Analytical tool development for coarse break-up of a molten jet in a deep water pool

Moriyama, Kiyofumi; Nakamura, Hideo; Maruyama, Yu*

Nuclear Engineering and Design, 236(19-21), p.2010 - 2025, 2006/10

https://doi.org/10.1016/j.nucengdes.2006.03.027

A computer code JASMINE-pre was developed for the prediction of premixing conditions of fuel-coolant interactions and the debris bed formation behavior relevant to severe accidents of light water reactors. JASMINE-pre consists of three melt component models: melt jet, melt particles and melt pool, coupled with a two-phase flow model derived from the ACE-3D code developed at JAERI. Simulations of the FARO corium quenching experiments with a saturated water pool and with a subcooled water pool were performed with JASMINE-pre and . JASMINE-pre reproduced the pressurization and fragmentation behaviors observed in the experiments with a reasonable accuracy. The results by pmjet showed qualitatively the same trend with JASMINE-pre in the fragmentation behavior.