AS THE world contends with a global energy crisis , nuclear power has the potential to play a significant role in helping countries securely transition to energy systems dominated by renewables , according to a new special report by the IEA .
Countries that choose to continue or increase their use of nuclear power can reduce reliance on imported fossil fuels , cut carbon dioxide emissions and enable electricity systems to integrate higher shares of solar and wind power .
Building sustainable and clean energy systems will be more complex , riskier and more expensive without nuclear , according to the new report , Nuclear power and secure energy transitions : From today ’ s challenges to tomorrow ’ s clean energy systems .
Nuclear is today the second-largest source of low emissions power after hydropower , with nuclear plants in 32 countries . About 63 per cent of today ’ s nuclear generating capacity comes from more than 30 years old plants since many were built in the aftermath of the 1970s oil shocks .
But a range of both advanced and emerging economies have recently announced energy strategies that include substantial roles for nuclear power as well as considerable financial incentives to invest in it .
“ In today ’ s context of the global energy crisis , skyrocketing fossil fuel prices , energy security challenges and ambitious climate commitments , I believe nuclear power has a unique opportunity to stage a comeback ,” said IEA Executive Director
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Fatih Birol .
“ However , a new era for nuclear power is by no means guaranteed . It will depend on governments putting in place robust policies to ensure safe and sustainable operation of nuclear plants for years to come – and to mobilise the necessary investments including in new technologies .
“ And the nuclear industry must quickly address the issues of cost overruns and project delays that have bedevilled the construction of new plants in advanced economies . As a result , advanced economies have lost market leadership , as 27 out of 31 reactors started construction in 2017 are Russian or Chinese designs .”
In the IEA ’ s global pathway to reach Net Zero Emissions by 2050 , nuclear power doubles between 2020 and 2050 , with construction of new plants needed in all countries that are open to the technology . Even so , by mid-century , nuclear only accounts for eight per cent of the global power mix , dominated by renewables .
Despite moving to extend some existing plants ’ lifetimes , the nuclear fleet operating in advanced economies could shrink by one-third by 2030 without further efforts . While plant lifetime extensions require substantial investment , they generally yield a cost of electricity that is competitive with wind and solar in most regions .
Robust policies are needed to support the use of nuclear power and enhance its safety . Still , according to the report , the industry also must do a better job at delivering projects below cost and within budget to guarantee
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that nuclear-generated electricity is competitive .
Government financing will remain necessary to mobilise new investment , not just for plants but also to develop the latest technologies . This is because there is rarely sufficient private sector finance for such capital-intensive and long-lived assets , particularly those exposed to significant policy risk .
A total of 19 countries currently have nuclear reactors under construction , demonstrating the recent momentum behind nuclear power that is likely to be further stimulated by recent spikes in oil , gas and electricity prices .
At the same time , nuclear power faces public and political opposition in some countries , and the IEA makes no recommendations to countries that choose not to use it in their energy mix .
In the IEA ’ s Net Zero by 2050 pathway , half of the emissions reductions
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by mid-century come from technologies that are not yet commercially viable . This includes small modular reactors ( SMRs ), which are generally defined as advanced nuclear reactors with a capacity of fewer than 300 megawatts – or about one-third of a traditional plant .
The lower cost , smaller size and reduced project risks of SMRs may improve social acceptance and attract private investment . There is increased support and interest in Canada , France , the United Kingdom and the United States for this promising technology .
SMRs could also reuse the sites of retired fossil fuel power plants , taking advantage of existing transmission , cooling water and skilled workforces . But the successful long-term deployment of SMRs hinges on strong support from policymakers starting now , not just to mobilise investment but also to streamline and harmonise regulatory frameworks . — @ Green
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