Depleted Uranium: Military Uses, Health Hazards & Environmental Concerns

Depleted uranium (DU) is a byproduct of uranium enrichment (U-235 removed); ~99.8% U-238. Dense (19.1 g/cm³), pyrophoric, weakly radioactive (alpha/beta).

Military Applications

• Kinetic energy penetrators: Tank rounds (120mm, 105mm) – self-sharpening, defeats heavy armor.
• Armor plating: Abrams tanks, Bradley vehicles – high density stops incoming rounds.
• Counterweights/ballast: Aircraft (747, C-130), missiles, gyroscopes.

Exposure Pathways

• Inhalation: Aerosolized DU oxide dust on impact (penetrators) or fire (armor).
• Ingestion: Contaminated food/water, hand-to-mouth.
• Embedded fragments: Shrapnel retained in body.
• External radiation: Minimal (alpha blocked by skin/clothing).

Health Effects

• Chemical toxicity (primary concern): Kidney (proximal tubule damage), liver, bone.
• Radiological: Theoretical cancer risk from alpha emission; no excess cancers confirmed in Gulf War veterans with embedded fragments (VA surveillance).
• Gulf War Illness overlap: DU studied as contributor; not sole cause.

Environmental Impact

• DU dust contaminates soil, water, vegetation at firing ranges, battlefields.
• Long half-life (4.5 billion years) – persistent.
• Cleanup costly and incomplete (Iraq, Balkans, Kuwait, US ranges).

Monitoring & Policy

• VA DU Follow-Up Program: Baltimore cohort with embedded fragments – 25+ years monitoring.
• DoD: Exposure assessment, training, PPE for handlers.
• UN/IAEA: Guidelines for post-conflict DU assessment/remediation.

DU's military utility is clear; its long-term health and environmental legacy requires ongoing vigilance and transparency.