Antinuclear

The Small Reactor That Isn’t So Small: Why the SMR Dream Deserves Much Greater Scrutiny

National Herald, https://www.facebook.com/permalink.php?story_fbid=pfbid02vhW9RCrQdNjmM9VLxerw1cHa3awLJ9KFFyQDnpDjYzakRJW577vxCQcf6iJd97hAl&id=100063537605071&rdid=i8qv8opWWLIfSevN#

For years, the nuclear industry has promoted Small Modular Reactors (SMRs) as the technology that will finally overcome the traditional objections to nuclear power. They are marketed as smaller, cheaper, faster to build and safer than conventional nuclear power stations. The implication is that they represent a revolutionary new generation of nuclear energy.

As Noel Wauchope argues in the Australian Independent Media Network (AIMN), reality appears far more complicated.

The first point worth making is almost semantic, yet enormously important. While SMRs are indeed modular—constructed from factory-built components that are transported and assembled on site—they often cease to be genuinely small once deployed commercially.

Individual reactor modules may produce between 50 and 300 megawatts of electricity, but commercial operators are rarely proposing to build just one module. Instead, they intend to cluster multiple reactors together to create generating stations approaching the size of today’s conventional nuclear plants.

The “small” reactor quickly becomes a very large power station.

The American lesson: NuScale

NuScale has long been presented as the flagship of Western SMR development. It became the first SMR design to receive certification from the United States Nuclear Regulatory Commission and attracted more than US$1 billion in federal support.

The original Utah Associated Municipal Power Systems project planned to build twelve reactor modules producing around 924 megawatts—comparable to a conventional nuclear station.

As costs escalated, the project was scaled back to six modules generating approximately 462 megawatts. Yet even after halving its size, estimated costs continued rising dramatically.

Eventually, in late 2023, the project was cancelled altogether.

For many observers, this was a significant setback. The project intended to prove that SMRs could be commercially competitive instead demonstrated how difficult it remains to deliver nuclear projects within acceptable cost limits.

NuScale continues promoting its VOYGR design internationally, but it still has no operating commercial reactor producing electricity for customers.

Britain now hopes to succeed where America stumbled

The United Kingdom is pursuing a different technological pathway through X-energy’s Xe-100 reactor.

Rather than using conventional light-water technology, the Xe-100 is a high-temperature gas-cooled reactor employing TRISO fuel particles contained within pebble-bed fuel assemblies.

Supporters argue this design offers inherent safety advantages because the reactor cannot experience the type of catastrophic core meltdown associated with accidents such as Fukushima or Chernobyl.

However, as Noel Wauchope points out, this is also effectively a first-of-its-kind commercial deployment.

The proposed Hartlepool development would consist of twelve reactor modules producing around 960 megawatts—again, hardly what most Australians would consider a “small” power station.

Like the NuScale project before it, success depends upon proving not only that the technology works but that it can attract sustained private investment while remaining commercially competitive.

Safety is only one part of the equation

Modern reactor designs undoubtedly incorporate significant safety improvements over earlier generations.

That does not mean legitimate questions disappear.

Large multi-module sites would still contain substantial quantities of radioactive material requiring long-term management and security. Operators must also protect facilities against cyber threats, physical sabotage and the consequences of natural disasters.

TRISO fuel itself remains the subject of ongoing technical debate. While advocates emphasise its resilience under extreme temperatures, critics note that manufacturing is complex, expensive and creates different waste management challenges compared with conventional reactor fuel.

These are not arguments against research.

They are arguments for careful examination rather than marketing slogans.

Economics remains the unanswered question

Perhaps the greatest challenge facing SMRs is not engineering but economics.

Almost every Western SMR project currently depends upon significant government assistance through grants, loan guarantees or direct public investment.

That reality raises an obvious question.

If the technology is destined to become a low-cost commercial revolution, why has private investment remained so cautious?

The NuScale experience suggests that once detailed engineering, financing and construction costs are fully accounted for, the economic advantages often promoted during the conceptual stage become far less certain.

Britain’s Hartlepool proposal now carries the burden of demonstrating that commercial SMRs can succeed where previous projects have struggled.

Australia’s debate should remain grounded in evidence

Australia’s discussion about nuclear energy deserves to be conducted on evidence rather than optimism or ideology.

Supporters argue SMRs could provide reliable low-emissions electricity and complement renewable generation.

Critics—including Noel Wauchope and many contributors to the Australian Independent Media Network—counter that the industry has yet to demonstrate it can consistently deliver affordable, commercially viable projects without extensive public subsidy.

That is not an anti-science position.

It is a request for proof.

Before Australians commit tens of billions of taxpayer dollars to an industry that has yet to establish a successful commercial SMR fleet anywhere in the Western world, it is reasonable to ask whether the promises match the evidence.

The central message emerging from Noel Wauchope’s analysis is simple.

Small Modular Reactors may indeed be modular.

Whether they are genuinely small, economically competitive or capable of transforming the world’s energy systems remains very much an open question.

For Australia, where abundant renewable resources already exist alongside rapidly improving energy storage technologies, those questions deserve rigorous examination before SMRs are embraced as the next great energy solution.

National Herald

My COMMENT The nuclear lobby is desperate to keep and gain technical and expert workers. It’s had a bit of a problem with aging and retiring experts. To make the industry appeal to the young, it really needs to maintain that (completely artificial) separation of “peaceful nuclear” from nuclear weapons. Not to mention that general need for community acceptance of nuclear energy as climate solution etc. So the SMRs are just really a front, a foot in the door for the nuclear weapons industry. So I think they don’t care how much it costs. So much easier in totalitarian states, democracy is such a bloody nuisance.

August 13, 2026 Posted by Christina Macpherson | Uncategorized | Leave a comment