Nuclear energy is re-emerging as a central, yet naturally controversial, component in the global shift away from fossil fuels toward lower-carbon energy systems. As governments accelerate climate targets and electrification efforts, nuclear power is increasingly being reconsidered alongside renewables such as wind and solar.
Supporters argue that nuclear energy offers a reliable, low-carbon source of electricity capable of operating continuously, unlike intermittent renewables, which is seen as particularly valuable for stabilizing grids as coal and natural gas plants are phased out.
Renewable technologies based on wind and solar have seen rapid cost declines over the past decade, making them more attractive in many markets. However, small modular nuclear reactors (SMRs) promise lower upfront costs and faster deployment, but they are still in early stages of commercialization.
Safety concern is naturally a major issue. High-profile accidents in the past, notably Chernobyl and Fukushima, have left a lasting imprint of fear. Although modern reactor designs incorporate advanced safety features, with lower risk of catastrophic failure, safety remains a major point of debate. Additionally, the long-term storage of radioactive waste presents unresolved technical and political challenges.
Still, nuclear energy’s low lifecycle emissions make it a strong candidate for decarbonization strategies, particularly in regions with limited renewable resources or high energy demand.
Critics counter that investment in nuclear energy may divert resources from faster-to-deploy renewable solutions and grid improvements, including energy storage and demand management. They argue that a fully renewable system, supported by batteries, hydrogen, and smarter grids, could ultimately provide a safer and more flexible alternative.
Nevertheless, the fact that new technology offers the possibility of smaller, more manageable and safer reactors together with the increasing demand for electrical energy and the lack of alternatives, has led to increasing interest in nuclear solutions.
The small modular reactors (SMRs) have power capacity up to 300 MW(e) per unit and also comprise microreactors with power up to 10 MW(e). The primary advantages for SMEs are size and inherent safety as well as capital costs and little land use. It is also claimed that advanced fast reactors could potentially use existing nuclear waste as fuel, decreasing the long-term environmental burden.
On the other hand, the challenges and criticism raised include:
Cost of the produced energy,
May need high-enriched uranium, with concerns about nuclear security.
The need for multiple units compared to one large plant, potentially diversify the safety risk.
Deployment delays due to regulatory hurdles in getting their first units powered up.
While some American companies as Google, Amazon, and Microsoft have shown interest to power AI data centers, the industry has yet to see widespread deployment of SMRs.
More information about this theme may be seen e.g. here and here
(This article is triggered by various articles posted on the internet; edited by T.Sollie)