Explosion Safety Research Group

6 Researchers:
Tomoharu Matsumura,Miyako Akiyoshi,Ken Okada, Yuta Sugiyama, Takahiro Tamba

7 Contract Employees

Outline

We are conducting a wide variety of studies concerning explosion safety - ranging from basic to applied - by advancing the understanding of ignition and explosion phenomena of high energy substances that are representative of explosives. These studies include safety assessment methods and safety technologies, techniques for reducing explosion effects, and technologies for effective utilization of energetic materials.
In addition, we are actively responding to government needs for explosives by executing large-scale explosion tests in the field. The results obtained are reflected in both creating standards for safe handling techniques of explosives and establishing the formulation of standards for handling internationally hazardous substances through improvement of UN Manual of Tests and Criteria, thereby contributing to the realization of a safe and secure society.

Research Highlights

Development of Methods and Techniques for Evaluating and Mitigating Explosion Effects

Explosion Tests in the Field

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
- Reduction of 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

Ref: Report on technical standard for explosion mitigation of explosives (2016)

Numerical Calculation Techniques

Developing techniques for predicting effects of explosions based on numerical calculations that are highly precise and computationally fast

Modeling of magazines
for explosives

Simulation results of gases produced by explosion

International contributions for explosion safety

Classification of Explosives and Energetic Materials for Safety

Contributing to formulation of handling standards for internationally designated hazardous substances through activities such as improving the UN Manual of Tests and Criteria for regulation of chemical substances

Evaluation Techniques for Explosion Safety for Energetic Materials

Explosibility Evaluation Based on Exothermic Decomposition Energy

Development of method to measure exothermic decomposition energy for evaluation of explosibility of chemical substances (JIS K4834)

For over 50 samples of explosives (energy substances), we conducted consistent measurements of the exothermic decomposition energy based on JIS K4834.

→ We clarified the relationship between exothermic onset temperature and exothermic decomposition energy.

Development of Standard Technique for Stability Test of Explosives

We have determined that NO gas is emitted by explosives. We are developing a method for performance trials of iodide potassium starch paper for stability test of explosives using NO as a calibration gas.

→ Contribution to revision of JIS K 4822(2017), and revision of notice of MITI 1995

Stability test of explosives

Development of technologies for more effective use of explosives

High-Efficiency Production Technique for Detonation Nanodiamond

Development of original explosion device

→ Patent of production method at a low-cost and high-efficiency

Development of Functional Materials by Shock Compression

Light-emitting materials, carbon based materials, etc.

Synthesis of energetic materials having nanostructures

Synthesis of nano-nitrocellulose

→ Improvement of combustibility and application to new devices