Three-Dimensional Multi-Fluid Analysis of Reactor Components

Abstract

The paper discusses a repertoire of three-dimensional computer programs that have been developed to perform critical analysis of single-phase, two-phase and multi-fluid flow in reactor components. The basic numerical approach to solving the governing equations common to all the codes is presented and the additional constitutive relationships required for closure in particular applications are discussed. Particular applications are presented for the following computer codes: ASSERT Three-dimensional two-fluid analysis of flow and phase distribution in reactor fuel bundles; application to CANDU and MAPLE reactors. THIRST Three-dimensional analysis of flow and phase distribution in steam generators; application to steam generators in clean and fouled conditions. SPOC Three-dimensional analysis of steam, water and air distribution in power plant conditions; app1:cation to design of tube banks. FAITH Three-dimensional two-fluid analysis of two-component flow in ducts and vessels; application to flows in bends and through broach plates. FLOW3D Three-dimensional analysis of flow in arbitrary geometries; application to flow in pool reactors. THIRST/ SLUDGE Three-dimensional analysis of transport, deposition and entrainment of particulate matter (fouling) in steam generators. The paper closes with a discussion on how the principles of FAITH and r THIRST/SLUDGE could be utilised to model fouling of broach-plates in steam generators.