Refrigerated storage mitigation

Refrigerated storage of hazardous materials that are stored at or below their atmospheric boiling points mitigates the consequences of containment loss in three ways ... 

Refrigerated storage is most effective in mitigating storage facility risk if the material is refrigerated when received. 

The results for the warm and pressurized ammonia storage (unmitigated) and the refrigerated ammonia storage (mitigated) are summarized in Table 7.4. 

A comparison of the hazard zone areas in Table 7.5 shows that the combination of refrigerated storage with a dike results in significant reductions in the range of 50 to 85%. This example illustrates the point made in Section 3.1.2.3 that the most effective postrelease mitigation results will be obtained through the combination of the separate methods discussed in this guideline. 

The NFPA 43B classification system is used to specify or determine the need for certain requirements that can prevent or mitigate the effects of fire and explosion. These requirements include allowable quantities, automatic sprinkler protection, the need to store certain organic peroxide formulations in a refrigerator or freezer, storage arrangement, and building construction features. 

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