OL3 meaning

In legal practice, OL3 refers to Olkiluoto 3, the third reactor unit at Finland’s Olkiluoto nuclear power plant (an EPR – European Pressurised Reactor). UK and Irish energy, construction and project finance practitioners use OL3 as a shorthand case study for large nuclear EPC/turnkey projects, notable for significant delay and cost overrun disputes and long‑running ICC arbitration between the owner, Teollisuuden Voima Oyj (TVO), and the Areva–Siemens consortium, later settled, with commercial operation achieved in 2023. The expression is not defined by legislation or case law; it is a widely used descriptive term. References to OL3 typically arise when drafting or negotiating: EPC risk allocation; liquidated damages and caps; change in law and force majeure; interface and design liability; performance guarantees and parent company guarantees; export credit support; testing, commissioning and acceptance regimes; and arbitration provisions (including governing law and seat). It is also cited in due diligence and comparative benchmarking on nuclear project finance, security packages and contractor solvency risk. Usage is broadly consistent across England and Wales, Scotland, Northern Ireland and Ireland. Also referred to as Olkiluoto 3. See Olkiluoto.