International Journal of Radiation Research

en Cyclotron 30 MeV 1.5 mA shielding design for boron neutron capture therapy Radiation Biology Radiation Biology تحقيق بديع Original Research <div style="text-align: justify;">Background: Effective radiation shielding in Boron Neutron Capture Therapy (BNCT) facilities is essential to protect patients, staff, and the environment from secondary radiation. This study aims to determine the optimal thickness of Portland, boron, and barite concretes for shielding the Beam Shaping Assembly (BSA) in BNCT facilities, ensuring compliance with International Atomic Energy Agency (IAEA) and Indonesia’s BAPETEN (Nuclear Energy Regulatory Agency of Indonesia) safety standards. Materials and Methods: Monte Carlo simulations were performed using the Particle and Heavy Ion Transport Code System (PHITS) to model radiation interactions. The shielding performance of the three concretes was evaluated across five critical areas of the BSA: front, left side, external labyrinth, top, and bottom, utilizing 100,000,000 particles for statistical accuracy. Results: Barite concrete required the least thickness due to its high density and superior photon attenuation, with optimal thicknesses of 0.56 m, 0.4 m, 1.0 m, 0.4 m, and 0.32 m in the respective areas. Boron concrete provided enhanced neutron protection with thicknesses of 0.79 m, 0.35 m, 1.0 m, 0.45 m, and 0.32 m. Portland concrete, while needing greater thickness for gamma shielding, remained cost-effective and accessible with thicknesses of 0.7 m, 0.5 m, 1.0 m, 0.5 m, and 0.37 m. Conclusion: All three concretes met IAEA and BAPETEN safety standards. Barite concrete was most effective for photon attenuation, boron concrete excelled in neutron protection, and Portland concrete offered a practical balance between effectiveness and cost. These findings aid in designing safe and efficient BNCT facilities, especially in resource-limited settings.</div> BNCT, radiation shielding, Monte Carlo simulation, PHITS, concrete materials. 935 943 http://ijrr.com/browse.php?a_code=A-10-1-1418&slc_lang=en&sid=1 A.R.W. Wicaksana 7900319475328460032360 7900319475328460032360 No Department of Nuclear Engineering and Engineering Physics, Faculty of Engineering, Universitas Gadjah Mada, 2 Grafika Street, Yogyakarta 55281, Indonesia A. Muharini 7900319475328460032361 7900319475328460032361 No Department of Nuclear Engineering and Engineering Physics, Faculty of Engineering, Universitas Gadjah Mada, 2 Grafika Street, Yogyakarta 55281, Indonesia Y. Sardjono 7900319475328460032362 7900319475328460032362 No Research Center for Safety, Metrology, and Nuclear Quality Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency Indonesia G.S. Wijaya 7900319475328460032363 7900319475328460032363 No Research Center for Safety, Metrology, and Nuclear Quality Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency Indonesia Z. Ismail 7900319475328460032364 7900319475328460032364 No Research Center for Safety, Metrology, and Nuclear Quality Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency Indonesia I.M. Triatmoko 7900319475328460032365 7900319475328460032365 No Research Center for Safety, Metrology, and Nuclear Quality Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency Indonesia S. Ulya syar015@brin.go.id 7900319475328460032366 7900319475328460032366 Yes Research Center for Safety, Metrology, and Nuclear Quality Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency Indonesia H. Prasetio 7900319475328460032367 7900319475328460032367 No Research Center for Safety, Metrology, and Nuclear Quality Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency Indonesia N. Nuraeni 7900319475328460032368 7900319475328460032368 No Research Center for Safety, Metrology, and Nuclear Quality Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency Indonesia N.R. Hidayati 7900319475328460032369 7900319475328460032369 No Research Center for Safety, Metrology, and Nuclear Quality Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency Indonesia Fendinugroho 7900319475328460032370 7900319475328460032370 No Research Center for Safety, Metrology, and Nuclear Quality Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency Indonesia Y. Kasesaz 7900319475328460032371 7900319475328460032371 No