Plans for nuclear-powered merchant ships must confront risks

The shipping industry seeks low-carbon alternatives to meet its net-zero emissions target by 2050. Battery power suffices for ferries and harbor vessels, while methanol and hydrogen face challenges in sustainability, safety, and storage. Nuclear reactors emerge as a viable solution, generating no direct carbon emissions and eliminating the need for excessive fuel storage.

Nuclear power could enhance ship speed and reduce annual marine fuel costs and carbon taxes. A new generation of nuclear-powered commercial ships may enter service within the next decade, with interest from industry and governments surging. The United States' Maritime Administration invited public input on small modular reactor systems for marine use, and China plans to build the world's first thorium-powered container vessel by 2035.

However, the deployment of nuclear-powered ships raises significant safety concerns, such as potential hijacking, grounding, or missile attacks. Robust regulations and international coordination are essential to ensure the safe and effective implementation of nuclear-powered merchant vessels. The International Atomic Energy Agency (IAEA) and the International Maritime Organization (IMO) are working on developing unified frameworks for reactor licensing, ship certification, port entry, and emergency response.

Despite the global nuclear fleet's decline since the Cold War, nuclear submarines and civil icebreakers demonstrate the technology's capability to operate in harsh maritime environments for extended periods. Nonetheless, the commercial application of nuclear power on merchant vessels remains a complex challenge, requiring careful consideration and international cooperation to mitigate risks and ensure safe operation.