Analysis on Reactor Criticality Condition and Fuel Conversion Capability Based on Different Loaded Plutonium Composition in FBR Core

International Conference on Advances in Nuclear Science and Engineering 2015

Permana, Sidik^1 ; Saputra, Geby^1 ; Suzuki, Mitsutoshi^2 ; Saito, Masaki^3

Nuclear Physics and Bio Physics Research Group, Bandung Institute of Technology, Gedung Fisika, Jl. Ganesha 10, Bandung

40132, Indonesia^1

Department of Science and Technology for Nuclear Material Management (STNM), Japan Atomic Energy Agency (JAEA), 2-4 Shirane, Shirakata, Tokai Mura, Naka- gun

Ibaraki

319-1195, Japan^2

Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro-ku

152-8550, Japan^3

关键词: Criticality condition;    Fast breeder reactors;    Fertile materials;    Fissile materials;    Fuel compositions;    Light water reactor (LWR);    Plutonium isotopes;    Spent nuclear fuels;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/799/1/012026/pdf
DOI  :  10.1088/1742-6596/799/1/012026

来源: IOP

【 摘 要 】

Reactor criticality condition and fuel conversion capability are depending on the fuel arrangement schemes, reactor core geometry and fuel burnup process as well as the effect of different fuel cycle and fuel composition. Criticality condition of reactor core and breeding ratio capability have been investigated in this present study based on fast breeder reactor (FBR) type for different loaded fuel compositions of plutonium in the fuel core regions. Loaded fuel of Plutonium compositions are based on spent nuclear fuel (SNF) of light water reactor (LWR) for different fuel burnup process and cooling time conditions of the reactors. Obtained results show that different initial fuels of plutonium gives a significant chance in criticality conditions and fuel conversion capability. Loaded plutonium based on higher burnup process gives a reduction value of criticality condition or less excess reactivity. It also obtains more fuel breeding ratio capability or more breeding gain. Some loaded plutonium based on longer cooling time of LWR gives less excess reactivity and in the same time, it gives higher breeding ratio capability of the reactors. More composition of even mass plutonium isotopes gives more absorption neutron which affects to decresing criticality or less excess reactivity in the core. Similar condition that more absorption neutron by fertile material or even mass plutonium will produce more fissile material or odd mass plutonium isotopes to increase the breeding gain of the reactor.