5 Countries That Have Nuclear Weapons Or Nuclear Power Technology

In this article, we discuss the 5 countries that have nuclear weapons or nuclear weapon technology. To read the detailed history and progression of nuclear weapons and technology, you can go directly to 15 Countries That Have Nuclear Weapons Or Nuclear Power Technology.

5. United Kingdom

Number of Nuclear Warheads in 2022: 225

The United Kingdom was one of the first countries to recognize the power of nuclear weapons and made major contributions to the US Manhattan Project. However, in 1946, The McMahon Bill, restricted all other countries including the UK from accessing nuclear knowledge, the country started its own project named HER or High Explosive Research. The United Kingdom launched its first successful nuclear test on October 3, 1952, on the Monte Bello Islands in Western Australia. The device was called  “Hurricane” and it had a yield of 25 kilotonnes. The country is estimated to have 225 nuclear warheads.

The United Kingdom operates around 9 nuclear reactors that produce around 5.9 GigaWatt of electricity. In 2005, the country listed 20 reactors to be decommissioned.