| Penulis/Author |
LUQMAN HASAN NAHARI (1) ; AKHMAD SUMARNO (2); ATSILLA KHALISA DEWI (3); HADI H NABABAN (4); Dr. Ir. Andang Widi Harto, M.T., IPU., ASEAN Eng. (5); Dr. Ing. Ir. Sihana, IPU. (6); Dr. Ir. Alexander Agung, S.T., M.Sc., IPU. (7) |
| Abstrak/Abstract |
The development of microreactor technology can meet the energy needs of specific regions of Indonesia’s underdeveloped,
foremost, and outermost areas. One of the latest microreactor designs is the Indonesia Micro
Reactor (IMR-13), which has seed and blanket fuel and 5MWt power generation. The IMR-13 reactor has
characteristic design features for operation for as many as ten years without refuelling. The reactor core comprises
integral fuel elements consisting of a heat pipe, fuel matrix, fuel cladding, and graphite moderator. There
are two fuel element types: seed fuel elements with 19.75 % low-enriched uranium oxide and blanket fuel elements
with thorium oxide – graphite reflectors on the bottom, sides, and top surround the reactor core. Side
reflectors have moving parts that function to regulate reactor power. There are no active components in this
reactor. Heat transfer occurs by natural circulation in the heat pipe to the molten salt pool and then from the
molten salt pool to the steam generator. This research focuses on the neutronic aspect of the reactor, particularly
in calculating the seed and blanket ratio to allow the reactor to operate for ten years with minimal power peaking
factor. The selected variant model has 979 seeds and 294 blankets. The variation model has a value of excess
reactivity at the beginning of the life of 937 pcm. Each value of the shutdown margin for system first and system
second sequentially is 3020 pcm and 2994 pcm. The temperature reactivity coefficient is negative, implying
inherent safety. At the end of life, the burnup value was achieved at 4.97 GWd/MTU with an excess reactivity of
271 pcm. A parameter analysis of the burnup characteristics will follow in the selected variant model. The parameters
examined were the core power distribution, delayed neutrons, the fast fission factor, conversion ratio,
and decay heat. |
