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Plant disaster
simulation

Using our proprietary plant disaster simulation program,Evaluate the impact of the disaster.

Plant disasters don't end with a single explosion. They follow a step-by-step scenario in which a liquid "leaks," then vaporizes and "spreads," leading to a "fire" and finally an "explosion."

Using our proprietary simulation programs, we conduct consistent disaster simulations covering the entire process from initial events such as leaks and evaporation to gas diffusion, fire, and explosion, and evaluate the overall impact.

Solutions Offered

Problems that can be solved

We can solve these problems!

  • I want to know how widespread the damage would be if a fire broke out.

  • I want to know if the equipment and tactics we possess are sufficient to deal with a large-scale fire.

  • I would like you to identify the potential disaster risks lurking within the factory from an objective perspective.

Cases

Solutions Offered

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Solution 01

Leakage, evaporation, and diffusion

Our proprietary program simulates the phenomena of hazardous material leakage, evaporation, and gas diffusion over time, taking into account meteorological conditions and thermal balance.
Gas diffusion is simulated using a highly accurate puff model. This is displayed on a map using 3D/2D maps, supporting accurate assessment of concentration distribution and explosion risk.

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Solution 02

Explosions (BLEVE, Fireball, VCE, Flash Fire)

Based on disaster prevention assessment guidelines for petrochemical complexes, this system supports simulations of VCE (Volatile Condensed Emissions), BLEVE (Boiling Liquid Expansion Emissions), fireballs, and flash fires.
The system overlays the areas affected by pressure waves, radiant heat, and flashfires onto a map, supporting accurate assessment of the risks posed by explosions.

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Solution 03

Radiant heat (tank fires, leak fires)

This software calculates the radiation intensity emitted by fires involving hazardous materials or liquefied gases and displays it on two-dimensional and three-dimensional maps.

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Solution 04

Boilover

Based on the unique distillation curve for each type of crude oil, we predict the time until boilover occurs and the cooling time for residual oil after fire extinguishing.
The extent of damage resulting from boilovers will be presented based on various insights from overseas.

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Solution 05

Numerical analysis

In collaboration with specialized numerical analysis companies, we also offer simulations of explosions, fire spread, smoke generation and diffusion, and leaked gas diffusion using FDS and CFD solvers developed by NIST in the United States.

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In-house developed software

Leakage, liquid spread, evaporation
simulation

A program that calculates leakage rate, flash rate, spread rate of the leaked liquid, liquid pool depth, and evaporation rate from the surface of the leaked liquid, based on the time elapsed since the hazardous material spill.

Gas diffusion
simulation

This program shows the change in the diffusion range of a gas over time. It employs a puff model with closely spaced puffs to improve calculation accuracy. It can display values in terms of explosive limit concentration, ppm, odor intensity, etc.

Crude oil evaporation and diffusion
simulation

A program that calculates the time-dependent changes in evaporation rate and evaporation residual based on the crude oil distillation curve and displays an explosion limit concentration map.

explosion
simulation

A program that calculates the affected area from pressure waves caused by explosions such as BLEVE and VCE, fireballs that follow BLEVE, and flash fires, based on the Combo Guidelines.

Radiant heat calculation
simulation

A program to calculate the radiation intensity emitted by tank fires, oil containment dike fires, and other oil spill fires (pool fires) occurring at any location.

Boilover
simulation

A program that calculates the temperature and growth rate of the hot zone, the time to occurrence, and the change in oil temperature inside the tank after the fire is extinguished, based on the crude oil distillation curve, in the event of a boilover caused by a full-scale tank fire.

Case Studies

Here are some examples of how disaster simulations have been used to improve disaster management systems.

01

For the purpose of informing local residents and related organizations about evacuation plans and explaining safety measures.

As outlined in the Fire and Disaster Management Agency's disaster assessment guidelines for petrochemical complexes, we confirm the damage estimates in the event of a disaster and utilize this information as appropriate informational material for nearby residents and relevant parties.

02

Advanced disaster impact assessment andUse in third-party evaluations

Our simulation technology quantitatively calculates the impact of disasters. This method is recommended by third-party organizations for safety level assessments, and the assessment results can be used directly as highly persuasive explanatory materials.

03

By combining it with disaster prevention simulations, it can serve as supporting documentation for explaining legal requirements.

By combining it with disaster simulations, it can be used as supporting documentation when applying to the relevant administrative authorities regarding various matters required by law.

04

Certified by the Minister of Economy, Trade and Industry
"Super Certified Businesses"
To obtain certification

スーパー認定事業所の認定要件である「高度な緊急時対応訓練」の対策として、当社の災害・防災シミュレーションをご活用いただけます。スーパー認定により、連続運転期間を最大8年まで設定できるなどの利点が得られます。

05

As supporting documentation for insurance coverage conditions

当社のシミュレーション技術により、財物保険の付保条件の根拠としてや、賠償責任保険の付保条件の根拠としても活用いただいております。

Disaster Scenario Examples

当社では下記例のように漏洩・蒸発などの初期事象から、ガス拡散・火災・爆発までの一連の流れについて一貫した災害シミュレーションを実施し、全体としての影響度評価を行っています。東南海地震などの大規模地震対策の流れの中で、このような一連の災害シナリオに基づく影響度評価は、今後重要になってきます。

Disaster simulation following a series of steps

Spherical tankLeak from
1.

Leakage and evaporation from a spherical tank.
(Calculate leakage/evaporation rate)

2.

Gas diffusion
(Illustration showing the change over time in the 50% range of LEL)

3.

It ignited and a flash fire occurred.
(Illustrate the scope of the impact)

4.

Backfire caused a fire at the oil containment dike.
(Illustrate the radiant heat range)

5.

BLEVE occurred
(Illustration showing the range of pressure waves and debris dispersion)

6.

Fireball occurs
(Illustration showing the area affected by radiant heat)

Example results (PDF)
Crude oil tanksLeak from
1.

Crude oil tanks caught fire
(Illustration showing the area affected by radiant heat)

2.

The fire could not be extinguished and a boil-over occurred.
(Calculate the time until occurrence and the amount of remaining oil)

3.

The diagram illustrates the area affected by radiant heat and the extent of oil splatter during a boilover.

Example results (PDF)
Horizontal tank containing toxic gasLeak from
1.

Leakage from a tank containing toxic gas (liquid) (calculation of leakage/evaporation rate)

2.

Gas diffusion (illustrated the change in the affected area over time, using either ppm, 50% of LEL, or odor intensity).

Example results (PDF)

Business

Other business activities

Plant disaster preventionsimulation

Water discharge trajectory simulation

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045-222-8870

9:00 AM to 5:00 PM(Closed on Saturdays, Sundays, and public holidays)

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Plant and factory safety
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