How to understand the units within major hazard sources?
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In the specifications, a unit refers to one set of production equipment, facilities, or premises, or several sets of such equipment, facilities, or premises that belong to the same production and operation entity and are within a distance of less than 500 meters of each other. By this calculation, a factory can basically be considered as a single unit; in that case, the critical amount is definitely exceeded. Should such a factory be classified as a major hazard source?
It refers to a situation where the storage volume of hazardous chemicals exceeds a critical amount – the quantity specified for a particular hazardous chemical or category of such chemicals; if the amount of hazardous chemicals in a unit is equal to or exceeds this quantity, then that unit is considered a major hazard source. In my opinion, your understanding is correct.
For example, if the critical amount for a certain substance is 2 tons, and there are two tanks 500 meters apart, each holding 1 ton, then when classifying them as major hazard sources, should these two tanks be considered as one unit? It feels weird...
When evaluating, it depends on how many major hazard sources a unit has
Refining and chemical enterprises have multiple units, and the inventory of hazardous materials in each of these units exceeds the critical threshold. When classified according to major hazard sources, should each of these units be considered a separate major hazard source, or should the entire plant area be regarded as one such major hazard source?
I know there are several key hazard sources. I want to understand how to approach this: if two furnaces are 200 meters apart, and the storage volume for each individual furnace is below the critical level, but together they reach the critical level, do they then count as key hazard sources? If the individual storage amounts each reach the critical level, then how many major hazard sources do they constitute?
There is indeed some ambiguity. My understanding is as follows: if the amount within a set of installations (sites, etc.) exceeds a critical value, it is considered one unit; if it does not exceed that critical value, then the amounts of the installations (sites, etc.) that are within 500 meters of each other are taken into account.
According to what the guy upstairs said, basically every enterprise has potential hazards... There’s nothing we can do about it...