Radiation Safety Practice Exam

Which hazard is of greatest concern with depleted uranium munitions?

1. Chemical toxicity

2. Radioactive decay

3. Internal exposure

4. Conventional explosives

The correct answer is: Internal exposure

The greatest concern with depleted uranium munitions is internal exposure. Depleted uranium (DU) is a byproduct of uranium enrichment and is used in munitions due to its density and ability to penetrate armor. When DU munitions are fired, they can fragment and create fine particles that may be inhaled or ingested. This internal exposure is particularly concerning because it allows for the radioactive material to enter the body directly, where it can then expose internal organs to both chemical and radiological toxicity. When DU particles are embedded in the body's tissues, they can emit radiation over time, leading to a potential increase in cancer risk. Additionally, the heavy metal properties of uranium introduce chemical toxicity, but the radioactivity poses a more significant long-term risk due to the potential for cumulative radiation exposure within the body. Thus, while there are multiple hazards associated with depleted uranium, the risk of internal exposure stands out as the most significant concern due to both the act of inhalation or ingestion and the resulting health implications from ongoing exposure to radioactive material.