By Tim Harding on September 15, 2026
Australia’s debate over nuclear power is often confused because two quite different arguments are treated as though they were the same. One is an economic argument: that nuclear power is currently too expensive, too slow to build and unnecessary given Australia’s renewable-energy resources. The other is an ideological argument: that nuclear power is inherently undesirable and should therefore remain prohibited regardless of its future cost, safety or technological development.
These positions may lead to the same immediate conclusion — that Australia should not build nuclear power stations now — but they rest on very different reasoning.
The economic case is, at least in principle, empirical. It depends on such questions as construction costs, financing, operating expenses, plant life, transmission requirements, storage, system reliability and the comparative costs of alternatives. If nuclear power costs substantially more than renewable generation backed by storage, hydro and other firming capacity, then there is a perfectly respectable economic argument against building it.
But economic arguments are contingent. Technologies change. Costs change. Electricity systems change. What is uneconomic today may become competitive in twenty years, just as technologies that were once prohibitively expensive can become commonplace. Small modular reactors may or may not fulfil their promises, but that is an empirical question rather than an article of faith.
An ideological objection is different. It begins from the proposition that nuclear power is itself undesirable. Historically, Australian anti-nuclear politics emerged partly from the environmental movement, the peace movement, opposition to nuclear weapons and opposition to uranium mining. Nuclear weapons, uranium exports, radioactive waste and civilian nuclear electricity were often regarded as elements of a single “nuclear” problem.
That history still influences Australian politics. Some opponents of nuclear energy do not merely argue that it is presently uneconomic. They favour maintaining a legal prohibition against nuclear power. That is a much stronger position. If nuclear power is certain to be uneconomic, there should be little need to prohibit it. Investors will not voluntarily build power stations that cannot compete.
This reveals the central inconsistency in much of the debate. If the argument against nuclear energy is genuinely economic, then the appropriate response is not prohibition but competition. Remove the legislative ban, establish rigorous safety and environmental regulations, and require nuclear proponents to demonstrate that their projects can meet the same commercial and regulatory standards as other forms of electricity generation.
If they cannot, the projects will not proceed. No ideological prohibition is required.
Conversely, if opponents insist that nuclear power must remain illegal even if it were someday shown to be economically competitive, reliable and acceptably safe, then their objection is no longer primarily economic. It is a philosophical or ideological judgement about nuclear technology itself.
There is nothing inherently illegitimate about making such a judgement. Democratic politics inevitably involves values as well as economics. People may reasonably attach particular weight to radioactive waste, accident risk, nuclear proliferation or environmental concerns. But those arguments should be stated openly rather than disguised as purely economic objections.
This distinction matters because economic reasoning should remain open to evidence. Suppose future reactor technology dramatically reduced construction times and costs. Suppose long-term waste disposal became routine. Suppose an electricity system dominated by intermittent renewables encountered unexpectedly high costs in providing reliable supply during prolonged periods of low wind and solar generation. A genuinely economic position would reconsider nuclear power in light of that evidence.
An ideological position might not.
There is also an important question of technological neutrality. Governments are rarely good at predicting which technologies will prove most successful decades into the future. Electricity systems involve complicated trade-offs between cost, reliability, emissions, land use, transmission, storage and security of supply. It is therefore questionable whether Parliament should permanently exclude one major low-carbon technology rather than allowing it to compete under appropriate regulation.
Removing the prohibition would not amount to subsidising nuclear power, nor would it require a single reactor to be built. It would simply mean that nuclear energy was judged according to the same broad principles applied to other technologies.
Supporters of renewable energy should have little to fear from such an approach if their economic arguments are correct. If wind, solar, batteries and other technologies provide electricity more cheaply and reliably, they will prevail.
Indeed, prohibiting nuclear power can inadvertently weaken the economic argument against it. A prohibition suggests that opponents are unwilling to allow the proposition to be tested.
Australia therefore needs a clearer nuclear debate. Those who oppose nuclear power because it is presently uneconomic should say so — and accept that their judgement might change if the evidence changes. Those who oppose nuclear power regardless of economics should acknowledge that theirs is fundamentally a value judgement.
Confusing the two produces poor public debate.
The sensible approach is neither to assume that Australia must build nuclear power nor to decree that it must never do so. It is to establish appropriate safeguards, remove unnecessary ideological barriers and allow competing technologies to be assessed on their merits.
If nuclear power cannot compete, economics will kill it. There is no need for ideology to do the job first.
Nuclear power confusion
Posted by: Art Hunter
