After the accident on April 26, 1986, Block 4 was the reactor that suffered the catastrophic failure and was never restarted. The other units—Blocks 1, 2, and 3—continued to operate after the disaster. In fact, Block 3 was the last reactor to shut down, ceasing operations in 2000.

After the accident on April 26, 1986, Block 4 was the reactor that suffered the catastrophic failure and was never restarted. The other units—Blocks 1, 2, and 3—continued to operate after the disaster. In fact, Block 3 was the last reactor to shut down, ceasing operations in 2000.