The capacity of nuclear power worldwide of around 400,000 megawatts (MW), meeting 10% of global electricity generation, is forecast to exceed 500,000 MW by 2030, according to data compiled by Anadolu Agency on Wednesday.

Seen as the second-lowest carbon source in meeting the globe's increasing electricity demand, nuclear energy plays an important role in ensuring developed and developing countries' energy supply security.

While France provides approximately 70% of its electricity needs from nuclear energy, almost half of the electricity demand from Slovakia and Ukraine comes from nuclear power, followed by Hungary and Belgium at 49% and 47%, respectively.

Eurostat data shows the share of nuclear energy in electricity generation in European countries was 24.6% as of the end of 2019.

Nuclear power accounted for about 20% of the US's total electricity production, which has the largest nuclear fleet.

The World Nuclear Association says there are currently about 443 nuclear reactors operating globally in 33 countries.

The US ranks first with 94 operational nuclear reactors with an installed capacity of 96,553 MW. France follows with 56 reactors and a capacity of 61,370 MW.

Among other countries with the highest energy capacity, China shines with a capacity of 47,498 MW from 49 reactors, followed by Russia's 38 reactors with 28,578 MW.

Japan's 33 nuclear reactors hold a capacity of 31,679 MW, while South Korea, with its 24 reactors, has 23,150 MW.

According to the International Energy Agency's Electricity Market report, nuclear power saw significant growth in new capacity, as new units in China, India, Russia, Belarus, South Korea, Slovakia and the United Arab Emirates (UAE) are adding over 8,000 MW of new capacity, with most beginning in the latter half of 2020.

The capacity growth last year more than offset the nuclear power capacity with 5,000 MW expected to be closed in the same period.

2020 witnesses new nuclear expansionThe first nuclear plant in the Arabian Peninsula and the oil-rich country, the Barakah nuclear plant, holds a net capacity of 1,345 MW.

Countries like China and Russia also expanded their power capacities by putting new nuclear reactors into operation in 2020.

The construction of new nuclear power plants with a capacity of around 53,000 MW continues worldwide, while the total capacity of planned nuclear plants is set to reach around 69,000 MW.

China ranks first in capacity increase to build over 20,000 MW of nuclear capacity in the next five years, in line with the country's 14th Five Year Plan covering the period between 2021 and 2025.

The IEA forecasts that the share of nuclear power, seen as one of the key sources in the transition to a low carbon energy system, will reach 15% by 2030 from today's share of 10%.