A nuclear disaster refers to an accident that occurs in any nuclear facility of the nuclear fuel cycle including the nuclear reactor or in a facility that uses radioactive sources, which can result in a significant release of radiation into the environment. These incidents primarily occur in nuclear reactors of nuclear power plants. The Chernobyl disaster, the SL-1 accident, the Fukushima nuclear disaster and the Three Mile Island accident are examples of serious nuclear power plant accidents. Nuclear disasters can cause enormous damage over a large area leading to mass damage to human civilization. Nuclear explosions lead to the release of massive amounts of radiation and radioactive materials, which include radionuclides such as radioactive iodine and cesium. These radionuclides can contaminate agricultural commodities and goods, and may also negatively impact the animals and plants in the affected area. This book is compiled in such a manner, that it will provide in-depth knowledge