Switzerland is a signatory of the nuclear Non-Proliferation Treaty (NPT) and has signed and ratified the Comprehensive Test Ban Treaty (CTBT), being one of the 44 listed countries needed to sign and ratify for the CTBT to enter into force.

There are currently five nuclear power plants in operation in Switzerland, which are operated by four separate utilities.

In 1990 there was a referendum which rejected a phase-out of nuclear power, but placed a moratorium on the construction of new nuclear power plants for 10 years. In 1998 the Government announced that Muhleberg would be given an extension of its operating life, to allow it to function until 2012.

In 2003 a further referendum on nuclear power, which would have required the phase out of nuclear power by 2014, was rejected.

Read the profile on Switzerland from the Model Nuclear Inventory (pdf), produced by the Reaching Critical Will project of the Women's International League for Peace and Freedom.