The International Maritime Organization (IMO) has reaffirmed its goal for global shipping to achieve net-zero emissions by 2050, emphasizing the importance of innovative propulsion technologies. Nuclear propulsion offers a promising, though complex, solution to meet these targets, especially as the industry explores sustainable and low-emission alternatives.
IMO’s decarbonization efforts include a minimum 20% reduction in greenhouse gas (GHG) emissions from international shipping by 2030, with a broader aim of zero emissions by 2050. The FuelEU Maritime Regulation, applicable within the European Union and the European Economic Area, mandates a 2% reduction in GHG emission intensity by 2025, escalating to 80% by 2050. It requires ships over 5,000 gross tonnage to meet “well-to-wake” emission standards, considering the entire fuel lifecycle.
Shipowners are exploring various decarbonization options, such as wind propulsion, advanced hull designs, exhaust gas cleaning systems, and alternative fuels like ammonia, hydrogen, and biofuels. These alternatives pose logistical and technical challenges, including storage issues, toxicity concerns (notably with ammonia), retrofitting costs, and port infrastructure limitations. A recent survey by the Global Centre for Maritime Decarbonization indicated that many industry players plan to deploy multiple fuel types by 2030, emphasizing a multi-fuel strategy for flexibility and resilience.
Nuclear propulsion remains a compelling, yet controversial, option. Currently used in icebreakers and naval vessels, the advent of Small Modular Reactors (SMRs) offers a new pathway. SMRs operate at lower pressures, reducing safety risks compared to traditional reactors. The NuProShip initiative, launched in January 2025, investigates Generation IV SMRs for maritime applications. Norwegian shipbuilder VARD highlighted the role of insurance companies in assessing the commercial viability of nuclear-powered ships.
However, several challenges hinder widespread adoption. The historic example of the NS Savannah (launched in 1962) showed high operational costs that limited commercial success. Modern advances aim to address these issues, but substantial investments are still needed. Regulatory frameworks are evolving; the UK’s Merchant Shipping (Nuclear Ships) Regulations 2022 provide a safety foundation, but international standards are still under development. The International Atomic Energy Agency (IAEA)’s 2025 initiative seeks to establish a comprehensive global framework for civil nuclear maritime applications, including safety and liability protocols.
Insurance sectors will also need to adapt. New risk models, liability clauses, and coverage options are essential for nuclear shipping, given the potential for accidents and environmental impacts. The increased value of ships and port infrastructure due to nuclear technology will influence risk assessments and underwriting strategies.
Organizations like NEMO (Nuclear Energy Maritime Organization) play a vital role in fostering collaboration among stakeholders, promoting safe, sustainable nuclear maritime solutions. While nuclear propulsion offers a transformative potential, its success depends on technological, regulatory, and economic progress, supported by international cooperation.
