Open AccessInvestigation of different numerical schemes for simulating melt motion on the surface of fuel pin
Author(s) -
V. I. Chuhno,
А. А. Бутов,
E. V. Usov
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1268/1/012075
Subject(s) - mechanics , equations of motion , coolant , nuclear power plant , nuclear reactor , mechanical engineering , physics , nuclear engineering , engineering , classical mechanics , nuclear physics
Simulation of severe accident in nuclear reactor is a key element in a safety analysis of nuclear power plants. The goal of presented paper is development of models for fuel pins melting. A detailed description of the system of equations, to simulate melt motion along fuel pin, is presented in the current paper. The system consists of mass, energy and momentum conservation equations. An analysis of hyperbolicity and stability of this system of equations is carried out. Relocation of the melt depends on the balance of the gravitational forces, friction forces between melt and surface of the fuel pins and friction between melt and coolant. The analysis of stability is made with help of Fourier transform. Up-wind scheme, MLU and MUSCL schemes are used to simulate melt motion.