Open AccessThermal-hydraulic behavior of physical quantities at critical velocities in a nuclear research reactor core channel using plate type fuel
Author(s) -
Ali Kamel Sidi,
Zaki Boudali,
Rachid Salhi
Publication year - 2012
Publication title -
nuclear technology and radiation protection
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 16
eISSN - 1452-8185
pISSN - 1451-3994
DOI - 10.2298/ntrp1203229s
Subject(s) - coolant , thermal hydraulics , mechanics , nuclear reactor core , critical ionization velocity , critical heat flux , heat flux , materials science , nuclear reactor , cladding (metalworking) , research reactor , flow velocity , thermal , nuclear fuel , thermodynamics , nuclear engineering , flow (mathematics) , heat transfer , physics , nuclear physics , engineering , composite material , neutron
The thermal-hydraulic study presented here relates to a channel of a nuclear reactor core. This channel is defined as being the space between two fuel plates where a coolant fluid flows. The flow velocity of this coolant should not generate vibrations in fuel plates. The aim of this study is to know the distribution of the temperature in the fuel plates, in the cladding and in the coolant fluid at the critical velocities of Miller, of Wambsganss, and of Cekirge and Ural. The velocity expressions given by these authors are function of the geometry of the fuel plate, the mechanical characteristics of the fuel plate’s material and the thermal characteristics of the coolant fluid. The thermal-hydraulic study is made under steady-state; the equation set-up of the thermal problem is made according to El Wakil and to Delhaye. Once the equation set-up is validated, the three critical velocities are calculated and then used in the calculations of the different temperature profiles. The average heat flux and the critical heat flux are evaluated for each critical velocity and their ratio reported. The recommended critical velocity to be used in nuclear channel calculations is that of Wambsganss. The mathematical model used is more precise and all the physical quantities, when using this critical velocity, stay in safe margins