The blast at the reactor No 2 was followed by two previous hydrogen explosions at the reactors No 1 and 3 on 12 and 14 March, respectively.
The No 2 reactor’s steel containment structure was damaged by this blast and emergency workers were withdrawn from the plant to avoid excessive exposure to radioactive leaks.
This nuclear crisis has raised fears of a possible meltdown at the reactors of the power station.
As per media reports, Japan is battling to prevent meltdowns in three of the plant’s four nuclear reactors.
An earthquake measuring 8.9 points hit the northeast coast of Japan’s main Honshu island on 11 March, which triggered a ten-metre tsunami sweeping across the coast near Sendai.