Depleted Uranium (DU) meaning

In legal practice, depleted uranium (DU) describes uranium remaining after enrichment, with a U‑235 content lower than that of natural uranium (about 0.7%), and therefore composed mainly of U‑238. It is typically produced as enrichment “tails” (by‑product residues from isotope separation) or recovered from reprocessed fuel. DU is encountered in regulatory compliance, procurement and liability matters, including its use in radiation shielding, industrial counterweights and, in some jurisdictions, armour‑piercing munitions. The expression is descriptive rather than a single statutory definition; UK and Irish legislation and guidance use it in this scientific sense. Legal treatment turns on its radiological properties and heavy‑metal toxicity, not the label. In England and Wales, activities involving DU generally require authorisation under the Environmental Permitting Regulations; in Scotland and Northern Ireland under the Radioactive Substances Act 1993; and in Ireland under radiological protection legislation. Handling DU engages nuclear safeguards and record‑keeping, transport of dangerous goods, waste and contaminated land controls, and employer duties under the Ionising Radiations Regulations (UK) and general health and safety/COSHH regimes. Export and arms controls may apply where DU is incorporated in military goods. Usage and regulatory approach are broadly consistent across England & Wales, Scotland, Northern Ireland and Ireland.