2023 Fiscal Year Final Research Report
Verification of the feasibility of damage reduction method for hydrogen gas explosion accidents in highly airtight spaces using porous structural members
| Project/Area Number |
19K04929
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 25020:Safety engineering-related
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| Research Institution | Shibaura Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Keywords | 水素ガス爆発 / 減災システム / 爆発圧力緩和 / ポーラス体 / 消炎 |
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| Outline of Final Research Achievements |
Aiming to establish a disaster mitigation method to reduce the pressure rise during a hydrogen gas explosions in an airtight space such as a nuclear reactor building and prevent catastrophic damage to the structure, we proposed a method of installing a space filled with porous structures (in this study, spherical particles such as glass beads were used) on part of the wall of the explosion space and verified it using a model experimental device. As a result, it was shown that the method proposed in this study can effectively reduce the pressure rise in the explosion space, and knowledge was obtained such as the effective spherical particle size and the ratio of the volume of the porous structure filled space effective for pressure reduction to the volume of the explosion space. Furthermore, it was shown that the disaster mitigation effect can be improved more by adding functionality such as high porosity to the filled particles.
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| Free Research Field |
燃焼工学，熱工学
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| Academic Significance and Societal Importance of the Research Achievements |
福島第一原子力発電所原子炉建屋における一連の水素ガス爆発の発生は，回復が極めて困難かつ甚大な被害をもたらした．近年では，水素を代替エネルギー源として普及させ，利用する試みも活発化しており，水素ガス爆発安全への対策が増々重要になっている．本研究で実証したポーラス構造部材を充填した空間を爆発が発生する可能性のある空間に隣接して設置する爆発圧力緩和法は，スケール効果等，さらに検討すべき事項も多いが，効果的な水素ガス爆発減災法の実現に資するものとなることを期待している．
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