Nuclear power is not usually sited in cities, I'm not aware of any plants that are. They are always sited in non-urban areas.
nuclear power plant are found in plain areas around the world like in the USA creating nuclear energy
A nuclear explosion is not possible in the design of a modern nuclear power plant but the problem is radioactive material being released into the atmosphere and nearby environment. If radiation is released into the atmosphere then it can travel many miles from the site of the nuclear plant or into the water system. The cleanup of a nuclear meltdown and radiation leak includes costly monitoring and decontamination of the radiation-affected areas.
The disadvantages of a tsunami are mainly:sweeping and destruction of homes and buildingskilling people in the direction of and in areas close to tsunamidrowning of fishermen during the tsunamibreaking down of the electric grid and spread of darknesssweeping of cars and vehicles in the areas affected by tsunamispoiling and destruction of crops, plants, trees, and domestic animals
See the link below taken from the NRC website
In case of a tsunami, it is important to move to higher ground or a designated tsunami evacuation zone as quickly as possible. Avoid coastal areas, rivers, and low-lying areas prone to flooding. Follow local authorities' instructions and stay informed through emergency alerts and warning systems.
Nuclear power plants are located in coastal areas for access to large bodies of water for cooling purposes. Water is used to cool the reactor during the energy generation process, and coastal locations provide a ready supply of water for this purpose. Additionally, coastal areas often provide easier transportation access for fuel delivery and waste disposal.
The presence of nuclear power plants may affect public health in many ways. Primarily, the release of radiation by nuclear power plants into the surrounding areas is known to have hazardous effects on public health. Nuclear power plants can also affect the health of the local environment and natural wildlife. Additionally Read more: Health Effects of Nuclear Power Plants | eHow.com http://www.ehow.com/list_5965272_health-effects-nuclear-power-plants.html#ixzz1sLR0KxwG
The Japan earthquake and tsunami on March 11, 2011, led to the evacuation of approximately 470,000 people from their homes due to the overwhelming destruction and the subsequent risk of nuclear disaster at the Fukushima Daiichi Nuclear Power Plant. The scale of the disaster prompted widespread evacuations in coastal areas and regions affected by the tsunami and radiation fears. The aftermath saw ongoing efforts to assist those displaced by the disaster.
During a tsunami, the best place to go in your house is an upper floor or to higher ground. If possible, evacuate to a designated tsunami evacuation area or follow local emergency procedures. Avoid areas near the coast or low-lying areas that are at risk of flooding.
The tsunami will flood the low lying areas. Going to higher ground might take you out of the areas that will be flooded.
This tsunami traveled over half the globe across the Pacific Ocean. The first waves hit Hawaii about 9 a.m. EST (1400 GMT) Friday and traveled across the Pacific from Alaska to Chile. To see the global extent of the Japan Tsunami you should see this animation showing how the tsunami traveled. This video clip was created by the National Oceanic and Atmospheric Administration (NOAA).