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Abstract
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Article Information:
Biological Shielding Design Effectiveness of the Brachytherapy Unit at the Korle Bu Teaching Hospital in Ghana Using Mcnp5 Monte Carlo Code
C.C. Arwui, E.O. Darko, P. Deatanyah, S. Wotorchi-Gordon, H. Lawluvi, D.O. Kpeglo and G. Emi-Reynolds
Corresponding Author: Cyrus Cyril Arwui
Submitted: 2011 March, 21
Accepted: 2011 April, 30
Published: 2011 May, 25 |
Abstract:
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Design objectives for brachytherapy treatment facilities require sufficient shielding to reduce primary
and scatter radiation to design limit in order to limit exposure to patients, staff and the general public. The
primary aim of this study is to verify whether shielding of the brachytherapy unit at the Korle Bu teaching
Hospital in Ghana provides adequate protection in order to assess any radiological health and safety impact and
also test the suitability of other available sources. The study evaluates the effectiveness of the biological
shielding design of a Cs-137 brachytherapy unit at the Korle-Bu Teaching Hospital in Ghana using MCNP5.
The facility was modeled based on the design specifications for LDR Cs-137, MDR Cs-137, HDR Co-60 and
HDR Ir-192 treatment modalities. The estimated dose rate ranged from (0.01-0.15) μSv/h and (0.37-3.05) μSv/h
for the existing initial and decayed activities of LDR Cs-137 for the public and controlled areas respectively,
(0.03-0.57) μSv/h and (1.53-8.06) μSv/h for MDR Cs-137, (7.47-59.46) μSv/h and (144.87-178.74) μSv/h for
HDR Co- 60, (0.13-6.95) μSv/h and (19.47-242.98) μSv/h for HDR Ir-192 for the public and controlled areas
respectively. The results were verified by dose rates measurement for the current LDR setup at the
Brachytherapy unit and agreed quiet well. It was also compared with the reference values of 0.5 μSv/h for
public areas and 7.5 μSv/h for controlled areas respectively. It can be concluded that the shielding is adequate
for the existing source.
Key words: Computer codes and modeling, dose equivalent, effective dose, shielding, , ,
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Cite this Reference:
C.C. Arwui, E.O. Darko, P. Deatanyah, S. Wotorchi-Gordon, H. Lawluvi, D.O. Kpeglo and G. Emi-Reynolds, . Biological Shielding Design Effectiveness of the Brachytherapy Unit at the Korle Bu Teaching Hospital in Ghana Using Mcnp5 Monte Carlo Code. Research Journal of Applied Sciences, Engineering and Technology, (05): 426-433.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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