#CHERNO_ALPHA Emergency situation at Unit 2 of the Chernobyl Nuclear Power Plant, October 11, 1991 Unit 2 was in the process of raising power after scheduled maintenance. The thermal capacity was 1570 MW. Generator G-3 was connected to the grid, and TG-4 was disconnected for maintenance. The disconnection was accomplished using two air circuit breakers at the ORU-330. At 20:10, when the TG-4 speed dropped to 50-200 rpm, the air circuit breaker was turned on, as a result of which the TG-4 was con