Since March 11, the six reactors at the Fukushima Daiichi nuclear power plant have been in various states of disrepair after being battered by a 9.0-magnitude earthquake and subsequent tsunami.
Here is the latest on the status of each reactor and what is being done to prevent further emissions of radioactive material.
Reactor No. 1
The temperature has been rising in the reactor's core, Hidehiko Nishiyama of Japan's Nuclear and Industrial Safety Agency said Monday.
To address this issue, the flow rate of freshwater into the reactor core will be further adjusted, the nuclear safety official said. That water is being directed in via a fire truck and temporary electricity-driven pump.
On Tuesday, the plan is to switch over to more a permanent power generator for the unit's cooling system, Nishiyama said. The No. 1 unit's power supply will be distinct than those for other reactors to "avoid risks" trickling down elsewhere if there is a breakdown, according to the official.
Cable was being laid Monday to supply power to permanent monitoring outposts around the No. 1 unit complex, Nishiyama said. Since the March 11 quake, radiation has been monitored from mobile systems. (read more)
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