[2K16-20] Fukushima Daiichi NPP Accident 2

[2K16] Assessment of Core Status of TEPCO's Fukushima Daiichi Nuclear Power Plants

(82)Assessment of SAMPSON Severe Accident Code Modeling against MELCOR

*Ayumi Itoh¹, Marco Pellegrini¹, Hidetoshi Okada¹, Masanori Naitoh¹ (1.The Institute of Applied Energy)

Keywords:SAMPSON, MELCOR, UN1, Crosswalk, Severe Accident Code

The Fukushima Daiichi nuclear power plant accident is analysed by various severe accident (SA) computer codes like SAMPSON, MELCOR and MAAP, which shows different results with different initial condition or user inputs. In this study, we performed calculations against UN1 accident progression with SAMPSON and compared the results with those of MELCOR with the same initial condition. Assessment about the difference of the two codes results and where these difference come from with consideration about numerical solving approach or model difference will be presented.