Nuclear power is the third largest source of electricity worldwide, accounting for 17% of the worlds electricity (2). As of 1993 there were 430 nuclear power plants operating worldwide. The use of nuclear power is limited to only about 30 countries, where a large portion of the total electricity is obtained through nuclear power (1).
Nuclear power is favorable over other sources because it can generate large amounts of electricity from relatively small inputs. It is a nearly inexhaustible resource, requiring only a relatively small amount of enriched Uranium to power the reaction. Because there is no combustion of fuel, no harmful gases are released, making nuclear power a much cleaner alternative to fossil fuels. Nuclear power also has an edge over other alternative power sources in that it has a strong infrastructure in many nations and is a proven energy resource. It is reasonably reliable and fairly cost-effective.
However, the nuclear reactors are not without cost. The initial construction of a nuclear reactor requires a large investment of capital. If the reactor is not constructed and maintained properly it is a safety hazard to people and the environment over a large area. There is also the issue of the reactor waste products which are highly reactive and must be specially stored to prevent contamination. Nuclear power plants can only be set up at suitably sparcely populated locales where it is believed that the plant will not pose a major threat to the inhabitants if an accident occurs. Along with construction and maintenance costs is the cost of insurance and inspections.