Now, the three examples, Chernobyl, Fukushima, Three Mile Islands, show the effect of the nuclear accident. Each has different causes, but the damage was terrible. Chernobyl Disaster Brief Description On April 26, 1986, the nuclear power plant was exploded in Chernobyl, Ukraine. At 1:23, while everyone was sleeping, reactor no. 4 exploded and 40 hours later, all the city's residents were forcibly relocated to other cities and never returned home. The Chernobyl disaster is considered the worst nuclear accident. The Chernobyl nuclear power plant was operated by the Central Nuclear Energy Corporation of the Soviet Union. (International Atomic Energy Agency-IAEA, 2005)CausesThere are two possible causes. The first is operator error. The turbine exploded during the test and the operator ignored the rules and regulations. The operator turned off the technical protection systems and all safety barriers. This happened due to insufficient education and training and caused the lack of knowledge of the nuclear reactor. He simply ignored the test steps and took the dangerous shortcut to quickly end the test. The other possible cause is incorrect operating instructions and design. This topic was announced in 1992. Both possible causes have been lobbied by different groups. And the Soviet Union did not provide sufficient data; so the exact cause is still veiled. (IAEA, 2005) Damage The greatest damage is people's exposure to radiation. 530,000 local recovery workers were exposed to radiation, the effective dose being the same as fifty years of exposure to natural radiation (IAEA, 1996). 31 nuclear power personnel and emergency workers died as a direct result, and the Chernobyl Forum predicts that total number... half the document... was eliminated by the leak a year later. Another cause of the disaster is that the government ignored the possibility of tsunami. Scientists have warned about the dangers of the tsunami and advised them to build more protections against the tsunami threat. However, the government did not take the advice into consideration (IAEA, 2011) DamageRadiation released through the soil, air and sea. Around 20 kilometers of areas around the nuclear power plants have been contaminated and residents 20-30 kilometers from the nuclear power plant have been asked to leave the region. The polluted coolant ends up in the Pacific Ocean, which is very dangerous, because human beings are at the top of the food chain, so eating fish can cause cancer. The Pacific Ocean is the largest fishery in the world, and per capita fish consumption in Japan is the highest in the world (Mccurry, 2014). Effect of the disaster