Abstract
In order to investigate the effect of sodium combustion, Sandia National Laboratories (SNL) and Japan Atomic Energy Agency (JAEA) have exchanged information of sodium combustion modelling and related experimental data in the framework of Civil Nuclear Energy Research and Development Working Group (CNWG). This collaboration includes a benchmark analysis of the SNL Surtsey spray combustion experiment (SNL T3/T4 experiments) using AQUA-SF and SPHINCS in JAEA and CONTAIN-LMR in SNL. AQUA-SF is a multi-dimensional sodium combustion analysis code, and zone model (lumped mass model) is applied both in SPHINCS and CONTAIN-LMR codes for fast calculation. The benchmark analysis of the SNL T3 sodium spray combustion experiment and sensitivity study have been carried out using the AQUA-SF code in this paper. The sensitivity analysis clarifies the influencing factors of the multi-dimensional analysis such as turbulence models, radiation heat transfer model from sodium droplets, and momentum exchange between gas and droplets. Furthermore, gas temperature and oxygen concentration normalized by spray burning rate are checked in order to study the effect of local gas temperature increase at the spray burning area. The result shows that the turbulence effect and radiation from droplets, and gas temperature increase under the sodium inlet affect sodium spray burning rate significantly.
