DESIGN STUDY OF 30 MWt LONG LIFE HIGH TEMPERATURE GAS COOLED REACTOR (HTGR) WITH THORIUM CARBIDE FUELS

• Main Author: MIFTASANI (NIM : 20212031); Pembimbing : Prof. Dr. Eng. Zaki Su'ud, FITRIA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/20111
• Institution: Institut Teknologi Bandung

There are two type of HTGR in general: pebble type and prismatic type. In this study small long life high temperature gas cooled reactors with power level of 30 MWt has been investigated based on thorium cycle carbide fuels. The usage of thorium cycle give better internal conversion ratio in the thermal energy spectrum so that it can be operated for longer life with reasonable maximum excess reactivity. The output coolant temperature is 950˚C with inlet temperature is 450˚C. Variation of U-233 percentage in the fuel is set between 2-7 %. The first criticality was achieved when the reactor core reactor was first filled by 18 columns of fuel, with effective multiplication factor 1.05059 and 0.04815 excess reactivity. But this reactor become sub-critical reactor in the fifth year. HTGR 30 MWt can maintain the value of k-eff > 1 for seven years without experiencing sub-critical is achieved at fuel filling column 21-30. Calculation of the power distribution in the reactor core focus with 21, 24, and 30 columns of fuel at the time beginning of life as well as analysis of the state of the reactor core during operation with a burn-up period of 7 years. Reactor cell calculations performed using the SRAC program 2002, and utilize data JENDL3.2 nuclides, including the reactor core calculations using CITATION module by using θ-RZ geometry model.