KI meaning

KI (potassium iodide) refers to stable iodine tablets used as a thyroid‑blocking measure in nuclear or radiological emergencies to reduce uptake of radioactive iodine (I‑131). In legal practice it features in emergency planning, nuclear site licensing, public health protection and procurement. In Great Britain, KI is recognised as a protective action under the Radiation (Emergency Preparedness and Public Information) Regulations 2019 (REPPIR 2019). Dutyholders (nuclear operators) and local authorities must plan for its availability and public information within off‑site emergency plans, including pre‑distribution or rapid distribution where appropriate. Comparable provisions apply in Northern Ireland under equivalent REPPIR regulations. Administration occurs only on the advice of public health authorities (e.g. UKHSA and Public Health Scotland). In Ireland, the term is used within national radiological emergency arrangements under legislation implementing the EU Basic Safety Standards, overseen by the Environmental Protection Agency and the HSE, with plans providing for stockpiling and distribution of stable iodine. Key legal points: KI protects only the thyroid from radioiodine and is not a general anti‑radiation medicine; timing and priority groups (especially children and pregnant or breast‑feeding people) are critical. Policies on procurement, storage, distribution and public information are core compliance issues for dutyholders and responders.