Q4+Chernobyl

** Question4 ** ** How did it happen? ** The disaster started during a test on Saturday 26th April. At reactor number 4 of the Chernobylplant. There was a sudden power output surge which leads to emergency shutdown.The reactor became unstable as the flow of cooling water slowed and automaticshut off has been damaged so the plant can’t turn itself off. **Who or what caused the disaster? ** On April 26th 1986 operators at Chernobyl plant begin doing unauthorized experiments. At 1:25am reactor number 4 at Chernobyl plant closed to Pripiat in Ukraine overheatedand it's water coolant flashed into steam in all sudden. Hydrogen formed fromthe steam reacted with the graphile moderator, which brought two big explosionsand a fire. The explosion of the reactor released radiation 20 miles andaffected the world too. Graphile from the core caught fire and burned for 9 days releasing radioactivity into the atmosphere. **Why did it happen? ** The Chernobyl disaster was a nuclear accident that happened on 26<span style="background-color: transparent; color: #000000; font-size: 11px; text-align: left; text-decoration: none; vertical-align: baseline;">th of April 1986 at the Chernobyl nuclear power plant in Ukraine. It was kept as the worst nuclear power plant disaster in history and the only level 7 on theInternational Event Scale. Most of the deaths were caused by radiation poisoning in the accident.



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