[2B01-05] Light Water Reactor Behavior Under Accident Conditions 2

[2B02] Analysis of MCCI phenomena by MELCOR and SAMPSON codes

(2)Simulation of the phenomena by use of MELCOR and SAMPSON codes

*Koetsu Ito¹, Masashi Himi¹, Yoshihiro Ide¹, Hidetoshi Morita¹, Kohichi Nakamura² (1. Advancesoft Corp., 2. CRIEPI)

Keywords:severe accident, VULCANO tests, corium-concrete interaction, debris spreading, viscosity

Viscosity is an important parameter for debris spreading in the early stage of the process in which fuel debris drops from the pressure vessel to the cavity and interacts with the concrete floor (MCCI), which affects subsequent phenomenon progression. We analyzed the flow behavior test of two - dimensional expansion of corium and analyzed the code to extract problems.