A Simple Global View of Fuel Burnup

International Conference on Advances in Nuclear Science and Engineering 2015

Sekimoto, Hiroshi^1

Tokyo Institute of Technology, Japan^1

关键词: Equilibrium equation;    Extreme conditions;    Fuel cycle system;    Governing equations;    Nuclear energy systems;    Nuclear equilibrium state;    Performance indices;    Reactor physics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/799/1/012002/pdf
DOI  :  10.1088/1742-6596/799/1/012002

来源: IOP

【 摘 要 】

Reactor physics and fuel burnup are discussed in order to obtain a simple global view of the effects of nuclear reactor characteristics to fuel cycle system performance. It may provide some idea of free thinking and overall vision, though it is still a small part of nuclear energy system. At the beginning of this lecture, governing equations for nuclear reactors are presented. Since the set of these equations is so big and complicated, it is simplified by imposing some extreme conditions and the nuclear equilibrium equation is derived. Some features of future nuclear equilibrium state are obtained by solving this equation. The contribution of a nucleus charged into reactor core to the system performance indexes such as criticality is worth for understanding the importance of each nuclide. It is called nuclide importance and can be evaluated by using the equations adjoint to the nuclear equilibrium equation. Examples of some importances and their application to criticalily search problem are presented.