Cálculo de blindaje para el acelerador lineal monoenergético del Instituto de Cáncer SOLCA Núcleo de Loja

Abstract

This work describes the basic fundamentals of radiation physics, basic concepts of the structure of the Clinical Linear Accelerator (LINAC) and the main existing protocols for the calculation of high energy photon shielding in order to calculate the shielding for the bunker that will house the Monoenergetic Linear Accelerator of SOLCA NUCLEO DE LOJA, This was done in compliance with the Safety and Radiological Protection requirements established by the Competent Authority of Ecuador "SCAN" and the characteristics required for the installation of the equipment. For the calculation of the shielding thickness of the walls of the labyrinth installation, the recommendations of international organizations such as AAPM, CSN, IAEA and NCRP in their reports No. 49, 51, 151 and parameters such as planned workload, treatment techniques, occupancy and use factors, adjacent areas, and the design of the facility provided by the authorities of SOLCA- LOJA, Excel spreadsheets were used to systematize the variables and parameters and verify the results manually in order to speed up the process. The calculation of the thickness of the shielding of walls, floor, ceiling, labyrinth was made for concrete of density 2.35 g.cm-3 and the door for lead sheets of density 11.35 g cm-3. The application of these results is recommended because it has a great similarity with the values recommended by the manufacturer and because the equivalent dose outside these is within the permissible values established in Ecuador, being for controlled areas 0.4 mSv/sem and for uncontrolled areas 0.02 mSv/sem.