Determination of steel and lead bi-laminated shielding for military vehicles

Ary Machado de Azevedo; Domingos D'Oliveira Cardoso; Marcos Paulo Cavaliere de Medeiros; Sergio Gavazza; Rudnei Karam Morales

doi:10.15392/2319-0612.2023.2151

Authors

Ary Machado de Azevedo Instituto Militar de Engenharia
Domingos Cardoso Instituto Militar de Engenharia
Marcos Paulo Medeiros Instituto Militar de Engenharia
Sergio Gavazza Instituto Militar de Engenharia
Rudei Morales Instituto Militar de Engenharia

DOI:

https://doi.org/10.15392/2319-0612.2023.2151

Keywords:

Vehicle CBRN, Shielding of gamma-ray, Factor transmission, Bilaminated shielding, MCNP

Abstract

In the present work, the transmission factors of γ-rays are determined in bi-layered shields composed of lead and steel, through a methodology composed of three distinct parts. The buildup calculation was performed using the methodology published by Broder in 1962 [1]. A computational simulation was used through a spherical model, a total of three concentric spheres were simulated, with the source in the center of the spheres. The first sphere represents the lead shield and its radius is represented by the thickness of this material. The second sphere represents the steel shield and its radius is the sum of the thicknesses of the shielding. The third sphere is the vacuum that will determine the number of photons that will pass. To verify if the analytical methodology can be used to calculate the transmission factor of the proposed shield, laboratory experiments were performed with the BGO (Bismuth Germanate) detector. Measurements were only made with the thickness of steel, and with 15 different thicknesses of lead, ranging from 0.11 cm to 2.01 cm, while keeping the steel thickness. Three different thicknesses of steel were used: 0.65 cm, 0.85 cm and 1.40 cm. The work is relevant in the field of radiological and nuclear defense, considering the application of this shield in military vehicles, and the efficiency of the proposed analytical methodology was demonstrated.

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References

BRODER, D. L.; KAYURIN, Y. P.; KUTUZOV, A. A. Transmission of gamma radiation through heterogeneous media. In: Atomnaya Energlya. [S.l.: s.n.], 1962. pp. 30–35.

HELERBROK, R. " Chernobyl Accident"; Brazil School. Access in: Dec. 22.

Available in: <https://brasilescola.uol.com.br/historia/chernobyl-acidente-nuclear.htm>.

GOIÁS, S. of health of. Cesium 137 Goiânia. Access in: Dec 22. of 2021. Available in: <https://www.saude.go.gov.br/ cesio137goiania>.

RED, O. M. of the beach. Conceptual Topics. 2020. Access in: Dec 22. 2021. Available in: <http://ompv.eceme.eb.mil.br/index.php?option=com_content&view=article&id=165>.

ANGELS, R. R. G. dos. Evolution of tanks in the Brazilian Army. 31 p. Monograph (Graduation in Military Sciences) — Academia Militar das Agulhas Negras, Rio de Janeiro, 2019.

BRUNATTO, S. F. INTRODUCTION TO THE STUDY OF THE ITEMS. Access in: Apr. 21, 2022. Available in: http://ftp.demec.ufpr.br/disciplinas/TM052/Prof.Silvio/INTRODU%C3%87%C3%83O%20AO%20ESTUDO%20DOS%20A%C3%87OS-Parte%204.pdf

NUCLEID.ORG. Library for gamma and alpha emissions. Access in: Dec. 27, 2021. Available in: <http://www.nucleide.org/Laraweb/index.php>.

STANDARDS, N. I. of; LABORATORY, T. P. M. XCOM: Photon Cross Sections Database. Access in: 18 Jun. 2022. Available in: <https://www.nist.gov/pml/xcom-photon-cross-sections-database>.

BRODER, D. L.; KAYURIN, Y. P.; KUTUZOV, A. A. Calculating gamma buildup factors in heterogeneous media. In: Atomnaya Energlya. [S.l.: s.n.], 1962. pp. 593–595.

FODERARO, A. THE FOTON SHIELD MANUAL. 2. ed. Pennsylvania: The Penn state bookstore, 2014. 344 p.

ATTIX, F. H. INTRODUCTION TO RADIOLOGICAL PHYSICS AND RADIATION DOSIMETRY. 3. ed. Wisconsin: Willey-VHC, 1986. 663 p.

SOULFANIDIS, N. MEASURENT AND DETECTION OF RADIATION. 4. ed. Boca Raton: CRC Press, 2015. 515p

KOKTA, L. Determination of peak area. Nuclear Instruments and Methods, v. 112, no. 1, p. 245-251, 1973. ISSN 0029-554X. Available at: <https://www.sciencedirect.com/science/article/pii/0029554X73908033>.