Inside The Fukushima Nuclear Plant

01. Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant is seen in this still image taken from a video shot by an unmanned helicopter on April 10, 2011 and released by TEPCO April 11, 2011, one month after the 9.0 magnitude earthquake and tsunami battered Japan's northeast coast. Mandatory Credit. REUTERS/Tokyo Electric Power Co/Handout

02. Tsunami waves hit the seawall at the Fukushima Daiichi nuclear power plant in these still images taken from a March 11, 2011 video released by Tokyo Electric Power Co (TEPCO). Japan marked a month on Monday since the magnitude 9.0 earthquake and tsunami that killed thousands and created an ongoing nuclear crisis.

03. Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No. 3 reactor in Fukushima prefecture, northern Japan is seen in this still image taken from a video shot by an unmanned helicopter on April 10, 2011 and released by TEPCO April 11, 2011, one month after the 9.0 magnitude earthquake and a huge tsunami battered Japan's northeast coast. Mandatory Credit. REUTERS/Tokyo Electric Power Co/Handout

04. Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.1 reactor is seen in this still image taken from a video shot by an unmanned helicopter on April 10, 2011 and released by TEPCO April 11, 2011, one month after the 9.0 magnitude earthquake and tsunami battered Japan's northeast coast. Mandatory Credit. REUTERS/Tokyo Electric Power Co/Handout

05. Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.4 reactor is seen in this still image taken from a video shot by an unmanned helicopter on April 10, 2011 and released by TEPCO April 11, 2011, one month after the 9.0 magnitude earthquake and tsunami battered Japan's northeast coast. Mandatory Credit. REUTERS/Tokyo Electric Power Co/Handout

06. Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant is seen in this still image taken from a video shot by an unmanned helicopter on April 10, 2011 and released by TEPCO April 11, 2011, one month after the 9.0 magnitude earthquake and tsunami battered Japan's northeast coast. Mandatory Credit. REUTERS/Tokyo Electric Power Co/Handout

07. Floating silt fence to block the spread of contaminated water from Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant is pictured at the complex of the nuclear plant in Fukushima, northern Japan April 10, 2011 in this handout released by TEPCO April 11, 2011, one month after the 9.0 magnitude earthquake and tsunami battered Japan's northeast coast. Mandatory Credit. REUTERS/Tokyo Electric Power Co/Handout

08. A remote-controlled unmanned excavator clears rubble at the complex of Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant in Fukushima, northern Japan April 10, 2011, in this handout photo released by TEPCO April 11, 2011, one month after the 9.0 magnitude earthquake and tsunami battered Japan's northeast coast. Picture taken April 10, 2011. Mandatory credit. REUTERS/Tokyo Electric Power Co/Handout

09. Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.3 reactor is seen in this still image taken from a video shot by "T-hawk," an unmanned helicopter, on April 10, 2011 and released by TEPCO April 11, 2011, one month after the 9.0 magnitude earthquake and tsunami battered Japan's northeast coast. Mandatory Credit. REUTERS/Tokyo Electric Power Co/Handout

10. Workers in protective suits operate remote-controlled machinery to clear debris in the compound of Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant in Fukushima, northern Japan in this April 10, 2011, handout file photo released by TEPCO. Japan raised the severity of its nuclear disaster to the highest level on April 12, 2011, putting it on a par with the world's worst disaster nuclear accident at Chernobyl after another major aftershock rattled the quake-ravaged east. Picture taken April 10, 2011. Mandatory Credit. REUTERS/Tokyo Electric Power Co/Handout/Files

11. Smoke is seen coming from the area of the No. 3 reactor of the Fukushima Daiichi nuclear power plant in Tomioka, Fukushima Prefecture in northeastern Japan in this handout file photo distributed by the Tokyo Electric Power Co. on March 21, 2011. Japan raised the severity of its nuclear disaster to the highest level on April 12, 2011, putting it on a par with the world's worst disaster nuclear accident at Chernobyl after another major aftershock rattled the quake-ravaged east. Picture taken March 21, 2011. REUTERS/Tokyo Electric Power Co./Files

12. A U.S. military barge carrying pure water (bottom) leaves the quay near Tokyo Electric Power Co.'s Fukushima Daiichi Nuclear Power Plant to refill with pure water in Fukushima Prefecture, in this photo taken April 4 and released by Japan's Maritime Self-Defense Force on April 6, 2011. Japan raised the severity of its nuclear disaster to the highest level on April 11, 2011, putting it on a par with the world's worst disaster nuclear accident at Chernobyl after another major aftershock rattled the quake-ravaged east. Picture taken April 4, 2011. REUTERS/Japan Maritime Self-Defence Force/Handout/Files

13. An aerial view of the Fukushima Daiichi Nuclear Power Station is seen in Fukushima Prefecture in this photo taken by the Air Photo Service on March 24, 2011. Japan raised the severity of its nuclear disaster to the highest level on April 12, 2011, putting it on a par with the world's worst disaster nuclear accident at Chernobyl after another major aftershock rattled the quake-ravaged east. Picture taken on March 24, 2011. Mandatory Credit REUTERS/Air Photo Service/Files

14. Fire and smoke are seen at a building for sampling from seawater near No.4 reactor of the Tokyo Electric Power Co.'s Fukushima Daiichi Nuclear Power Plant in Fukushima Prefecture in this handout photo taken on April 12, 2011. A fire broke out at Japan's crippled Fukushima Daiichi nuclear power plant, operator Tokyo Electric and Power (TEPCO) said on Tuesday, although flames and smoke were no longer visible. A worker saw fire at a building near the No.4 reactor at around 6:38 a.m. (21:38 GMT) and a fire fighting unit of the Self Defence Forces was sent to fight the blaze, a TEPCO spokesman said. Mandatory credit REUTERS/Tokyo Electric Power Co. (TEPCO)/Handout

15. A facility for a sampling from seawater is seen after a fire was extinguished near No.4 reactor of the Tokyo Electric Power Co.'s Fukushima Daiichi Nuclear Power Plant in Fukushima Prefecture in this handout photo taken on April 12, 2011. A fire broke out at Japan's crippled Fukushima Daiichi nuclear power plant, operator Tokyo Electric and Power (TEPCO) said on Tuesday, although flames and smoke were no longer visible. A worker saw fire at a building near the No.4 reactor at around 6:38 a.m. (21:38 GMT) and a fire fighting unit of the Self Defence Forces was sent to fight the blaze, a TEPCO spokesman said. Mandatory credit REUTERS/Tokyo Electric Power Co. (TEPCO)/Handout

16. Workers operate a modified Putzmeister 70Z, the world's largest concrete pump mounted on a truck, to pump contaminated water to the No.4 reactor at Fukushima Daiichi Nuclear Power plant in Fukushima Prefecture, in this handout photo released by Tokyo Electric Power Co. (TEPCO) on April 12, 2011. Japan put its nuclear calamity on a par with the world's worst nuclear disaster, Chernobyl, on Tuesday after new data showed that more radiation leaked from its earthquake and tsunami-crippled power plant in the early days of the crisis than first thought. REUTERS/Tokyo Electric Power Co. (TEPCO)/Handout

17. The crippled Fukushima Daiichi Nuclear Power plant is seen in Fukushima Prefecture in this undated handout photo released by Tokyo Electric Power Co. (TEPCO) April 14, 2011. The utility giant is still working on a detailed plan to end the country's nuclear crisis a month after it began as tests showed radiation levels in the sea near the complex had spiked. REUTERS/Tokyo Electric Power Co. (TEPCO)/Handout

18. The crippled Fukushima Daiichi Nuclear Power plant is seen in Fukushima Prefecture in this undated handout photo released by Tokyo Electric Power Co. (TEPCO) April 14, 2011. The utility giant is still working on a detailed plan to end the country's nuclear crisis a month after it began as tests showed radiation levels in the sea near the complex had spiked. REUTERS/Tokyo Electric Power Co. (TEPCO)/Handout

19. The crippled Fukushima Daiichi Nuclear Power plant is seen in Fukushima Prefecture in this undated handout photo released by Tokyo Electric Power Co. (TEPCO) April 14, 2011. The utility giant is still working on a detailed plan to end the country's nuclear crisis a month after it began as tests showed radiation levels in the sea near the complex had spiked. REUTERS/Tokyo Electric Power Co. (TEPCO)/Handout

20. The crippled Fukushima Daiichi Nuclear Power plant is seen in Fukushima Prefecture in this undated handout photo released by Tokyo Electric Power Co. (TEPCO) April 14, 2011. The utility giant is still working on a detailed plan to end the country's nuclear crisis a month after it began as tests showed radiation levels in the sea near the complex had spiked. REUTERS/Tokyo Electric Power Co. (TEPCO)/Handout

21. Temporary water tanks, which is capable of storing highly contaminated radiation water, are pictured in front of Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No. 4 reactor in Fukushima, northern Japan April 14, 2011, in this handout photo released by TEPCO April 15, 2011. Picture taken April 14, 2011. REUTERS/Tokyo Electric Power Co/Handout

22. Debris covers above the surface of a spent fuel pool of Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.3 reactor in Fukushima, northern Japan April 14, 2011, in this handout photo released by TEPCO April 15, 2011. Picture taken April 14, 2011. REUTERS/Tokyo Electric Power Co/Handout

23. A sampling procedure is being conducted at Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.4 reactor's spent fuel pool in Fukushima, northern Japan April 12, 2011, in this handout photo released by TEPCO April 15, 2011. Picture taken April 12, 2011. REUTERS/Tokyo Electric Power Co/Handout

24. A sampling procedure is being conducted at Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.4 reactor's spent fuel pool in Fukushima, northern Japan April 12, 2011, in this handout photo released by TEPCO April 15, 2011. Picture taken April 12, 2011. REUTERS/Tokyo Electric Power Co/Handout

25. Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No. 1 reactor building is pictured by a T-Hawk drone, a remote controlled helicopter, in Fukushima, northern Japan April 14, 2011, in this handout photo released by TEPCO April 15, 2011. Picture taken April 14, 2011. REUTERS/Tokyo Electric Power Co/Handout

26. Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No. 4 reactor building is pictured by a T-Hawk drone, a remote controlled helicopter, in Fukushima, northern Japan April 14, 2011, in this handout photo released by TEPCO April 15, 2011. Picture taken April 14, 2011. REUTERS/Tokyo Electric Power Co/Handout

27. Sandbags containing Zeolite, a mineral which absorbs radiation, are being submerged into the sea near Tokyo Electric Power Co's Fukushima Dai-ichi Nuclear Powerplant No.3 reactor in Fukushima, northern Japan April 15, 2011, in this handout photo released by TEPCO April 16, 2011. Picture taken April 15, 2011. REUTERS/Tokyo Electric Power Co/Handout

28. In this image taken by T-Hawk drone aircraft, Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.3 reactor building is seen in Fukushima, northern Japan April 15, 2011, in this handout photo released by TEPCO April 16, 2011. Japan has told the U.N. atomic agency that 28 nuclear workers have received high radiation doses as they battle to stabilise the stricken Fukushima Daiichi power plant. Picture taken April 15, 2011. Mandatory Credit REUTERS/Tokyo Electric Power Co/Handout

29. In this image taken by T-Hawk drone aircraft, Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.3 reactor building is seen in Fukushima, northern Japan April 15, 2011, in this handout photo released by TEPCO April 16, 2011. Japan has told the U.N. atomic agency that 28 nuclear workers have received high radiation doses as they battle to stabilise the stricken Fukushima Daiichi power plant. Picture taken April 15, 2011. Mandatory Credit REUTERS/Tokyo Electric Power Co/Handout

30. In this image taken by T-Hawk drone aircraft, Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.3 reactor building's rooftop is seen in Fukushima, northern Japan April 15, 2011, in this handout photo released by TEPCO April 16, 2011. Japan has told the U.N. atomic agency that 28 nuclear workers have received high radiation doses as they battle to stabilise the stricken Fukushima Daiichi power plant. Picture taken April 15, 2011. Mandatory Credit REUTERS/Tokyo Electric Power Co/Handout

31. In this image taken by T-Hawk drone aircraft, Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.4 reactor's operating floor which has been exposed due to a destruction of its exterior after being damaged by the tsunami is seen in Fukushima, northern Japan April 15, 2011, in this handout photo released by TEPCO April 16, 2011. Japan has told the U.N. atomic agency that 28 nuclear workers have received high radiation doses as they battle to stabilise the stricken Fukushima Daiichi power plant. Picture taken April 15, 2011. Mandatory Credit REUTERS/Tokyo Electric Power Co/Handout

32. In this image taken by T-Hawk drone aircraft, Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.4 reactor's operating floor which has been exposed due to a destruction of its exterior after being damaged by the tsunami is seen in Fukushima, northern Japan April 15, 2011, in this handout photo released by TEPCO April 16, 2011. Japan has told the U.N. atomic agency that 28 nuclear workers have received high radiation doses as they battle to stabilise the stricken Fukushima Daiichi power plant. Picture taken April 15, 2011. Mandatory Credit REUTERS/Tokyo Electric Power Co/Handout

33. In this image taken by T-Hawk drone aircraft, Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.4 reactor building in Fukushima, northern Japan April 15, 2011 is seen in this handout photo released by TEPCO April 16, 2011. Japan has told the U.N. atomic agency that 28 nuclear workers have received high radiation doses as they battle to stabilise the stricken Fukushima Daiichi power plant. Picture taken April 15, 2011. Mandatory Credit REUTERS/Tokyo Electric Power Co/Handout

34. In this image taken by T-Hawk drone aircraft, Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.4 reactor's spent fuel pool is seen in Fukushima, northern Japan April 15, 2011, in this handout photo released by TEPCO April 16, 2011. Japan has told the U.N. atomic agency that 28 nuclear workers have received high radiation doses as they battle to stabilise the stricken Fukushima Daiichi power plant. Picture taken April 15, 2011. Mandatory Credit REUTERS/Tokyo Electric Power Co/Handout

35. In this image taken by T-Hawk drone aircraft, Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.4 reactor building's rooftop is seen in Fukushima, northern Japan April 15, 2011, in this handout photo released by TEPCO April 16, 2011. Japan has told the U.N. atomic agency that 28 nuclear workers have received high radiation doses as they battle to stabilise the stricken Fukushima Daiichi power plant. Picture taken April 15, 2011. REUTERS/Tokyo Electric Power Co/Handout

36. In this image taken by T-Hawk drone aircraft, Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.4 reactor building is seen in Fukushima, northern Japan April 15, 2011, in this handout photo released by TEPCO April 16, 2011. Japan has told the U.N. atomic agency that 28 nuclear workers have received high radiation doses as they battle to stabilise the stricken Fukushima Daiichi power plant. Picture taken April 15, 2011. Mandatory Credit REUTERS/Tokyo Electric Power Co/Handout

37. In this image taken by T-Hawk drone aircraft, Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.1 reactor building's rooftop is seen in Fukushima, northern Japan April 15, 2011, in this handout photo released by TEPCO April 16, 2011. Japan has told the U.N. atomic agency that 28 nuclear workers have received high radiation doses as they battle to stabilise the stricken Fukushima Daiichi power plant. Picture taken April 15, 2011. Mandatory Credit REUTERS/Tokyo Electric Power Co/Handout

38. Tokyo Electric Power Company, Inc. (TEPCO) Chairman Tsunehisa Katsumata (L) is seen beside the company officials during a news conference at the company head office in Tokyo April 17, 2011. Japanese nuclear power plant operator TEPCO hopes it will be able to achieve cold shutdown of its crippled Fukushima Daiichi nuclear plant within six to nine months, the company said on Sunday. Katsumata said he was considering resigning over the accident, but that he couldn't say when. REUTERS/Issei Kato

39. A remote-controlled robot called "Packbot", which has capabilities including manoeuvring through buildings, taking images, and measuring radiation levels, opens a door at Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.3 reactor building in Fukushima, northern Japan April 17, 2011, in this handout photo released by TEPCO. Japan's Tokyo Electric Power said on Sunday it hoped to achieve a "cold shutdown" of its crippled Fukushima Daiichi nuclear plant in six to nine months, setting a timeframe for bringing the world's worst nuclear crisis in 25 years under control. REUTERS/Tokyo Electric Power Co/Handout

40. A remote-controlled robot called Packbot, which has capabilities including maneuvering through buildings, taking images, and measuring radiation levels, opens a door at Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.3 reactor building in Fukushima, northern Japan April 17, 2011, in this handout photo released by TEPCO. Japan's Tokyo Electric Power said on Sunday it hoped to achieve a "cold shutdown" of its crippled Fukushima Daiichi nuclear plant in six to nine months, setting a timeframe for bringing the world's worst nuclear crisis in 25 years under control. Mandatory Credit REUTERS/Tokyo Electric Power Co/Handout

41. A remote-controlled robot called Packbot, which has capabilities including manoeuvring through buildings, taking images, and measuring radiation levels, opens a door at Tokyo Electric Power (TEPCO) Co.'s crippled Fukushima Daiichi Nuclear Power Plant No.3 reactor building in Fukushima, northern Japan April 17, 2011, in this handout photo released by TEPCO. Japan's Tokyo Electric Power said on Sunday it hoped to achieve a "cold shutdown" of its crippled Fukushima Daiichi nuclear plant in six to nine months, setting a timeframe for bringing the world's worst nuclear crisis in 25 years under control. Mandatory Credit REUTERS/Tokyo Electric Power Co/Handout