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All Journal Ganendra: Majalah IPTEK Nuklir Journal of Physics and Its Applications
Rasito Tursinah, Rasito
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Astronomy Computer Science & IT Earth & Planetary Sciences Materials Science & Nanotechnology Physics Other

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MPS SIMULATION ON THE CORIUM MELT FLOW IN CASE OF REACTOR ACCIDENT Tursinah, Rasito; Variastuti, Marisa; Omega, Rakotovao Lovanantenaina; Mustari, Asril Pramutadi Andi; Permana, Sidik
GANENDRA Majalah IPTEK Nuklir Volume 26 Nomor 2, 2023
Publisher : Website

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/gnd.2023.6829

Abstract

A simulation model has been made for molten corium in a nuclear reactor using the Moving Particle Semi-Implicit (MPS) method. By setting the value of dynamic viscosity and temperature of corium, simulations are carried out to display the pressure profile and flow velocity of the corium fluid that falls from the RPV to the plenum. In the first simulation to observe the pressure and velocity profile of the corium in the plenum, three conditions were made: the plenum was empty; the plenum was filled with corium fluid, and the plenum was filled with debris. The second simulation was carried out to determine the relationship between the time required for corium to reach the plenum for variations in corium viscosity and temperature values. The simulation results show that the increase in corium viscosity will be proportional to the length of time it takes to reach the plenum. In contrast to the effect of temperature where the increase in corium temperature will be the smaller the time required.
Dose Distribution of Pencil Beam Proton Therapy using Geant4 Simulation for Breast Cancer Treatment Budiman, Rizki; Sutanto, Heri; Tursinah, Rasito; Triadyaksa, Pandji
Journal of Physics and Its Applications Vol 7, No 2 (2025): May 2025
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i2.25067

Abstract

This study aims to obtain a Spread-Out Bragg Peak (SOBP) for breast cancer treatment using proton pencil beams Monte Carlo simulation. Proton beams with 2 MeV energy steps from 70 to 110 MeV were simulated using Geant 4 software to generate the SOBP. The optimization tool Linear Least Squares (lsqlin) was used to configure the proper proton beam weighting fraction. This tool successfully produced SOBPs within a depth range of 4-8 cm, 4-6 cm, and 5-7 cm. Comparison against a trial-and-error approach to creating SOBP by a different study shows that Linear Least Squares (lsqlin) approximation leads to a better SOBP.
Co-Authors Budiman, Rizki Heri Sutanto Mustari, Asril Pramutadi Andi Omega, Rakotovao Lovanantenaina Pandji Triadyaksa Sidik, Adi Permana Variastuti, Marisa