The DOW FEI, Vade Mecum and ICI Mond methods are important methodologies used to assess the safety of hazardous chemical processes. Each offers unique approaches to assessing and managing risks in industrial facilities:

 

• DOW Fire and Explosion Index (DOW FEI): This method is used to quantitatively assess the fire and explosion potential of a facility. It analyzes how much damage and injury certain equipment and processes can cause. It is used to determine the worst-case scenario under the BEKRA regulation.

  • DOW F&EI quantitatively calculates the fire and explosion potential in a plant, taking into account the general and specific hazards of the process.

  • The DOW F&EI index is used to identify the greatest hazard scenarios under the BEKRA (SEVESO) regulation. This is critical for the identification and containment of risky equipment.

  • It guides process safety experts and process engineers in hazard analysis and helps them develop strategies to prevent potential fire or explosion incidents.

 

• Vade Mecum: The Vade Mecum method was developed by the European Union's "Major Accident Hazards Bureau" (MAHB) within the framework of Seveso III regulations. This method is used to group hazardous equipment. It assesses the hazard potential of an equipment based on the hazard characteristics of the chemicals it contains. Vade Mecum is a method used to assess accident hazards in large industrial plants containing hazardous chemicals. This method classifies the potential for major accidents in facilities and helps to identify the risks that need to be managed.

  • Vade Mecum is a method for hazard rating of equipment containing hazardous chemicals based on the SEA regulation and classification according to a tonnage range based on the BEKRA regulation. This method classifies the potential for major accidents in facilities and helps to identify the risks that need to be managed.

  • The advantage of using the Vade Mecum method is to identify hazards that may cause major accidents due to tonnage.

 

• ICI MOND Index: This method is used for risk analysis, especially in chemical industry facilities. Like the Dow FEI, it assesses fire and explosion risks but develops more specific scenarios using different parameters. ICI MOND Analysis is a method used to assess the environmental hazards and toxicity of hazardous chemicals. It was developed specifically to analyze environmental and health hazards in more detail than existing risk assessment methods such as the DOW Fire and Explosion Index (DOW FEI).

  • This method is critical in various industries and especially in chemical processing plants because it centers on the management of substances with potential environmental and health impacts.

  • ICI MOND is used to analyze chemicals that can cause harm to the environment. This aims to identify the environmental impacts and potential hazards of chemicals.

  • Analysis of Toxic Chemicals: The method aims to analyze the effects of toxic chemicals on human health in depth. This can lead to safer working environments and environmental protection.

  • ICI MOND can be used as an effective tool in risk management processes, minimizing the harm that chemicals can cause and improving safety standards.

 

​Major accident scenario document

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​ARTICLE 8 –  (1) Major accident scenario document is prepared or has it prepared by the operator of the lower and higher level establishments within the scope of this Regulation in order to determine the dangers of major industrial accidents and to evaluate the risks that may arise from these hazards.

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(2) Major accident scenario document, after the identification and classification of dangerous goods in accordance with the definition of dangerous goods in Article 5 of this Regulation, by using one or more of the methods in the national or international standards and generally accepted scientific literature, The major accident scenario document to be issued within the scope of the project is prepared in accordance with the criteria specified in the communiqué and by following the steps below:

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a) Identification of hazardous equipment.

b) Identification of internal hazards through identified hazardous equipment.

c) Identification of external hazards that may originate from outside the organization that may affect hazardous equipment.

ç) Establishing major accident scenarios on dangerous equipment with methods that can produce results suitable for comparison with the major industrial accident frequency value in Article 9 of this Regulation.

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(3) During the determination of internal and external hazards, past accidents, near misses and accessible records in accident data banks are also taken into account.

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(4) Major accident scenario is formed in a way to include all possible spread, fire or explosion events, starting from the root causes determined according to the hazards determined according to the second paragraph. However, in scenarios to be created using a single root cause and effect pair, each of the possible spread, fire and explosion events is taken into account.

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(5) The operator shall provide detailed information about the reliability data and probability data used in the major accident scenario document from which data banks or sources.

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(6) In case the operator becomes a lower or higher level organization due to the change in the type and/or amount of dangerous goods, this document shall be prepared within one year following the date it is included in the scope.

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(7) The operator keeps the prepared major accident scenario document in the establishment.

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(8) The Ministry of Family, Labor and Social Services publishes a communiqué containing the procedures and principles regarding the major accident scenario document.

 

ALARP value of major industrial accident frequency

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ARTICLE 9 –  (1) The operator reduces the frequency of occurrence of each major industrial accident scenario to 1x10-4/year or less, for dangerous equipment that may cause major accidents.

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Major accident scenario document, “ Regulation on Preventing Major Industrial Accidents and Reducing Their Effects ”  After the identification and classification of dangerous goods in accordance with the definition of dangerous goods in Article 5, one or more of the methods in the national or international standards and generally accepted scientific literature are used, and the major accident scenario document to be issued within the scope of the relevant regulation is specified in the communiqué. It is prepared in accordance with the criteria and following the steps below:

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a) Identification of hazardous equipment.
b) Identification of internal hazards through identified hazardous equipment.
c) Identification of external hazards that may originate from outside the organization that may affect hazardous equipment.
ç) Establishing major accident scenarios on dangerous equipment with methods that can produce results suitable for comparison with the major industrial accident frequency value in Article 9 of the Regulation.

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In order to have a detailed idea about Quantitative Risk Assessment and GYS, please review the Article and Blog section.

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