Moderation principle inherent safety

Inherent safety has first widely expressed in the late 1970 s by Trevor Kletz. The basic principles are common sense and include avoiding the use of hazardous materials, minimising the inventories of hazardous materials and aiming for simpler processes with more bening and moderate process alternatives (Kletz, 1984). 

Hydrogen powered cars are assessed similarly to transport units. In fact for a mobile unit, credit factors of releases caused by crash accidents can be considered at least an order of magnitude more probable than operative failures. Overall indices for a single vehicle are reported in Table 4. The analysis of both the potential index (PI) and the hazard index (HI) immediately reveals that the innovative technology of metal hydrides yields safer storages by the application of the moderation principle of inherent safety (CCPS, 1996). 

The primary philosophy is to follow the principles of inherent safety. This implies a systematic effort to apply the principles of hazard elimination, minimization/ intensification, hazard substitution, moderation/attenuation, and simplification. However, additional controls will still be required to control a hazardous situation, prevent escalation, and mitigate the risk to people, to the environment, asset, and reputation. Preferably, these safeguards will be passive- or active-engineered controls rather than administrative controls (i.e., dependent on direct human intervention). 

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