NEUTRONIC SIMULATION PROGRAM DEVELOPMENT FOR PEBBLE BED REACTOR BASED ON MONTE CARLO METHOD

• Main Author: Muhammad Majdi, Labib
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/87544
• Institution: Institut Teknologi Bandung

Nuclear reactor is a device used to trigger and control nuclear reaction inside it. Nuclear reactor can be used as an energy source in a power plant. Designing a good nuclear reactor requires a knowledge about neutron distribution in reactor. Neutron distribution can be predicted by using neutron transport equation, but this method is really hard to be solved analytically. One of the alternatives is using Monte Carlo method as it is relatively easy and general. In this research, we made a Python program Sinubel (Simulasi Neutron dalam Pebble, or neutron simulation in pebble) that can solve neutron transport equation and burnup equation using Monte Carlo method, mainly in JEZEBEL and pebble reactor. The result from this simulation is multiplication factor ke f f and neutron fluxes ? in certain time with nuclide composition change in mind. We compare this result from Sinubel with experiment data and other simulation program like OpenMC. Sinubel can simulate neutron in JEZEBEL really well with error about 0.55% against the experiment and neutron fluxes identic with OpenMC’s. Sinubel can also simulate neutron quite well in pebble with error about 4.83% against OpenMC’s. While the neutron fluxes is relatively the same, its peak is more extreme due to Sinubel doesn’t calculate elastic coherent scattering. We hope that Sinubel can simulate neutron in pebble-bed reactor fully with competitive time and accuracy against any other method.