Chernobyl Nuclear Power Plant - Quiz
Chernobyl Nuclear Power Plant
  • 1. What caused the partial meltdown in reactor No. 1 in 1982?
A) A steam explosion
B) A faulty cooling valve
C) A turbine fire
D) A surge in electricity
  • 2. How long did it take to repair reactor No. 1 after the 1982 incident?
A) Two years
B) One year
C) Six months
D) Eight months
  • 3. What was the capacity of reactor No. 1 after it was repaired following the 1982 accident?
A) 1000MWe
B) 800MWe
C) 900MWe
D) 750MWe
  • 4. Which reactor was similar to the 1982 Chernobyl reactor No. 1 accident?
A) 1991 reactor No. 2
B) 1975 Leningrad unit 1
C) 1986 reactor No. 4
D) 1984 reactor No. 3
  • 5. In 1984, how high did temperatures reach in the room housing the steam separators?
A) 270 degrees Celsius
B) 200 degrees Celsius
C) 150 degrees Celsius
D) 300 degrees Celsius
  • 6. What was the primary structural concern regarding the powerplant in 1984?
A) Weakness in the containment dome
B) Concrete shifting due to heat
C) Corrosion of the cooling pipes
D) Radiation leakage in the foundation
  • 7. When did the catastrophic meltdown of reactor No. 4 occur?
A) 26 April 1986
B) 26 April 2021
C) 11 October 1991
D) 9 September 1982
  • 8. What was the main purpose of the 1986 safety test that led to the reactor No. 4 disaster?
A) A cooling valve repair
B) A turbine replacement
C) An electrical upgrade
D) A safety test
  • 9. How far did the radioactive cloud from the 1986 disaster spread?
A) As far as Norway
B) Across the entire USSR
C) Only within a 50km radius
D) Only to nearby Pripyat
  • 10. What was installed in 2016 to prevent further escape of radioactivity from the destroyed reactor?
A) An underground lead wall
B) A large steel confinement shelter
C) A glass containment dome
D) A concrete lead sarcophagus
  • 11. What caused the fire in reactor No. 2 in 1991?
A) A cooling pump failure
B) A fuel leak
C) A faulty switch
D) A human error during maintenance
  • 12. Which gas leaked into the turbine hall during the 1991 incident, fueling the fire?
A) Helium
B) Oxygen
C) Hydrogen
D) Nitrogen
  • 13. When was reactor No. 2 permanently shut down?
A) Shortly after October 1991
B) In 2016
C) Immediately after the 1986 disaster
D) In 1984
  • 14. According to KGB documents, when did the Moscow government know the powerplant was dangerous?
A) As early as 1983
B) In 1986
C) In 1991
D) In 1982
  • 15. What specifically collapsed as a result of the 1991 fire in the turbine hall?
A) The main reactor wall
B) A truss supporting the roof
C) The ventilation stack
D) The steam separator
  • 16. Which two electrical grid voltages was the Chernobyl power plant connected to?
A) 110 kV and 400 kV
B) 400 kV and 800 kV
C) 330 kV and 750 kV
D) 220 kV and 500 kV
  • 17. How many electrical generators were connected to the 750 kV grid by a single generator transformer per block?
A) Two
B) Four
C) One
D) Three
  • 18. What is the primary purpose of the 330 kV line at the Chernobyl power plant?
A) Steam generation
B) External power supply
C) Main power export
D) Coolant pump control
  • 19. What system provides power to essential systems in the case of a total external power loss?
A) Battery banks
B) Wind turbines
C) Diesel generators
D) Hydrogen fuel cells
  • 20. How many seconds should it take for diesel generators to start automatically upon loss of off-site power?
A) 5 seconds
B) 15 seconds
C) 60 seconds
D) 30 seconds
  • 21. How long is the machine hall at the Chernobyl power plant?
A) 1,200 metres
B) 900 metres
C) 600 metres
D) 300 metres
  • 22. What is the rotation speed of the turbine and generator rotors?
A) 3,600 revolutions per minute
B) 1,500 revolutions per minute
C) 3,000 revolutions per minute
D) 2,400 revolutions per minute
  • 23. How is the hydrogen for the generators produced on-site?
A) Chemical combustion
B) Electrolysis
C) Steam reforming
D) Air separation
  • 24. Which plant supplied the K-500-65/3000 steam turbines?
A) Donetsk steam plant
B) Moscow heavy machinery plant
C) Kharkiv turbine plant
D) Kyiv electrical works
  • 25. What type of power does the generator produce?
A) 400 kV 50 Hz AC
B) 20 kV 50 Hz DC
C) 10 kV 60 Hz DC
D) 20 kV 50 Hz AC
  • 26. Which reactor block was equipped with the newer version of the turbines?
A) Block 1
B) Block 4
C) Block 2
D) Block 3
  • 27. What was a common problem associated with the newer K-500-65/3000-2 turbines?
A) Low electrical output
B) Overheating of the stator
C) Excessive hydrogen leakage
D) Vibrations in the bearings
  • 28. How much coolant flow does each turbine receive?
A) 82,880 t/h
B) 100,000 t/h
C) 120,500 t/h
D) 50,000 t/h
  • 29. In what year was the first reactor of the Chernobyl Nuclear Power Plant commissioned?
A) 1983
B) 1977
C) 1978
D) 1981
  • 30. What type of nuclear reactor was utilized at the Chernobyl plant?
A) BWR
B) RBMK
C) CANDU
D) PWR
  • 31. Which of the following was the first nuclear power plant built on Ukrainian soil?
A) Chernobyl
B) Kursk
C) Leningrad
D) Smolensk
  • 32. What was the completion status of Reactor No. 5 at the time of the explosion?
A) 50%
B) 30%
C) 90%
D) 70%
  • 33. How many total reactors were planned for the Chernobyl site at one point?
A) Twelve
B) Ten
C) Eight
D) Six
  • 34. What feature did second-generation RBMK designs possess that first-generation units did not?
A) A different fuel enrichment process
B) An automated emergency shutdown system
C) A more secure containment structure
D) A larger cooling pond
  • 35. In what year was reactor No. 2 commissioned?
A) 1978
B) 1981
C) 1977
D) 1983
  • 36. In what year were the plans for the Chernobyl Nuclear Power Plant first conceived?
A) 1975
B) 1966
C) 1971
D) 1972
  • 37. When did the construction of the Chernobyl Nuclear Power Plant begin?
A) 1971
B) 1966
C) 1974
D) 1972
  • 38. How many construction phases were planned for the plant?
A) 6
B) 10
C) 12
D) 4
  • 39. What type of reactors were the four reactors at the plant?
A) VVER-1000
B) BWR
C) PWR
D) RBMK-1000
  • 40. What percentage of Ukraine's electricity did the four reactors produce?
A) 5%
B) 25%
C) 10%
D) 20%
  • 41. What was the name of the city built to house the workers and their families?
A) Kursk
B) Chernobyl
C) Kiev
D) Pripyat
  • 42. What was the maximum weight the mobile crane used during construction could lift?
A) 300 tons
B) 1,000 tons
C) 500 tons
D) 640 tons
  • 43. Who managed the headquarters and directed the construction work?
A) The Komsomol brigade
B) Vasilii Trofimovich Kizima
C) Viacheslav Volkov
D) The tank forces
  • 44. Who completed the carcassing of the reactor shaft by 1974?
A) The hydraulic engineers
B) Vasilii Trofimovich Kizima
C) The Komsomol-and-youth brigade of Viacheslav Volkov
D) The tank force welders
  • 45. What was one of the major motivating factors for building the plant?
A) Preventing an electricity deficit
B) Testing new crane designs
C) Creating a tourist destination
D) Exporting electricity to Europe
  • 46. Which of the following was a documented issue during the construction of the plant?
A) Ahead of schedule
B) Excess of materials
C) Surplus of safety measures
D) Shortage of workers
  • 47. Where is the Chernobyl Nuclear Power Plant located?
A) Western Poland
B) Eastern Belarus
C) Northern Ukraine
D) Southern Russia
  • 48. How far is the power plant from the city of Chernobyl?
A) 16 kilometres
B) 5 kilometres
C) 16.5 kilometres
D) 100 kilometres
  • 49. What was the plant originally named after?
A) Nikita Khrushchev
B) Joseph Stalin
C) V. I. Lenin
D) Mikhail Gorbachev
  • 50. When is the decommissioning process expected to be completed?
A) 2080
B) 2045
C) 2030
D) 2065
  • 51. What is considered the primary priority of the RBMK reactor design?
A) Cost efficiency
B) Environmental sustainability
C) Safety
D) Energy output volume
  • 52. How far is the plant from the city of Kyiv?
A) 50 kilometres
B) 16 kilometres
C) About 100 kilometres
D) 250 kilometres
  • 53. How much electricity did Unit 1 supply in total?
A) 120 terawatt-hours
B) 50 terawatt-hours
C) 75 terawatt-hours
D) 98 terawatt-hours
  • 54. What entity did Ukraine make an agreement with in 1995 regarding the closure of reactors?
A) European Union
B) United Nations
C) International Atomic Energy Agency
D) Soviet Union
  • 55. In what year was reactor No. 1 shut down?
A) 1989
B) 2000
C) 1991
D) 1996
  • 56. In what year was reactor No. 3 shut down?
A) 1996
B) 2000
C) 1995
D) 1991
  • 57. What was the name of the process computer used at Chernobyl prior to 1995?
A) SKALA
B) LENINGRAD
C) PRIZMA
D) RBMK
  • 58. What type of data storage did the SKALA system use?
A) Solid state drives
B) Hard disk drives
C) Cloud storage
D) Magnetic tape
  • 59. How many analog signals was the SKALA system wired to accept?
A) 5000
B) 6500
C) 7200
D) 10000
  • 60. How many digital signals was the SKALA system wired to accept?
A) 6500
B) 8000
C) 7200
D) 5000
  • 61. Could the PRIZMA program directly control the reactor?
A) Only after 1995
B) No
C) Only during emergencies
D) Yes
  • 62. What media was used for loading software into the SKALA system?
A) Magnetic cards
B) Punched tape
C) Floppy disks
D) CD-ROM
  • 63. What does the name SKALA literally translate to in English?
A) Rock
B) Prism
C) Reactor
D) Control
  • 64. What system was affected by the 2017 Petya cyberattack at the Chernobyl plant?
A) Electrical grid control
B) Radiation monitoring system
C) Emergency shutdown system
D) Cooling pump system
  • 65. When did Russian forces capture the Chernobyl plant?
A) 9 March 2022
B) 24 February 2022
C) 31 March 2022
D) 2 April 2022
  • 66. On what date did the power plant experience a power cut?
A) 31 March 2022
B) 24 February 2022
C) 14 February 2025
D) 9 March 2022
  • 67. Why did Ukrainian authorities fear a radiation leak on 9 March 2022?
A) The sarcophagus was breached
B) Backup generators failed to start
C) Spent fuel coolant could not circulate
D) The main reactor wall cracked
  • 68. When did Russian forces formally hand control of the plant back to its employees?
A) 2 April 2022
B) 24 February 2022
C) 31 March 2022
D) 9 March 2022
  • 69. Where were the Ukrainian National Guard personnel taken as prisoners of war?
A) Russia
B) Germany
C) Belarus
D) Poland
  • 70. Which area was the site of trenches dug by Russian troops?
A) Exclusion zone entrance
B) Red Forest
C) New Safe Confinement
D) Unit No. 4 building
  • 71. Who admitted to helping start the rumors about radiation sickness?
A) The plant director
B) A tour guide
C) The Energy Minister
D) A Russian soldier
  • 72. According to President Zelenskyy, what caused damage to the New Safe Confinement on 14 February 2025?
A) A Russian drone attack
B) A fire in the cooling unit
C) A natural earthquake
D) A structural collapse
  • 73. What is the total estimated cost for the repairs of the containment dome?
A) €585 million
B) €200 million
C) €500 million
D) €100 million
  • 74. What is the primary isotope responsible for the majority of external gamma radiation at the Chernobyl site?
A) Plutonium-239
B) Uranium-235
C) Iodine-131
D) Caesium-137
  • 75. What is the half-life of the isotope caesium-137 according to the text?
A) 10.5 years
B) 40.2 years
C) 25.5 years
D) 30.17 years
  • 76. Which consortium was responsible for designing and building the New Safe Confinement?
A) Holtec International
B) Novarka
C) The European Bank for Reconstruction and Development
D) The Verkhovna Rada
  • 77. When was the completed arch of the New Safe Confinement placed over the existing sarcophagus?
A) August 2015
B) September 2010
C) November 2016
D) June 2003
  • 78. How many spent fuel assemblies are intended to be stored in the ISF-2?
A) 231
B) 21,297
C) 1,698
D) 10,000
  • 79. What happened to the 'V. I. Lenin' portion of the plant's name following Ukraine's independence?
A) It remained the same
B) It was replaced with 'Verkhovna Rada'
C) It was removed
D) It was changed to 'Chernobyl'
  • 80. In what year did the dismantling and removal of equipment begin at reactor No. 1?
A) 2015
B) 2000
C) 2007
D) 1996
  • 81. When was the first canister of nuclear waste loaded into the ISF-2 storage area?
A) January 2022
B) August 2015
C) September 2010
D) November 18, 2020
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