Toward a Cfd - Grade Database Addressing Lwr Containment Phenomena
نویسندگان
چکیده
The large-scale, multi-compartment PANDA facility (located at PSI in Switzerland) is one of the stateof-the-art facilities which is continuously upgraded to progressively match the requirements of CFD-grade experiments. Within the OECD/SETH projects, the PANDA facility has been used for the creation of an experimental database on basic containment phenomena e.g. gas mixing, transport, stratification, condensation. In the PANDA tests, these phenomena are driven by large scale plumes or jets. In the paper a selection of the SETH PANDA experimental results is presented. Examples of analytical activities performed at PSI using the GOTHIC, CFX-4 and CFX-5 codes will be used to illustrate how the spatial and temporal resolutions for the measurement grid in PANDA tests are adequate for CFD code assessment and validation purposes.
منابع مشابه
Validation of Cfd for Containment Jet Flows including Condensation
The advanced validation of a CFD code for containment applications requires the investigation of water steam in the different flow types like jets or buoyant plumes. This paper addresses therefore the simulation of two “HYJET” experiments from the former Battelle Model Containment by CFX. These experiments involve jet releases into the multi-compartment geometry of the test facility accompanied...
متن کاملValidation of a Simple Condensation Model for Simulation of Gas Distributions in Containments with Cfx
In cooperation with other institutions, GRS adapts and validates the CFX code developed by ANSYS for LWR containment applications. In a severe accident scenario in a LWR large amounts of steam and hydrogen are released into the containment at different locations. To simulate the main phenomena relevant for accident scenarios within LWR containments models, especially the ones provided to CFX by...
متن کاملOn the Importance of Validation When Using Commercial Cfd Codes in Nuclear Reactor Safety
In this validation work two turbulence models (k-ε and SST model) and two grids (a finer hybrid grid and a tetrahedral coarser grid) are considered in order to model helium release and dispersion. Simulation results are compared against an experiment of jet release phenomena in the Battelle Model Containment facility (BMC), a multi-compartment facility with a total volume of about 560 m. In the...
متن کاملPrediction of Light Gas Distribution in Containment Experimental Facilities Using Cfx4 Code: Jozef Stefan Institute Experience
Two and three-dimensional simulations of experiments on atmosphere mixing and stratification in a nuclear power plant containment were performed with the code CFX4.4, with the inclusion of simple models for steam condensation. The purpose was to assess the applicability of the approach to simulate the behaviour of light gases in containments at accident conditions. The comparisons of experiment...
متن کاملWORKSHOP ON AEROSOL BEHAVIOUR AND THERMAL- HYDRAULICS IN THE CONTAINMENT Organized by OECDNUCLEARENERGYAGENCY in collaboration with COMMISSION OF THE EUROPEAN COMMUNITIES and COMMISSARIAT A L'ENERGIE ATOMIQUE
Humid conditions are expected in the containment during severe LWR accidents. In these conditions steam can condense on the containment structures and on existing aerosol particles or new particles may be formed by water vapor nucleation. In this paper the relative importance of each of these phenomena is evaluated. A mechanistic approach (NAUA-HYGRDS code) by solving the aerosol General Dynami...
متن کامل