A CFD analysis of thermal behaviour of transportation cask under fire test conditions

Spent fuel transportation cask under accidental fire conditions: Numerical analysis of gas transport phenomena affecting heat transfer in shielding materials

“…More specifically, thermal analyses 3 are conducted in order to simulate the exposition of the cask to an accidental engulfing fire characterized by a radiative source at 800°C emitting for a time span of 30 minutes and to evaluate the maximum temperatures reached inside the cask as well as the heating kinetics. Such numerical simulations are usually performed on the basis of a 2D model of a transversal section (Bajwa, 2002) or a 3D model of the whole packaging (Bajwa et al, 2004), (Lo Frano et al, 2011), (Lo Frano et al, 2014), (Pugliese et al, 2010), with radiation boundary conditions to represent the heat flux exchanged between the fire and the cask, heat conduction in the solid parts of the system, in some cases partial melting of the content (Sanyal et al, 2011), or convection (natural or/and forced if a ventilation system is involved, mainly for storage casks (Alyokhina, 2018)) in the air volumes. Equivalence methods can be used to represent the complex multilayer structure of the cask wall and contents (including air gaps) (Xu et al, 2013), (Alyokhina and Kostikov, 2014).…”

A coupled thermal-drop impact analysis-based safety assessment of radioactive material cask

“…Bajwa and Rockville (2002) analyzed the thermal behavior of a cask under severe fire accident conditions. Sanyal et al (2011) carried out a comprehensive computational fluid dynamics analysis of the thermal behavior of melting of the lead under high Rayleigh number convection during the fire test, and investigated the substantial influence of natural convection on the thermal state and melting behavior of the lead. Miles et al (2010) analyzed the influence of the cask's surface on the thermal behavior of the cask.…”

Cooling Process Analysis of a 5-Drum System for Radioactive Waste Processing

“…Conjugate heat transfer coupled with thermal radiation was modelled, and simulation results were used to verify whether the design fulfills the thermal requirements and the temperature limitation of the structure materials. Sanyal et al [30] performed a CFD thermal design of a transportation cask under fire scenarios, in order to verify the compliance with the guidelines of regulatory bodies. Bullard et al [31] proposed a new transport cask design, and temperature profiles were determined by two dimensional CFD simulations of conduction, convection, and radiation within the cask.…”