Evaluation results and hazardous area map

The "Voluntary Action Plan," which is required as an attachment to the fire prevention regulations when applying for fire safety permits, will include the risk assessment method, assessment results, and compliance requirements based on the assessment.

1. the purpose
2. Scope and Applicable Standards
3. Definition of Terms
4. Basic principles of ensuring safety
5. Risk assessment methods
   1. 5.1 Substances to be evaluated
   2. 5.2 Extraction of emission sources to be evaluated
   3. 5.3 Precise Risk Assessment
6. Risk assessment results
7. Measures to secure non-hazardous areas
   1. 7.1 Control measures for release sources
   2. 7.2 Ensuring a "Good" level of ventilation effectiveness
8. Compliance requirements based on risk assessment results
9. Installation and management of non-explosion-proof equipment
   1. 9.1 Safety assessment of non-explosion-proof equipment
   2. 9.2 Control of non-explosion-proof equipment
   3. 9.3 Precautions when using stationary and mobile non-explosion-proof equipment
   4. 9.4 Precautions when using portable non-explosion-proof equipment
10. Maintenance and management of ventilation systems
11. Change Management
12. Implementation and recording of regular training

The individual risk assessment results represent the risk assessment results for a single emission source. Within this, the assessment conditions (target substance, operating conditions, emission source, assessment location, ventilation characteristics, etc.) and the assessment results are summarized. A table listing the physical properties of the evaluated substance is also attached.
Typically, several hundred emission sources are identified throughout the entire facility, so we will provide results for that number of sources.

Example of individual risk assessment results

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Examples of individual risk assessment results and physical property data

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The plot plan can display the hazard zone in the following two ways:

3D shape overlay display

If you can provide us with CAD data of documents (such as piping diagrams) that clearly show the location of flanges, valves, and other leak sources, we can indicate the hazardous area as a specific location, as shown in the following diagram.
Even in areas with multiple leak sources that constitute a hazardous zone, the hazardous areas of the entire facility can be determined by overlaying the hazardous areas of individual release sources. This can then be used to clearly define zones where non-explosion-proof equipment can and cannot be used, tailored to the actual operational conditions at the facility.
Furthermore, it is expected to be used in areas requiring spatial positioning information, such as for safe drone flight planning and future applications in autonomous flight functions.

Represented in three dimensions on a three-dimensional diagram

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Represented in three dimensions on a two-dimensional plot diagram.

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Represented in two dimensions on a two-dimensional plot diagram.

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Conventional representation using floor plans and elevations

As before, it is also possible to indicate hazardous areas on floor plans and elevation drawings.
If there are multiple leak sources, displaying all of them would be cumbersome. Therefore, representative diagrams are used to show each type of leak source, such as flanges and valves.

Example of a hazardous area map

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Left: Floor plan Right: Elevation view

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