Particle loading as a design parameter for composite radiation shielding
An evaluation of the radiation shielding performance of high-Z-particle-loaded polylactic acid (PLA) composite materials was pursued. Specimens were produced via fused deposition modeling (FDM) using copper-PLA, steel-PLA, and BaSO4-PLA composite filaments containing 82.7, 75.2, and 44.6 wt% particu...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-10-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573322002789 |
| _version_ | 1828236746258644992 |
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| author | N. Baumann K. Marquez Diaz K. Simmons-Potter B.G. Potter, Jr. J. Bucay |
| author_facet | N. Baumann K. Marquez Diaz K. Simmons-Potter B.G. Potter, Jr. J. Bucay |
| author_sort | N. Baumann |
| collection | DOAJ |
| description | An evaluation of the radiation shielding performance of high-Z-particle-loaded polylactic acid (PLA) composite materials was pursued. Specimens were produced via fused deposition modeling (FDM) using copper-PLA, steel-PLA, and BaSO4-PLA composite filaments containing 82.7, 75.2, and 44.6 wt% particulate phase contents, respectively, and were tested under broad-band flash x-ray conditions at the Sandia National Laboratories HERMES III facility. The experimental results for the mass attenuation coefficients of the composites were found to be in good agreement with GEANT4 simulations carried out using the same exposure conditions and an atomistic mixture as a model for the composite materials. Further simulation studies, focusing on the Cu-PLA composite system, were used to explore a shield design parameter space (in this case, defined by Cu-particle loading and shield areal density) to assess performance under both high-energy photon and electron fluxes over an incident energy range of 0.5–15 MeV. Based on these results, a method is proposed that can assist in the visualization and isolation of shield parameter coordinate sets that optimize performance under targeted radiation characteristics (type, energy). For electron flux shielding, an empirical relationship was found between areal density (AD), electron energy (E), composition and performance. In cases where EAD≥2 MeV∙cm∙g−1, a shield composed of >85 wt% Cu results in optimal performance. In contrast, a shield composed of <10 wt% Cu is anticipated to perform best against electron irradiation when EAD<2 MeV∙cm∙g−1. |
| first_indexed | 2024-04-12T20:37:47Z |
| format | Article |
| id | doaj.art-fef450f992654a3b8510d02cb749c825 |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-04-12T20:37:47Z |
| publishDate | 2022-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-fef450f992654a3b8510d02cb749c8252022-12-22T03:17:32ZengElsevierNuclear Engineering and Technology1738-57332022-10-01541038553863Particle loading as a design parameter for composite radiation shieldingN. Baumann0K. Marquez Diaz1K. Simmons-Potter2B.G. Potter, Jr.3J. Bucay4University of Arizona, Tucson, AZ, 85721, USAUniversity of Arizona, Tucson, AZ, 85721, USAUniversity of Arizona, Tucson, AZ, 85721, USAUniversity of Arizona, Tucson, AZ, 85721, USA; Corresponding author.Raytheon Technologies, San Diego, CA, USAAn evaluation of the radiation shielding performance of high-Z-particle-loaded polylactic acid (PLA) composite materials was pursued. Specimens were produced via fused deposition modeling (FDM) using copper-PLA, steel-PLA, and BaSO4-PLA composite filaments containing 82.7, 75.2, and 44.6 wt% particulate phase contents, respectively, and were tested under broad-band flash x-ray conditions at the Sandia National Laboratories HERMES III facility. The experimental results for the mass attenuation coefficients of the composites were found to be in good agreement with GEANT4 simulations carried out using the same exposure conditions and an atomistic mixture as a model for the composite materials. Further simulation studies, focusing on the Cu-PLA composite system, were used to explore a shield design parameter space (in this case, defined by Cu-particle loading and shield areal density) to assess performance under both high-energy photon and electron fluxes over an incident energy range of 0.5–15 MeV. Based on these results, a method is proposed that can assist in the visualization and isolation of shield parameter coordinate sets that optimize performance under targeted radiation characteristics (type, energy). For electron flux shielding, an empirical relationship was found between areal density (AD), electron energy (E), composition and performance. In cases where EAD≥2 MeV∙cm∙g−1, a shield composed of >85 wt% Cu results in optimal performance. In contrast, a shield composed of <10 wt% Cu is anticipated to perform best against electron irradiation when EAD<2 MeV∙cm∙g−1.http://www.sciencedirect.com/science/article/pii/S1738573322002789Radiation shieldingMonte carlo simulationAdditive manufacturingPolymer composite |
| spellingShingle | N. Baumann K. Marquez Diaz K. Simmons-Potter B.G. Potter, Jr. J. Bucay Particle loading as a design parameter for composite radiation shielding Nuclear Engineering and Technology Radiation shielding Monte carlo simulation Additive manufacturing Polymer composite |
| title | Particle loading as a design parameter for composite radiation shielding |
| title_full | Particle loading as a design parameter for composite radiation shielding |
| title_fullStr | Particle loading as a design parameter for composite radiation shielding |
| title_full_unstemmed | Particle loading as a design parameter for composite radiation shielding |
| title_short | Particle loading as a design parameter for composite radiation shielding |
| title_sort | particle loading as a design parameter for composite radiation shielding |
| topic | Radiation shielding Monte carlo simulation Additive manufacturing Polymer composite |
| url | http://www.sciencedirect.com/science/article/pii/S1738573322002789 |
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