Fix all grammatical errors: Thanks to the rapid pace of technology development nowadays, new materials for reactor construction, ways of observing and controlling process, we can be assured that past accident like Chernobyl will never happen again.
The reactor was built in 1957, but the reactor was not built in 1957.
Correct: The reactor was built in 1957, but the reactor was not built in 1957.
Correct: The reactor was built in 1957, but the reactor was not built in 1957.
Correct: The reactor was built in 1957, but the reactor was not built in
The accident at Chernobyl was caused by the Chernobyl accident, which was caused by a nuclear reactor explosion.
Correct: The accident at Chernobyl was caused by a nuclear reactor explosion.
Correct: The accident at Chernobyl was caused by a nuclear reactor explosion.
Correct: The accident at Chernobyl was caused by a nuclear reactor explosion.
Correct: The accident at Chernobyl was caused by a nuclear reactor explosion.
Correct: The accident at Chernobyl was caused by a nuclear reactor explosion.
Correct: The accident