Ryan K. Lighty
Ryan K. Lighty represents and advises clients regarding litigation, transactions, and regulatory matters related to the ownership and use of nuclear reactors and nuclear materials. He serves as co-leader of the firm’s Nuclear Working Group and regularly guides clients on complex issues associated with US Nuclear Regulatory Commission (NRC) licensing, administrative litigation, and regulatory compliance. His practice is focused primarily on new reactor deployments, operating license renewals, and regulatory consents for transactions involving nuclear assets. In the last decade, Ryan has represented and defended applicants in more administrative litigation proceedings before the NRC than any other lawyer in the United States.
Ryan’s experience with the National Environmental Policy Act (NEPA) and working knowledge of the NRC’s technical and financial requirements allow him to assist clients on a wide range of projects, from the development and construction of new reactors to restarts and life extensions for existing ones. He serves on the Nuclear Energy Institute’s (NEI’s) License Renewal Environmental Task Force and has advised utilities and independent power producers on most of the subsequent license renewal (SLR) applications filed with the NRC to date.
Ryan also serves on NEI’s Siting Task Force for new reactor projects. He regularly counsels a range of clients (including investors, reactor technology vendors, and project sponsors) on NRC requirements associated with construction permits, operating licenses, combined licenses (COLs), early site permits (ESPs), design certifications (DCs), and other regulatory pathways for deployment of small modular reactors (SMRs), advanced reactors, micro-reactors, and large light-water reactors. In addition to guiding many traditional utilities and merchant power generators, he also provides strategic advice to end users regarding the deployment of carbon-free nuclear energy to power data centers, industrial campuses, and other large-load facilities.
Before joining Morgan Lewis, Ryan was an attorney in the NRC’s Office of the General Counsel and served as acting regional counsel in the agency’s Region III office.
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Up & Atom
Legal and Policy Trends in Nuclear Energy
- Subsequent License Renewal: Represented power reactor owners and operators on two-thirds (8 of 12) of the NRC Subsequent License Renewal (SLR) applications that have been approved by the NRC as of April 2026, allowing the plants to continue producing carbon-free electricity for 60–80 years beyond their initial licensing dates
- Advanced Reactors: Represented project sponsors and reactor designers on multiple advanced reactor projects (including SMRs and micro-reactors) across various pre-application and application review activities and associated administrative litigation, including both (2 of 2) ARDP demonstration reactor projects and all (4 of 4) construction permits for non-light water reactors that have been issued by the NRC as of April 2026
- Complex Nuclear Materials Licenses: Represented a joint venture in obtaining an NRC license to construct and operate a consolidated interim storage facility for spent nuclear fuel in Southwest Texas, including defense of the license before the US Supreme Court
- Transactions Involving Nuclear Assets: Represented numerous current and prospective owners and operators of nuclear reactors and materials facilities in commercial transactions (M&A, corporate restructuring, and joint ventures) as to regulatory consents to transfer control of NRC licenses and other nuclear-specific considerations, including insurance and liability matters, decommissioning trust fund requirements, and foreign ownership restrictions
- Duke University, 2014, Certificate in the National Environmental Policy Act
- Indiana University School of Law, 2011, J.D., cum laude
- Indiana State University, 2003, B.S.
- District of Columbia
- New York
- US Supreme Court
- US Court of Appeals for the District of Columbia Circuit
- US Court of Appeals for the Fifth Circuit
- US Court of Appeals for the Ninth Circuit
- US Court of Appeals for the Tenth Circuit
Ranked, Energy – Renewables, Lexology (2026)
Ranked, Energy: Nuclear (Regulatory & Litigation), USA, Chambers Global (2026)
Up and Coming, Energy & Nuclear (Regulatory & Litigation), Nationwide, Chambers USA (2025)
Listed, The Best Lawyers in America, Ones to Watch, Energy Law, Washington, DC (2021–2025)
Rising Star, Washington, DC Super Lawyers (2018–2022)
Member, Nuclear Energy Institute, License Renewal Environmental Task Force
Member, Law Firm of the Year, Energy/Projects: Power (including Renewables), Chambers USA (2018)
Member, Practice Group of the Year, Energy, Law360 (2016, 2019)
Member, Energy Law Firm of the Year, US News & World Report/Best Lawyers (2015)
Executive Managing Editor, Indiana International & Comparative Law Review (2010–2011)
Member, American Bar Association (ABA)
Member, ABA Infrastructure and Regulated Industries Section (IRIS)
Member, ABA-IRIS Nuclear Energy Committee
Member, ABA Section of Energy, Environment, and Resources (SEER)
Vice Chair, ABA-SEER Nuclear Law Committee
Member, Phi Delta Phi International Legal Honor Society