Explosion Safety Research Group
Explosion Safety Research Group
７Researchers:
Shiro Kubota, Yuta Sugiyama, Takahiro Tamba, Kazuya Nomura, Tomoharu Matsumura, Miyako Akiyoshi
５Contract Employees
Outline
To advance the understanding of ignition and explosion phenomena of high-energy materials, such as explosives, we are conducting a wide variety of research, from basic to applied. Specific topics include explosion safety, such as safety evaluation methods and visualization techniques, technologies to reduce the effects of explosions, and safety evaluation of batteries.
Also, in response to governmental requirements regarding explosives, we conduct large-scale field experiments. The results obtained are reflected in the creation of standards for technologies to safely handle explosives. We also use these results to help formulate international standards for the handling of hazardous materials, e.g., by making proposals for UN testing. Through these activities, we contribute to the realization of a safe and secure society.
Research Highlights
Development of Methods and Techniques for Evaluating and Mitigating Explosion Effects
Field Explosion Test
- Assessing the effects occurring at the time of explosion (blast wave, fragment characteristics, ground vibration, radiant heat, explosion sound)
- Developing technologies to reduce the explosion effects
- Reducing required safety distance for more effective space utilization, etc.
- Obtaining scientific evidence and basic data for amendment of Explosives Control Act
→Contributing to the formulation of standards for techniques for handling explosives
Detonation of ANFO explosive |
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Glass scattering behavior
Small-scale Indoor Experiments
- Complementing field experiments with multi-point measurements and optical visualization.
- Development of technology to reduce blast effects by buffer materials.(vegetation, etc.)
Explosion gas interacting with miniature trees |
Validation of blast mitigation effect |
Numerical Simulation Techniques
- Developing techniques for predicting explosion effects based on numerical calculations
Modeling of magazines for explosives |
Multiple blast waves released from the magazine |
 Repeated reflection of the blast wave and its propagation toward the exit |
→Understanding of the propagation behavior and mitigation mechanism of the blast wave from the magazine |
Techniques for Evaluating Explosion Safety for Energetic Materials
Basic Research on Detonation
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- Advancement of Measurement Techniques for High-Speed Phenomena (Application of Magnetic Sensing)
- Development of new energetic materials by co-crystallization
- Investigation of the effects of blasting in the moon’s surface
- Performance evaluation of bulk emulsion explosives
High-speed photography of sympathetic detonation phenomena |
Combustion and Explosion Evaluation Study
- Safety evaluation for identifying the cause of explosion accidents
- Evaluation of transportation safety of new propellants
Standardization of Explosives
- Addition of a method for highly accurate evaluation of the stability of explosives using BJS test tubes to JIS K 4810:2023
- Creation of a new JIS K 4834:2013, “Method for measuring exothermic decomposition energy as a method for evaluating the explosion hazard of chemical substances,” which takes container material into account
BJS test tube |
Safety Evaluation of Batteries
- Gas analysis of Lithium-Ion Battery fires
- Investigation of fire suppression strategies
Lithium-Ion Battery fire |
Pyrotechnics Research
- Development of low-environmental-impact pyrotechnics
- Pyrotechnics safety research
Acceleration of a small pyrotechnic device in a tube |
Combustion of colored firework stars with different compositions |
International Contributions for Explosion Safety
Classification of Explosives and Energetic Materials for Safety
- Participated in TDG* and GHS** meetings organized by the United Nations and contributed to international coordination of chemical substance regulations
- Contributed to the formulation of international standards for the handling of hazardous substances by proposing MTC***
*TDG (Transportation of Dangerous Goods), **GHS （Globally Harmonized System of Classification and Labelling of Chemicals）, ***MTC (Manual of Tests and Criteria)
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