Nuclear power is the fourth largest source of electricity in India. As of 2012, India has 20 nuclear reactors operational producing 29,664 GWh annually. Advantages of nuclear power include using less fuel than fossil plants and being environmentally friendly. However, safety is a primary concern due to radiation risk. India imports most of its uranium and has agreements with Russia and other countries to fuel its nuclear industry. The government has plans to significantly expand nuclear power capacity in coming years.