[1E13-17] Severe Accident of Fukushima Daiichi 2

[1E15] Assessment of Core Status of TEPCO's Fukushima Daiichi Nuclear Power Plants

(97)Assessment of "SAMPSON/DCA" Heat Transfer Models between relocated molten core and RPV lower head wall

*Alexandre Ezzidi¹, Masanori Naitoh¹, Hide Okada¹, Chiaki Kino¹ (1. IAE)

Keywords:SAMPSON code, severe accident, in-vessel retention, molten pool in lower head, gap cooling

In the frame of SAMPSON code model assessment and validation work for PWR applications, stand-alone analysis is performed with debris cooling analysis module (DCA) in order to verify and evaluate corium to lower head heat transfer models. In this analysis, an in-vessel cooling experiment is simulated in DCA module and the calculation results are compared with the experimental data. According to this comparison result, model improvements could be performed in future work.