India Joins IAEA Maritime Nuclear Initiative to Explore Nuclear-Powered Commercial Ships and Floating Power Plants

India has joined a major international effort to explore the peaceful use of nuclear energy at sea, opening a potential new technological pathway for nuclear-powered commercial ships, floating power stations and reliable offshore energy systems.

The initiative, called Atomic Technologies Licensed for Applications at Sea (ATLAS), was launched by the International Atomic Energy Agency in Washington on August 26, 2026. India participated in the ministerial-level launch through Atomic Energy Commission Chairman and Department of Atomic Energy Secretary Dr. Ajit Kumar Mohanty, placing the country among nations examining how advanced nuclear reactors could eventually be integrated into civilian maritime infrastructure.

ATLAS is intended to bring together two industries that have traditionally developed within largely separate regulatory environments — nuclear energy and commercial shipping. Its objective is to create international cooperation around the technical, regulatory, safety, security and safeguards requirements needed before civilian nuclear technologies can be deployed extensively at sea.

One of the most significant possibilities is the use of Small Modular Reactors for commercial ship propulsion. Unlike conventional merchant vessels powered by diesel or other fossil fuels, a nuclear-powered commercial vessel could potentially operate for long periods without conventional refuelling while producing extremely low operational carbon emissions.

Nuclear propulsion is already well established in military vessels such as submarines and aircraft carriers, but widespread application to civilian shipping presents a very different regulatory and commercial challenge. Commercial vessels routinely travel between countries, enter foreign ports, change ownership and operate under different maritime jurisdictions. A nuclear-powered merchant ship would therefore require internationally accepted rules covering reactor safety, nuclear security, liability, emergency response, fuel handling, port access and safeguards.

ATLAS is intended to begin creating the international framework through which these issues can be addressed systematically.

For India, the initiative has particular relevance because of the country’s long coastline, extensive island territories and rapidly expanding commercial maritime sector. Small modular reactors could potentially serve both offshore energy installations and, over the longer term, civilian vessels operating on major shipping routes.

Floating nuclear power plants represent another important area under consideration. Instead of constructing a conventional nuclear station entirely on land, a reactor could be installed on a purpose-built floating platform or vessel and positioned near a coastal industrial region, island or remote community.

Such systems could potentially provide continuous electricity to locations where building large terrestrial power infrastructure is difficult. They could also supply energy to ports, industrial clusters, offshore facilities and isolated regions without requiring extensive fuel deliveries.

For India, this possibility could eventually have relevance to island territories and coastal industrial development. The country has numerous offshore islands and a long coastline containing major ports, refineries, steel plants, petrochemical complexes, shipyards and other energy-intensive industries.

Small reactors deployed close to these demand centres could potentially provide continuous low-carbon electricity while reducing pressure on terrestrial transmission networks. However, such applications would require extensive technical evaluation and regulatory approval before deployment.

India’s participation in ATLAS comes at an important stage in the transformation of its domestic nuclear programme. The government has set a target of reaching 100 GW of nuclear power capacity by 2047, substantially expanding nuclear energy’s contribution to India’s electricity system.

Small modular reactors are expected to become an important component of that strategy. India aims to develop and operationalise at least five indigenous SMRs by 2033, with the Bhabha Atomic Research Centre working on several reactor configurations.

These include the 220 MWe Bharat Small Modular Reactor, a smaller 55 MWe SMR, and a high-temperature gas-cooled reactor designed partly around applications such as hydrogen production.

The technologies are being examined for use in captive power generation for energy-intensive industries, replacement of retiring fossil-fuel power plants and electricity supply to remote or off-grid regions. Maritime and offshore applications could eventually extend this potential deployment landscape considerably further.

India’s nuclear sector has also entered a new policy environment following the enactment of the Sustainable Harnessing and Advancement of Nuclear Energy for Transforming India Act, or SHANTI Act. The legislation has opened wider parts of civilian nuclear power development to participation by Indian private companies and joint ventures under government licensing and nuclear safety regulation.

This creates the possibility of a much larger industrial ecosystem developing around nuclear engineering, manufacturing, construction and specialised services as India moves towards its 2047 target.

Maritime nuclear technology could eventually add shipbuilders, marine engineering companies, port operators and shipping firms to that ecosystem. Building a commercially viable nuclear-powered vessel would require expertise extending across reactor engineering, naval architecture, propulsion, shielding, safety systems, control technologies and maritime regulation.

India already possesses substantial nuclear engineering capability and a large shipbuilding industry. Combining these strengths could eventually create opportunities in an entirely new category of civilian maritime technology.

The potential environmental impact is also significant. International shipping carries most of global merchandise trade but remains heavily dependent on fossil fuels. Large merchant vessels require enormous quantities of fuel and operate continuously across long distances, making maritime transport particularly difficult to decarbonise.

Battery-electric propulsion is practical for some short-distance vessels but becomes considerably more challenging for large ocean-going ships because of the amount of energy that would need to be stored onboard. Alternative fuels such as green ammonia, methanol and hydrogen are being developed, but each presents its own infrastructure, storage and production challenges.

Nuclear propulsion offers a fundamentally different solution. A compact reactor contains an exceptionally concentrated energy source capable of operating for long periods, potentially allowing a vessel to travel great distances without routine conventional fuel bunkering.

This could also produce operational advantages. Ships would no longer need to devote the same volume and weight to conventional fuel, potentially allowing more cargo capacity or greater operational range. High and sustained propulsion power could theoretically support faster vessels without the enormous fuel consumption associated with conventional engines.

These advantages must nevertheless be balanced against considerable technical and regulatory challenges.

A maritime reactor must remain safe during storms, collisions, groundings and other marine accidents. Nuclear material must remain secure during international voyages. Emergency procedures would have to account for incidents occurring far from specialised nuclear facilities, while ports would need clearly defined rules for receiving nuclear-powered commercial vessels.

Questions of liability would become particularly complex if an incident involved a ship registered in one country, operated by a company in another and located within the territorial waters of a third.

Decommissioning, spent-fuel management, maintenance and safeguards would also require internationally harmonised procedures.

Floating nuclear power plants present similarly distinct requirements because a reactor located at sea faces different physical, security and environmental risks from one constructed deep within a terrestrial nuclear site.

The IAEA’s role is therefore essential. Instead of individual countries developing incompatible regulatory regimes independently, ATLAS is intended to bring governments, nuclear regulators, maritime authorities, reactor developers, shipping companies, ports and international organisations together around common approaches.

The Washington launch brings together hundreds of representatives from more than 50 countries, illustrating how rapidly interest in maritime nuclear applications is expanding.

India has indicated that it is prepared to contribute its experience in indigenous reactor technology, nuclear fuel-cycle capabilities, peaceful nuclear applications and capacity building to the initiative.

The country has spent decades developing a largely indigenous nuclear technology base spanning uranium and thorium research, pressurised heavy-water reactors, fast breeder technology, fuel fabrication, reprocessing and advanced reactor development. That accumulated expertise provides India with a foundation from which it can participate in emerging international work on smaller and more flexible reactor systems.

India’s involvement in ATLAS should not be interpreted as an announcement that nuclear-powered Indian merchant ships or floating reactors are about to enter service. The initiative remains focused on developing the technological, safety and regulatory foundations necessary for future deployment.

The commercial viability of maritime reactors will ultimately depend on reactor cost, ship design, international regulation, insurance, port acceptance and whether nuclear propulsion can compete economically with alternative low-carbon maritime fuels.

Nevertheless, India’s decision to participate places it at the beginning of an important technological transition rather than waiting for standards to be established elsewhere.

If small modular reactor technology matures as expected, nuclear energy could eventually move beyond conventional power stations and become part of the infrastructure supporting ships, islands, ports, offshore facilities and coastal industry.

For India, this convergence between its Nuclear Energy Mission and rapidly expanding maritime economy creates an unusual strategic opportunity. The country is simultaneously building indigenous small reactors, opening its civilian nuclear industry to broader industrial participation, expanding shipbuilding capacity and developing its ports and commercial fleet.

ATLAS provides a global platform through which these separate capabilities could eventually intersect.

India’s participation therefore represents more than involvement in another international nuclear forum. It places the country inside the emerging global effort to determine how nuclear technology could contribute to the next generation of commercial shipping and offshore energy — potentially extending India’s nuclear ambitions from power stations on land to the world’s oceans.

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references:

U.S. Department of Energy — IAEA ATLAS launch, 26–27 August 2026 ·

IAEA — ATLAS initiative listing ·

PIB/Department of Atomic Energy — Nuclear Energy Mission for Viksit Bharat

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