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Descripción
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| Introduction: Compact Proton Therapy Centers (CPTC) is referred to facilities with a single treatment room. The goal of this work is to carry out neutron dosimetry and shielding studies by estimating ambient dose equivalent H*(10) around CPTC facilities, aiming to protect the radiation workers and the public. Experimental measurements will be compared with values obtained with Monte Carlo calculations in order to develop the commissioning of the facility. Methods: H*(10) due to stray neutrons in CPTC was calculated using Monte Carlo methods through MCNP6 code and CAD designs and models. The facility modeled is made up of a superconducting proton accelerator room and a treatment room with a rotating gantry. Several models of the radiation sources and the facility were simulated, starting from the manufacturer?s model, with conservative assumptions, followed by models recently published with more realistic assumptions, and finally by models with more efficient shielding materials against neutron radiation. Experimental measurements will be carried out with extended range rem meters, WENDI-II and LUPIN-II types and conventional detectors. Results: Using the more conservative assumptions a maximum H*(10) value obtained was 0.4 mSv/year around the accelerator room. In models based on more realistic and accurate assumptions, the results are even lower. Absolute responses of extended range REM meters used in the experimental measurements have been previously characterized. Conclusions: The shielding effectiveness against diffuse neutron radiation in CPTC facilities has been verified with MCNP6, using different models, materials and assumptions of radiation source. In any case, results achieved are below internationally accepted dose limits. | |
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Internacional
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Si |
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Nombre congreso
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58th Annual Conference of the Particle Therapy Cooperative Group (PTCOG58 |
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Tipo de participación
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960 |
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Lugar del congreso
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Manchester |
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Revisores
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Si |
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ISBN o ISSN
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CDP08UPM |
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DOI
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10.14338/IJPT.19-PTCOG-6.4 |
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Fecha inicio congreso
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10/06/2019 |
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Fecha fin congreso
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15/06/2019 |
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Desde la página
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402 |
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Hasta la página
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402 |
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Título de las actas
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Proceedings to the 58th Annual Conference of the Particle Therapy Cooperative Group (PTCOG58) 10-15 June 2019 |