Sodium Fire Collaborative Study Progress CNWG Fiscal Year 2021

Abstract

This report discusses the progress on the collaboration between Sandia National Laboratories (Sandia) and Japan Atomic Energy Agency (JAEA) on the sodium fire research in fiscal year (FY) 20 21 and is a continuation of the FY 2020 progress report. In this report, we only report the changes made to the current sodium pool fire model in MELCOR . We modified and corrected many control functions to enhance the current model from the FY2020 report . This year?s enhancements relate to better agreement of th e suspended aerosol measurement from JAEA?s F7 series tests . S taff from Sandia and JAEA conducted the validation stud ies of the sodium pool fire model in MELCOR . To validate this pool fire model with the latest enhancement , JAEA sodium pool fire experiment s (F7 - 1 and F7 - 2 ) were used . The r esults of the calculation , including the code - to - code comparisons are discussed as well as suggestions for further model improvement . Finally, recommendations are made for new MELCOR simulations for FY 202 2 .