have been performed to design a shield for the mineral-PET (Positron Emission Tomography) facility. PET is a nuclear imaging technique currently used in diagnostic medicine. The technique is based on the detection of 511 keV coincident and co-linear photons produced from the annihilation of a positron (produced by a positron emitter) and a nearby electron. The technique is being developed for the run-of-mine detection of diamonds in Kimberlite rock. In the technique, a 40 MeV electron beam irradiates a bremsstrahlung target, producing a photon beam which irradiates the candidate rock to activate the naturally occurring 12C, thus producing a positron emitter 11C isotope via the photo-nuclear (γ,n) reaction. The resultant high intensity and high energy radiation (including both photons and neutrons) field requires appropriate shielding to protect personnel, equipment and the environment around the facility. Calculations to simulate the radiation field and to optimize the required shielding materials and their geometry were done using a Monte Carlo based radiation transport code, MCNPX-2.70. The optimized shield configuration as well as the associated neutron and photon dose rates on the personnel side of the shield are presented.

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

No

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

Yes

Primary author

Mr Eric Chinaka (UJ &amp; NECSA)

Co-authors

Mr Johann Van Rooyen (Necsa) Prof. Simon Connell (University of Johannesburg)

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