This set of Hazardous Waste Management Multiple Choice Questions & Answers (MCQs) focuses on “Landmark Episode – Chernobyl Disaster”.
1. When did Chernobyl nuclear disaster take place?
Explanation: Chernobyl nuclear explosion took place on 26 April 1986 at the Chernobyl nuclear power plant, which is located 100 km from Kiev in Ukraine.
2. The explosion of reactor ruptured __________ pressure tubes.
Explanation: The steam explosion lifted the 1,000-metric-ton cover off the top of the reactor, rupturing the rest of the 1,660 pressure tubes, causing a second explosion and exposing the reactor core to the environment.
3. How long did the fire burn in the core due to explosion?
Explanation: The explosion in reactor 4 left the reactor core open to environment and the fire burned for 10 days, releasing a large amount of radiation into the atmosphere.
4. When was Chernobyl 1 reactor shut down?
Explanation: Due to building fire in Chernobyl plant, the reactor 2 was shut down in 1991, and reactor 1 and 3 was closed in 1996 and 2000 respectively.
5. What was the percent of uranium dioxide escaped to environment?
Explanation: Chernobyl 4 reactor contained about 190 metric tons of uranium dioxide fuel and it is estimated 13 percent to 30 percent of this escaped into the atmosphere.
6. What was the main reason for Chernobyl accident?
c) Flawed reactor design
d) Vent failure
Explanation: The Chernobyl accident in 1986 was the result of a flawed reactor design that was operated with inefficiently trained personnel.
7. Which of the following element was dropped to the core to extinguish fire?
Explanation: 5000 tonnes of boron, dolomite, sand, clay and lead were dropped on to the burning core by helicopter in an effort to extinguish the fire and limit the release of radioactive particles into the environment.
8. Which of the following radionuclide dose caused radiation health hazard in public population?
Explanation: Two radionuclides, the short-lived iodine-131 and the long-lived caesium-137, caused radiation health hazard in public population.
9. What was the major health hazard from Chernobyl disaster?
c) Thyroid cancer
Explanation: Subsequent studies in Ukraine, Russia and Belarus suggested the rapid increase in thyroid cancers due to the disaster.
10. When was the Chernobyl Forum established?
Explanation: In February 2003, the IAEA established the Chernobyl Forum, in cooperation with seven other UN organisations to enumerate the hazards associated.
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