Many countries with existing nuclear power programmes either have plans to, or are building, new power reactors. Nuclear plant constructionĪbout 100 power reactors with a total gross capacity of about 100,000 MWe are on order or planned, and over 300 more are proposed. Most reactors currently planned are in Asia, with fast-growing economies and rapidly-rising electricity demand. ![]() In 2022, the IEA introduced the 'Net Zero Emissions by 2050 Scenario' (NZE), which "maps out a way to achieve a 1.5☌ stablisation in the rise in global average temperatures, alongside universal access to modern energy by 2030." The NZE in WEO 2022 sees nuclear capacity increase to 871 GWe by 2050. The IEA has produced energy transition scenarios since 2009, beginning with the '450 Scenario', which was consistent with the narrow aim of keeping carbon dioxide concentrations below 450 ppm (parts per million) – the level associated with a 50% likelihood of keeping the average global temperature rise below 2☌ (compared with pre-industrial levels). The IEA estimates in WEO 2022 that the cumulative impact of the stated policies would result in global carbon dioxide emissions declining by about 13% to 2050. The IEA's Stated Policies Scenario (formerly named 'New Policies Scenario') is based on a review of policy announcements and plans, reflecting the way governments see their energy sectors evolving over the coming decades. In this scenario, nuclear's contribution to global power generation is about 8.5% in 2050. The scenario envisages a total generating capacity of 19,792 GWe by 2050, with the increase concentrated heavily in Asia, and in particular India and China. In the 2022 edition (WEO 2022), the IEA's 'Stated Policies Scenario' sees installed nuclear capacity growth of over 43% from 2020 to 2050 (reaching about 590 GWe). In 2021 these provided 2653 TWh, about 10% of the world's electricity.Ībout 60 power reactors are currently being constructed in 15 countries, notably China, India and Russia. Units where construction is currently suspended, i.e. Ohma 1 and Shimane 3 (Japan), and Khmelnitski 3&4 (Ukraine), are not shown in the Table below.Įach year, the OECD's International Energy Agency (IEA) sets out the present situation as well as reference and other – particularly carbon reduction – scenarios in its World Energy Outlook (WEO) report. Today there are about 440 nuclear power reactors operating in 32 countries plus Taiwan, with a combined capacity of about 390 GWe. Plant lifetime extension programmes are maintaining capacity, particularly in the USA. ![]()
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