Can Small Modular Reactors Safely Power Singapore's Energy Future?

Singapore faces an important challenge: how can a small, densely populated country secure reliable electricity while moving toward a low-carbon future? Today, approximately 95% of Singapore's electricity comes from imported natural gas, making energy security a major national priority. With limited land for renewable energy and growing electricity demand, the country is exploring alternative sources of dependable, low-carbon power. One technology attracting attention is the Small Modular Reactor (SMR), a newer type of nuclear reactor designed to generate electricity on a smaller scale than conventional nuclear power plants.

Small Modular Reactors could help Singapore diversify its energy mix, reduce exposure to fossil fuel price fluctuations, and support its net-zero emissions ambition for 2050. However, nuclear energy also raises important questions about radiation, radioactive waste, emergency preparedness, construction costs, and public safety. These concerns are especially significant in Singapore, where residential areas, industrial facilities, and critical infrastructure occupy a relatively small geographical area.

Can Small Modular Reactors safely power Singapore's energy future? Potentially, but their suitability must be proven through rigorous technical assessments, independent safety reviews, and careful economic evaluation. As of October 2026, Singapore has not decided to adopt nuclear energy. Instead, the government is developing the expertise needed to determine whether advanced nuclear technologies could be deployed responsibly in the future.

1. What Are Small Modular Reactors?

Small Modular Reactors are nuclear reactors designed to generate up to approximately 300 megawatts of electricity per module under the commonly used international definition. Compared with conventional nuclear power plants, SMRs generally have smaller individual generating capacities and may use factory manufacturing to simplify construction and installation.

Some SMR designs incorporate passive safety systems that use natural circulation, gravity, and other physical processes to help remove heat without depending entirely on powered equipment. Certain advanced designs also aim to reduce the likelihood or consequences of serious accidents.

However, not all SMRs use the same technology, and smaller reactors are not automatically safer. Each design must demonstrate that it can control reactor temperatures, protect nuclear fuel, contain radioactive materials, and withstand relevant external hazards.

For Singapore, the most important consideration is whether a particular reactor can meet the country's demanding safety, environmental, and economic requirements.

2. Why Is Singapore Exploring Nuclear Energy?

Singapore has limited domestic energy resources and depends heavily on imported natural gas. This dependence exposes the country to international fuel prices, geopolitical tensions, and potential supply disruptions.

Solar energy remains an important part of Singapore's decarbonisation strategy, but limited land and variable sunlight constrain its contribution. The government estimates that solar power could meet around 10% of Singapore's electricity needs by 2050. These limitations encourage the country to explore other low-carbon energy sources. (Source: Singapore government's nuclear energy explainer.)

Nuclear power could provide a dependable source of electricity regardless of weather conditions, except during maintenance or unexpected outages. It could also diversify the country's energy supply while supporting industries that require consistent electricity.

Singapore is not committing to nuclear power by studying SMRs. Instead, it is assessing whether the technology could become a practical option alongside solar energy, regional electricity imports, energy storage, and other low-carbon solutions.

3. Are Small Modular Reactors Safe Enough for Singapore?

Safety is the most important consideration when evaluating nuclear energy for Singapore.

Some SMRs incorporate passive cooling systems, compact reactor arrangements, and other engineering features intended to reduce accident risks. Certain designs may also contain less radioactive material within an individual reactor than larger conventional units.

These characteristics could offer safety advantages, but they do not eliminate nuclear hazards. Reactors must still manage residual heat after shutdown, prevent fuel damage, protect containment structures, and control radioactive releases during potential emergencies.

Safety assessments must also consider earthquakes, flooding, extreme weather, equipment failures, human error, cybersecurity threats, and physical security. The relevant hazards will depend on the reactor design and its proposed location.

Singapore should therefore evaluate individual SMR designs rather than assume that every small reactor is inherently safe. Independent experts must establish whether the technology can meet stringent safety requirements under realistic operating conditions and credible accident scenarios.

4. Can SMRs Operate Safely in a Densely Populated City-State?

Singapore's limited land area presents a major challenge for nuclear power deployment.

A nuclear facility requires appropriate siting, security arrangements, emergency access, radiation monitoring, and measures to protect nearby communities. Depending on the reactor design and its safety assessment, authorities may also need designated emergency planning zones.

SMRs may potentially support smaller emergency planning zones than some conventional reactors, but this cannot be assumed for every design. The size of any required buffer zone must follow a rigorous assessment of the reactor's characteristics, potential accident scenarios, and applicable regulatory requirements.

Singapore would need to evaluate whether a proposed site could protect residents, workers, surrounding infrastructure, and the environment during normal operations and emergencies.

The government has stated that it is too early to establish buffer-zone requirements or identify potential underground or offshore deployment locations because no decision has been made to deploy nuclear energy.

If no suitable site can satisfy the necessary safety requirements, Singapore should not proceed with construction.

5. How Could SMRs Improve Singapore's Energy Security?

SMRs could strengthen Singapore's energy security by reducing its dependence on a single dominant electricity-generation fuel.

Nuclear fuel has a high energy density, meaning relatively small quantities can produce substantial amounts of electricity. Fuel procurement and storage arrangements could help reduce exposure to short-term natural gas market disruptions.

A nuclear facility could also provide continuous low-carbon electricity to support homes, businesses, data centres, and advanced manufacturing industries.

However, nuclear power would not make Singapore completely energy independent. The country would still rely on international suppliers for nuclear fuel, specialised components, technical services, and potentially waste-management arrangements.

The electricity grid would also need sufficient backup capacity to manage reactor maintenance or unexpected outages.

Consequently, the strongest argument for SMRs is energy diversification. Nuclear power could complement natural gas, solar energy, regional electricity imports, storage technologies, and energy efficiency rather than replace every other source.

6. Can SMRs Help Singapore Reach Net-Zero Emissions by 2050?

Nuclear energy produces electricity without directly emitting carbon dioxide during the fission process. Although mining, fuel processing, construction, and decommissioning generate emissions, nuclear power generally has a low lifecycle greenhouse gas footprint compared with fossil-fuel electricity generation.

SMRs could therefore contribute to Singapore's climate goals by supplying reliable, low-carbon electricity. This could become increasingly important as the country expands digital infrastructure, electrifies transport, and develops advanced industries.

Some advanced reactor designs may also provide industrial heat or support hydrogen production, although these applications would depend on the specific technology and economic conditions.

Nevertheless, nuclear energy is not the only pathway to decarbonisation. Singapore can continue developing solar power, importing low-carbon electricity, improving energy efficiency, and exploring storage and other grid technologies.

The government should compare these options using consistent assessments of emissions, reliability, cost, environmental impact, and deployment timelines. SMRs should be adopted only if they offer meaningful benefits relative to other feasible alternatives.

7. What Are the Main Challenges of SMRs?

Several challenges must be addressed before SMRs could become a viable part of Singapore's energy system.

Radioactive waste: Nuclear reactors generate radioactive waste that requires secure handling, storage, transportation, and long-term management. Singapore would need a credible waste-management strategy covering the facility's entire lifecycle.

Construction costs: Factory manufacturing could eventually improve construction efficiency, but SMR projects may face high initial costs, financing difficulties, regulatory delays, and limited commercial operating experience. Their long-term electricity costs remain dependent on the specific design and project conditions.

Cybersecurity and physical security: Nuclear facilities require protection against sabotage, unauthorised access, cyberattacks, and other security threats. Singapore would need specialised expertise, robust regulations, and reliable security systems.

Emergency preparedness: Authorities must develop clear procedures for radiation monitoring, public communication, protective actions, and coordination among emergency services. Plans must reflect Singapore's population density and interconnected infrastructure.

Public acceptance: Residents need transparent information about the benefits, risks, costs, and responsibilities associated with nuclear power. Public confidence depends on credible oversight, accountability, and open communication.

Addressing these challenges requires more than advanced reactor technology. Singapore would also need capable institutions, trained personnel, effective regulation, and a strong safety culture.

8. What Is Singapore Doing to Assess SMR Technology?

Singapore is gradually developing its nuclear science, safety, and regulatory capabilities.

In March 2026, Singapore's Energy Market Authority signed a memorandum of understanding with Korea Hydro & Nuclear Power to cooperate on SMR studies, workforce training, and technical knowledge-sharing. This partnership supports Singapore's efforts to assess advanced nuclear technologies without committing to deployment.

The government is also preparing for the International Atomic Energy Agency's Integrated Nuclear Infrastructure Review (INIR) Phase 1 Mission, which is scheduled to begin in 2027.

The review will assess Singapore's readiness across 19 areas, including nuclear safety, radioactive waste management, emergency planning, radiation protection, and stakeholder involvement. Its purpose is to determine whether Singapore has the expertise, institutions, and frameworks needed to make an informed decision.

According to the government's October 2026 update, the review could conclude toward the end of 2027 or in 2028. Singapore intends to share the independent findings and provide an opportunity for public feedback.

Importantly, the review does not approve a nuclear power plant or require Singapore to proceed with nuclear energy.

9. What Must Happen Before Singapore Deploys an SMR?

Before considering construction, Singapore should require evidence that a specific reactor design can operate safely under local conditions.

The country would need independent regulatory oversight, a suitable site, emergency response arrangements, nuclear security measures, and a credible long-term radioactive waste strategy. It would also need a realistic assessment of construction costs, financing, fuel supply, operating expenses, and decommissioning.

Public engagement should be part of the process from the beginning. Residents should understand the proposed technology, its risks, and the reasons behind any eventual decision.

Finally, Singapore must compare SMRs with other low-carbon energy options. If the technology cannot meet the country's safety requirements or offers insufficient economic and environmental benefits, the government should pursue alternatives.

Conclusion

Small Modular Reactors could potentially help Singapore build a more secure, reliable, and sustainable energy future. Their ability to provide low-carbon electricity, diversify fuel sources, and incorporate advanced safety features makes them worth investigating. However, their smaller size does not eliminate the risks associated with nuclear power or guarantee lower costs.

Singapore's cautious approach is therefore appropriate. Through technical studies, international cooperation, regulatory development, and the planned IAEA review, the country can determine whether SMRs are genuinely suitable for its circumstances.

Ultimately, the question is not whether Singapore should adopt nuclear energy simply because the technology exists. It is whether a specific reactor can meet the country's demanding safety standards, provide reliable and affordable electricity, and deliver meaningful environmental benefits.

If the evidence supports deployment, SMRs may become part of Singapore's future energy mix. If it does not, the country should continue pursuing other viable low-carbon solutions. Safety, reliability, affordability, and environmental sustainability must remain the deciding factors.

Frequently Asked Questions

Can Small Modular Reactors safely power Singapore?

Potentially, but only if a specific reactor design demonstrates that it meets Singapore's strict safety, regulatory, environmental, and economic requirements. No decision to deploy nuclear energy has been made.

Why is Singapore interested in SMRs?

Singapore depends heavily on imported natural gas and has limited land for renewable energy generation. SMRs could provide another source of reliable, low-carbon electricity.

Are SMRs safer than conventional nuclear reactors?

Some designs incorporate passive safety systems and other features intended to reduce accident risks. However, safety depends on the individual reactor design, its location, operating procedures, and regulatory oversight.

What are the biggest risks of SMRs in Singapore?

The main concerns include population density, site suitability, radioactive waste, emergency preparedness, cybersecurity, construction costs, and public acceptance.

When will Singapore decide whether to adopt nuclear energy?

There is no confirmed deployment decision date. Singapore plans to undertake the IAEA INIR Phase 1 review starting in 2027, with the assessment potentially concluding in late 2027 or 2028.

Can SMRs help Singapore achieve net-zero emissions by 2050?

They could contribute by supplying low-carbon electricity, but their role will depend on their safety, commercial maturity, affordability, and suitability compared with other energy options.

While Singapore is a nuclear-free zone, understanding potential radiation risks is crucial. Our detailed guide explores these risks, outlines Singapore's safety frameworks, and highlights singaporenuclear.com as a key resource for PPE and radiation hardware for enhanced preparedness.