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Description: A 1971 incident at the Swiss power plant where an assembled core for a reactor was damaged due to dropping of a fuel element from a crane. Consequences: No radiation release but the event delayed the initial operation of the power plant. Lessons Learned: Highlighted the significance of precise and cautious handling of nuclear fuel and components.

Description: A sodium leak and fire at a Japanese breeder reactor in December 1995, which caused a major setback for Japan's nuclear program. Consequences: Closure of the plant, loss of public trust in nuclear power, and the delay in the development of breeder technology in Japan. Lessons Learned: Highlighted the challenges with breeder reactor technology and the need for transparency in nuclear operations.

Description: A fire in a nuclear reactor at the Windscale facility in the UK on October 10, 1957, which led to a release of radioactive iodine and polonium. Consequences: Increase in cancer incidents among nearby residents. Lessons Learned: Underlined the necessity for improved reactor design, including temperature monitoring and cooling systems.

Description: A British nuclear reprocessing site where various incidents have occurred, including a fire in 1957 at a plutonium production pile and the release of a significant amount of radioactive waste into the Irish Sea over the years. Consequences: Long-term environmental contamination. Lessons Learned: Necessitated the development of more robust waste management and containment strategies.

Description: A catastrophic nuclear accident that occurred on April 26, 1986, at the Chernobyl Nuclear Power Plant. A reactor explosion and fire released large quantities of radioactive particles into the atmosphere. Consequences: Large areas contaminated, thousands affected by radiation, long-term health and environmental impacts. Lessons Learned: Showed the importance of safety culture and reactor design flaws, led to international nuclear safety initiatives.

Description: A radioactive contamination accident that occurred on September 29, 1957, at the Mayak Production Association, Soviet Union. It was caused by a storage tank for liquid nuclear waste explosion. Consequences: Widespread environmental contamination and a hastily executed evacuation. Lessons Learned: The incident emphasized the criticality of proper nuclear waste storage and management.

Description: An incident on January 3, 1961, in Idaho, USA, at a US Army experimental nuclear power reactor, which underwent a criticality excursion, leading to an explosion. Consequences: Three fatalities, reactor destroyed. Lessons Learned: Led to design changes to prevent accidental removal of control rods and to safer reactor designs.

Description: An incident in which scavengers in Goiania, Brazil, found and dismantled a radiation therapy source without knowing what it was, leading to widespread contamination in September 1987. Consequences: Four deaths and hundreds exposed to radiation. Lessons Learned: The critical importance of secure disposal of radioactive materials was highlighted.

Description: A nuclear disaster triggered by a tsunami following the Tōhoku earthquake on March 11, 2011. The plant experienced multiple meltdowns and hydrogen explosions. Consequences: Release of radioactive materials, evacuation orders for nearby residents, long-term environmental damage. Lessons Learned: Highlighted the need for better tsunami preparedness and backup power systems at nuclear plants.

Description: A series of accidents at the Saint-Laurent Nuclear Power Plant in France, including a partial core meltdown in 1969 and another in 1980 due to cooling system failures. Consequences: Radioactive releases into the environment, increased regulation and oversight of the nuclear industry in France. Lessons Learned: The accidents underlined the necessity for redundant safety systems and better reactor monitoring.

Description: An accident on February 22, 1977, in Czechoslovakia at a nuclear power plant caused by faulty equipment during fuel loading that led to the release of radioactive gases. Consequences: No immediate fatalities but the reactor was damaged and the event caused public concern. Lessons Learned: Emphasized the need for proper operator training and equipment maintenance.

Description: A criticality accident on September 30, 1999, in a Japanese nuclear fuel processing facility caused by improper handling of enriched uranium. Consequences: Two deaths, radiation injuries to workers, and evacuation of local residents. Lessons Learned: Reinforced the importance of proper handling and safety procedures for nuclear materials.

Description: An incident in 2002 at an Ohio, USA nuclear power plant where severe corrosion was found on the reactor vessel head. Consequences: The plant shut down for repairs and upgrades, no radiation release but a high potential for an accident. Lessons Learned: Underscored the need for rigorous inspection routines and maintenance to prevent corrosion and ensure containment integrity.

Description: A partial nuclear meltdown that occurred on March 28, 1979, at the Three Mile Island Nuclear Generating Station in Pennsylvania, USA. Consequences: Minimal radiation release but significant public fear and distrust. Lessons Learned: Improved operator training, better communication during emergencies, and enhancements to reactor design to prevent future meltdowns.