What is the order of hazards for DU from most hazardous to least hazardous?

The correct order of hazards for Depleted Uranium (DU) from most hazardous to least hazardous is radiological, chemical, then explosive.

Depleted Uranium is primarily a radiological hazard due to its radioactive properties. This radiation exposure poses significant health risks, including long-term health effects such as cancer. The radiological risk associated with DU is considered the most serious concern, particularly in contexts where it can lead to internal exposure through inhalation or ingestion.

The next concern is its chemical toxicity. While DU is not highly explosive, it can have toxic effects similar to heavy metals, particularly when ingested or inhaled. The chemical hazards involve the potential for harmful interactions with biological systems, although these effects are often secondary to the immediate risks posed by the radiological hazard.

The least concerning hazard is the explosive potential. DU does not have explosive properties under normal conditions and is categorized primarily as a heavy metal. While it can ignite under certain conditions, such as when it is fine particulate, this is a less significant risk compared to the radiological and chemical hazards.

Thus, understanding the nature of DU reveals that its primary threat comes from its radiological aspect, followed by chemical toxicity, and finally its explosive potential, which is relatively minimal in comparison.