On 17 April, Tokyo Electric Power Company issued a plan to control the damaged Fukushima Daiichi plant. That plan involved 51 steps, so far as of 10 May, only one is being done; the continued pumping of water to try and cool the reactors and fuel pools.
TEPCo admitted they did not expect such high levels of radiation inside the reactor buildings, and that has been the big hold up. They can’t do much with such high levels of radiation.
Workers have finally entered the building of Reactor 1, but that is only to help with the water injection and cooling operation. In other words, still stuck on step one of their 51 step plan.