11:35 〜 11:50
[2B09] Assessment of Core Status of TEPCO's Fukushima Daiichi Nuclear Power Plants
(106)Improvements of SAMPSON debris to lower head wall heat transfer models
キーワード：Fukushima, Severe Accident, In-Vessel Cooling, Lower Head Failure, SAMPSON
Analyses of Fukushima severe accident by SAMPSON code have shown nearly no
temperature increase of lower head wall after relocation of molten core
materials into lower head. Therefore, the heat transfer models between
debris and lower head wall have been verified through simulation of SONATA
experiment resulting in notable improvement of these models under
conditions without the effect of gap cooling phenomenon. The present study
is performed to take into account the gap cooling effect observed in
SONATA experiment to improve SAMPSON debris to lower head wall heat
transfer models under in-vessel cooling conditions.
temperature increase of lower head wall after relocation of molten core
materials into lower head. Therefore, the heat transfer models between
debris and lower head wall have been verified through simulation of SONATA
experiment resulting in notable improvement of these models under
conditions without the effect of gap cooling phenomenon. The present study
is performed to take into account the gap cooling effect observed in
SONATA experiment to improve SAMPSON debris to lower head wall heat
transfer models under in-vessel cooling conditions.