Workers wearing protective suits and masks stand next to the spent fuel pool inside the Common Pool Building, where all the nuclear fuel rods will be stored for decommissioning, at Tokyo Electric Power Co. 's tsunami-crippled Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima prefecture Wednesday, March 6, 2013, ahead of the second anniversary of the March 11, 2011 tsunami and earthquake. Some 110,000 people living around the nuclear plant were evacuated after the massive March 11, 2011, earthquake and tsunami knocked out the plant's power and cooling systems, causing meltdowns in three reactors and spewing radiation into the surrounding air, soil and water. (Photo by Issei Kato/AP Photo/Pool)

In this Friday, February 22, 2013 photo, standing by a signboard reading: “Rikuzentakata City Hall” a worker holds flags to control traffic under cold weather in a street near a new road construction site in Rikuzentakata, Iwate Prefecture. Japan's progress in rebuilding from the tsunami that thundered over coastal sea walls, sweeping entire communities away, is mainly measured in barren foundations and empty spaces. Clearing of forests on higher ground due to be leveled to make space for relocating survivors has barely begun. Japan next week, will observe two years from the March 11, 2011 disasters which devastated in the northeastern Pacific coast of the country. (Photo by Junji Kurokawa/AP Photo)

Workers haul a bag of leaves and soil contaminated by radiation, during a clean up operation in the town of Naraha, which was previously inside the exclusion zone surrounding the Fukushima Dai-ichi nuclear plant, in Japan, Wednesday, March 6, 2013. On March 11, Japan marks two years since an earthquake and tsunami caused the plant to spew radiation into the air, contaminating a large area surrounding it. Decontamination operations continue in areas outside the zone, though few residents have returned to the town since it was re-opened. (Photo by Greg Baker/AP Photo)

In this Thursday, February 21, 2013 photo, portrait of the March 11, 2011 earthquake and tsunami survivors are put on the wall in Kesennuma, Muyagi Prefecture. Japan's progress in rebuilding from the tsunami that thundered over coastal sea walls, sweeping entire communities away, is mainly measured in barren foundations and empty spaces. Clearing of forests on higher ground due to be leveled to make space for relocating survivors has barely begun. Japan next week, will observe two years from the March 11, 2011 disasters which devastated in the northeastern Pacific coast of the country. (Photo by Junji Kurokawa/AP Photo)

In this Sunday, February 24, 2013 photo, a fishing boat washed ashore during the March 11, 2011 earthquake and tsunami sits in the devastated area in Kesennuma, Miyagi Prefecture. Japan's progress in rebuilding from the tsunami that thundered over coastal sea walls, sweeping entire communities away, is mainly measured in barren foundations and empty spaces. Clearing of forests on higher ground due to be leveled to make space for relocating survivors has barely begun. Japan will next week observes two years from the March 11, 2011 disasters which devastated in the northeastern Pacific coast of the country. (Photo by Junji Kurokawa/AP Photo)

In this Friday, February 22, 2013 photo, a temple gate stands in an area devastated by the March 11, 2011 earthquake and tsunami in Rikuzentakata, Iwate Prefecture. Japan's progress in rebuilding from the tsunami that thundered over coastal sea walls, sweeping entire communities away, is mainly measured in barren foundations and empty spaces. Clearing of forests on higher ground due to be leveled to make space for relocating survivors has barely begun. Japan will next week observes two years from the March 11, 2011 disasters which devastated in the northeastern Pacific coast of the country. (Photo by Junji Kurokawa/AP Photo)

In this Sunday, February 24, 2013 photo, a man inspects a fishing boat which was washed ashore during the March 11, 2011 earthquake and tsunami in Kesennuma, Miyagi Prefecture, Japan. Japan's progress in rebuilding from the tsunami that thundered over coastal sea walls, sweeping entire communities away, is mainly measured in barren foundations and empty spaces. Clearing of forests on higher ground due to be leveled to make space for relocating survivors has barely begun. Japan will next week observes two years from the March 11, 2011 disasters which devastated in the northeastern Pacific coast of the country. (Photo by Junji Kurokawa/AP Photo)

In this Saturday, February 23, 2013 photo, foundations of houses are seen in an area devastated by the March 11, 2011 earthquake and tsunami in Kesennuma, Miyagi Prefecture. Japan's progress in rebuilding from the tsunami that thundered over coastal sea walls, sweeping entire communities away, is mainly measured in barren foundations and empty spaces. Clearing of forests on higher ground due to be leveled to make space for relocating survivors has barely begun. Japan will next week observes two years from the March 11, 2011 disasters which devastated in the northeastern Pacific coast of the country. (Photo by Junji Kurokawa/AP Photo)

In this Thursday, February 21, 2013 photo, a woman offers a prayer in front of a make-shift alter for the victims of the March 11, 2011 earthquake and tsunami in Kesennuma, Miyagi Prefecture. Japan's progress in rebuilding from the tsunami that thundered over coastal sea walls, sweeping entire communities away, is mainly measured in barren foundations and empty spaces. Clearing of forests on higher ground due to be leveled to make space for relocating survivors has barely begun. Japan next week, will observe two years from the March 11, 2011 disasters which devastated in the northeastern Pacific coast of the country. (Photo by Junji Kurokawa/AP Photo)

Workers carry out radiation screening on a bus for a media tour at Tokyo Electric Power Co. (TEPCO)'s tsunami-crippled Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima prefecture Wednesday, March 6, 2013, ahead of the second anniversary of the March 11, 2011 tsunami and earthquake. Some 110,000 people living around the nuclear plant were evacuated after the massive March 11, 2011, earthquake and tsunami knocked out the plant's power and cooling systems, causing meltdowns in three reactors and spewing radiation into the surrounding air, soil and water. (Photo by Issei Kato/AP Photo/Pool)

Members of the media wearing protective suits and masks are escorted by TEPCO employees while walking near the building housing the plant's No. 4 reactor, center, and an under construction foundation, right, which will store the reactor's melted fuel rods at Tokyo Electric Power Co.'s Fukushima Dai-ichi nuclear power plant in Fukushima prefecture, Wednesday, March 6, 2013, ahead of the second anniversary of the March 11, 2011 tsunami and earthquake. Some 110,000 people living around the Fukushima Dai-ichi nuclear plant were evacuated after the massive March 11, 2011, earthquake and tsunami knocked out the plant's power and cooling systems, causing meltdowns in three reactors and spewing radiation into the surrounding air, soil and water. (Photo by Issei Kato/AP Photo/Pool)

A radiation monitor indicates 114.00 microsieverts per hour near the building housing the plant's No. 4 reactor, center, and an under construction foundation, right, which will store the reactor's melted fuel rods at Tokyo Electric Power Co.'s tsunami-crippled Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima prefecture, Wednesday, March 6, 2013, ahead of the second anniversary of the March 11, 2011 tsunami and earthquake. Some 110,000 people living around the nuclear plant were evacuated after the massive March 11, 2011, earthquake and tsunami knocked out the plant's power and cooling systems, causing meltdowns in three reactors and spewing radiation into the surrounding air, soil and water. (Photo by Issei Kato/AP Photo/Pool)