JOPSS - Search Results

Search Results: Records 1-6 displayed on this page of 6

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Oral presentation

Studies on relocation behavior of molten core materials in the core disruptive accident of sodium-cooled fast reactors, 3; A Simulation of a Heavy Metal Jet with MPS Method

Konomura, Mamoru*; Kamiyama, Kenji

no journal, ,

A behavior of a heavy metal jet which ran into a water pool was analyzed with the Moving Particle Semi-implic Method. A little pressurization proved useful to suppress unrealistic cavity which appeared in the pool.

Oral presentation

Studies on relocation behavior of molten core materials in the core disruptive accident of sodium-cooled fast reactors, 5; A Behavior of a heavy metal jet with free surface condition of MPS method

Konomura, Mamoru*; Kamiyama, Kenji

no journal, ,

A behavior of a heavy metal jet which ran into a water pool was analyzed with the Moving Particle Semi-implict Method. A pressure calculation without a free surface condition proved useful to suppress unrealistic cavity.

Oral presentation

Studies on relocation behavior of molten core materials in the core disruptive accident of sodium-cooled fast reactors, 6; A Modelling of the tip of a heavy metal jet with MPS method

Konomura, Mamoru*; Kamiyama, Kenji

no journal, ,

A behavior of a heavy metal jet which ran into a water pool was analyzed with the Moving Particle Semi-implicit Method. A figure of the tip of jet was different from that of the experiment. We propose a modified calculating model with the MPS method.

Oral presentation

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

Oral presentation

Analysis of fuel debris discharge behavior from the 1F Unit-2 RPV lower head region with MPS method

Bando, Yamato*; Yamaji, Akifumi*; Yamashita, Takuya

no journal, ,

no abstracts in English

Oral presentation

Estimation of RPV damage and fuel debris relocation behavior in the PCV at Fukushima Daiichi Nuclear Power Station, 8; Numerical simulation of core material relocation behavior in the RPV lower head region

Li, X.; Yamaji, Akifumi*; Sato, Ikken*; Yamashita, Takuya

no journal, ,

This study presents a numerical evaluation of possible core material discharge behavior from the RPV lower head region including the penetrations (Control Rod Drive (CRD) Housing) in 1F Unit-2 with Lagrangian-based MPS method. Two-dimensional geometry is established to model CRD housing with simplified inner structures inthe center of RPV, with surrounding RPV walls and RPV insulation below. The initial temperature distribution/boundary conditions referenced the results from accident progression and global RPV CFD analysis (Series presentations (2), (5), and (7)). The results show that local CRD housing melting assumed at 15%Zr-85%Fe eutectic temperature (1523 K) before global RPV failure could result in melt discharge into the pedestal, which is consistent with the accident progression analysis and plant internal investigation results.