| 2nd | Top military nuclear accidents |
| Question 1: It measured as a Level 6 disaster on the International Nuclear Event Scale, making it the second most serious nuclear accident ever recorded (after the ________). | |||
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| Question 2: The Kyshtym disaster was a radiation contamination disaster that occurred on 29 September 1957 in ________, a nuclear fuel reprocessing plant in Russia (then a part of the Soviet Union). | |||
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| Question 3: The event occurred in the town of Ozyorsk, a ________ in the USSR built around Mayak. | |||
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| Question 4: Initially Mayak was dumping high-level radioactive waste into a nearby river, which was taking waste to the river Ob, flowing farther down to the ________. | |||
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