The Experimental and simulation results of LIVE-J2 test; Investigation on heat transfer in a solid-liquid mixture pool

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

Nuclear Technology, 209(2), p.144 - 168, 2023/02

https://doi.org/10.1080/00295450.2022.2121545

Post-test analyses of the CMMR-4 test

Yamashita, Takuya; Madokoro, Hiroshi; Sato, Ikken

Journal of Nuclear Engineering and Radiation Science, 8(2), p.021701_1 - 021701_13, 2022/04

https://doi.org/10.1115/1.4051443

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

Analysis of samples collected in PCV interior of Fukushima Daiichi NPP, 6; Use of analysis results of collected samples toward fuel debris retrieval

Kurata, Masaki; Madokoro, Hiroshi; Okumura, Keisuke; Sato, Ikken; Mizokami, Masato*; Ito, Kenichi*; Mizokami, Shinya*

no journal, , 

Based on the analysis of the samples collected in the PCV interior of Fukushima Daiichi NPP, potential issues regarding the fuel debris retrieval are summarized. The analytical targets, analytical method and obtainable knowledge that are necessary to evaluate each issue are discussed. Valuable information can be obtained even from small samples to understand the current situation of the plant and the accident progression. Although the amount of collectable samples is limited, we considered how to evaluate the whole fuel debris and how to utilize the analytical results for recriticality, burnup and safety issues.

Estimation of the in-depth debris status of Fukushima Unit-2 and Unit-3 with Multi-Physics modeling, 2; Points of discussion on debris conditions in Units 2 and 3

Sato, Ikken; Yamaji, Akifumi*; Furuya, Masahiro*; Oishi, Yuji*; Li, X.; Madokoro, Hiroshi; Fukai, Hirofumi*

no journal, , 

no abstracts in English

Estimation of the in-depth debris status of Fukushima Unit-2 and Unit-3 with multi-physics modeling, 3; Overview of the project and progress of the first year

Yamaji, Akifumi*; Furuya, Masahiro*; Oishi, Yuji*; Sato, Ikken; Li, X.*; Fukai, Hirofumi*; Madokoro, Hiroshi

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.

Estimation of the in-depth debris status of Fukushima Unit-2 and Unit-3 with multi-physics modeling, 10; Evaluation of debris relocation and interaction with pedestal structures in Fukushima Daiichi Unit-3 with MPS method

Li, X.*; Yamaji, Akifumi*; Sato, Ikken; Furuya, Masahiro*; Madokoro, Hiroshi; Oishi, Yuji*

no journal, , 

Estimation of the in-depth debris status of Fukushima Unit-2 and Unit-3 with multi-physics modeling, 12; Evaluation of debris-relocation history to the pedestal in Fukushima-Daiichi Units 2 and 3

Sato, Ikken; Yamaji, Akifumi*; Furuya, Masahiro*; Oishi, Yuji*; Li, X.*; Madokoro, Hiroshi

no journal, , 

no abstracts in English