Problems
Japan Times reports U. S. robots found dangerous spikes in three reactor buildings, which will hamper efforts to bring Fukushima under control.
Workers are trying to repair the cooling systems. TEPCO is reducing hours for its contract workers, "the maximum allowable annual radiation dose for nuclear workers is 250 millisieverts, which is two and a half times the pre-crisis limit. This means each worker can only spend a maximum of five hours inside the building. Many have already passed the standard annual limit of 100 millisieverts and many subcontractors are reportedly refusing to adhere the to the higher radiation limit set for the crisis".

TEPCO plans to install a new air-cooling system to cool the coolant water to be stored inside the reactors' containment vessels. These are similar to air conditioners used in French nuclear power plants that remove heat from the coolant water that will circulate inside the containment vessel and keep the core cool.
Stabilization is still estimated to take up to nine months.

"Meanwhile a more urgent task...at No. 2 reactor, where radioactive water is flooding its turbine building and an adjacent underground trench." TEPCO is building storage facility and water-proofing it. Adhesive concrete may be used at No. 2 to stop leakage.
Polluted water in buildings and nearby areas totals "67,500 tons."