Fix grammar: When the radioactive gas and coolant were leaked, the valve should be closed immediately in order to prevent radioactive materials draining away.
The reactor was not designed to be closed, so the reactor was not closed.
The reactor was closed by the reactor was not closed.
The reactor was closed by the reactor was not closed.
The reactor was closed by the reactor was not closed.
The reactor was closed by the reactor was not closed.
The reactor was closed by the reactor was not closed.
The reactor was closed by the reactor was not closed.
The reactor was closed by the reactor was not closed.
The gas and coolant were released in a closed container.
The gas and coolant were released in a closed container.
The gas and coolant were released in a closed container.
The gas and coolant were released in a closed container.
The gas and coolant were released in a closed container.
The gas and coolant were released in a closed container.
The gas and coolant were released in a closed container.
The gas and coolant were released in a closed container.
The gas and coolant