LIVE-J1 experiment on debris melting behavior toward understanding late in-vessel accident progression of the Fukushima Daiichi Nuclear Power Station

Madokoro, Hiroshi; Yamashita, Takuya; Sato, Ikken; Gaus-Liu, X.*; Cron, T.*; Fluhrer, B.*; Stngle, R.*; Wenz, T.*; Vervoortz, M.*; Mizokami, Shinya

Proceedings of 19th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-19) (Internet), 16 Pages, 2022/03

Particle-based simulation of heat transfer behavior from molten mixture pool to structural wall in EAGLE ID1 test

Tokioka, Hiromi*; Morita, Akihiro*; Nakamura, Riichiro*; Morita, Koji*; Kamiyama, Kenji; Suzuki, Toru

no journal, , 

A numerical simulation on a series of molten fuel behaviors from pin disruption to pool formation was conducted using a particle method. Through the simulation, heat transfer behavior accompanied by a high heat-flux from molten mixture pool to structural wall was clarified.

Validation of three-dimensional finite volume particle method for simulation of two-liquid mixture flow behavior

Kato, Masatsugu*; Ogawa, Ryusei*; Funakoshi, Kanji*; Liu, X.*; Matsumoto, Tatsuya*; Liu, W.*; Morita, Koji*; Kamiyama, Kenji

no journal, , 

no abstracts in English

LIVE experiment on thermal behavior of solid-liquid mixture pool in RPV lower head

Madokoro, Hiroshi; Gaus-Liu, X.*; Cron, T.*; Fluhrer, B.*; Stngle, R.*; Wenz, T.*; Vervoortz, M.*; Yamashita, Takuya; Sato, Ikken; Mizokami, Shinya

no journal, , 

Since the structures inside the pedestal of Fukushima Daiichi Nuclear Power Station Unit 2 are relatively intact, the temperature of fuel debris relocated from the reactor pressure vessel (RPV) to the pedestal region is estimated to be rather low; oxide components remained solid and metallic components are molten. In order to predict the RPV failure, the molten pool behavior in the lower head is a key factor. Only a few experiments, however, addresses the transient heat transfer of solid-liquid molten pool. To enrich experimental database, melting and heat transfer behavior are investigated using the LIVE facility at Karlsruhe Institute of Technology. The results showed that convective heat transfer could take place in a solid-liquid mixture pool and the thermal loads on the vessel wall shifted from bottom upwards.