Evaluation of X-ray spectra transmitted by different concrete compositions

Author(s)

Costa, P. R. ^[1] ; Vieira, D. V. ^[1] ; Naccache, V. K. ^[2] ; Ferreira, K. R. ^[2] ; Priszkulnik, S. ^[2]

Affiliation

^[1] Univ Sao Paulo, Inst Fis, Dept Fis Nucl, BR-09500900 Sao Paulo, SP - Brazil

^[2] Univ Mackenzie, Dept Engn, Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: Radiation Physics and Chemistry; v. 116, p. 349-354, NOV 2015.
• Web of Science Citations: 4

Abstract

Additional shielding material must frequently be incorporated to medical facilities in order to comply with radiation protection requirements when using radiation sources. Typical materials for shielding walls, floor and ceiling are the lead, concrete and barite. In the present work, a group of four concrete compositions was evaluated by using broad beam transmission curves and transmitted spectra in the range of X-ray energies used for diagnostic imaging. The studied concretes were classified as ordinary concrete (Type C), concrete with addition of hematite (Types H-1 and H-2) and concrete with addition of steel grit (Type S). Concrete with steel grit shows be more efficient as shielding material of the three heavy types concrete studied. The two mixes of concrete and hematite are practically equivalent from the radioprotection point of view. However, the granulation difference between them might be important to other fields, as shielding is not the only function of concrete in the building structure. Although they are not as efficient as concrete with steel grit, they may be a shielding option in a facility with low shielding requirement. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 10/12237-7 - Experimento evaluation of the relation between air-Kerma and ambient equivalent dose for shielding calculation in adult and pediatric X-ray rooms
• Grantee: Paulo Roberto Costa
• Support Opportunities: Regular Research Grants