The level of water coolant in reactor number 2 at a Japanese nuclear power plant damaged by a massive earthquake and tsunami has fallen because of the failure of the reactor's cooling system, the Jiji Press agency said Monday.
The report, which cited information provided by the reactor's operator, Tokyo Electric Power Co, to the government of Fukushima prefecture, was published hours after a hydrogen explosion at reactor number 3 at the same power plant, DPA reported.
The plant in Fukushima city, the capital of the prefecture, is home to six reactors.
Technicians have been working frantically since Friday's magnitude-9 quake and tsunami disabled the cooling systems at six nuclear reactors there.
An explosion occurred at reactor number 1 Saturday. Monday's blast came minutes after a magnitude-6.2 aftershock.