Tokyo Electric on Sunday confirmed lethally high radiation levels inside the primary containment vessel of reactor 1 at the heavily damaged Fukushima No. 1 nuclear plant but found they were not nearly as high as those recently logged in reactor 2.
Using a camera-equipped robot on Saturday, Tepco logged 7.8 sieverts per hour on some grating inside the vessel and 1.5 sieverts per hour in water pooled at its bottom.
Those figures are far lower than the 210 sieverts per hour measured at one spot in the PVC of the No. 2 reactor last month, but they are still extremely high.
The four-day probe launched by Tepco on Saturday is aimed at locating the melted fuel rods inside the No. 1 reactor building.
The primary mission of the robot is to investigate the bottom of the containment vessel to see if it can capture images of the melted fuel. Debris is believed to have penetrated the vessel and fallen into the surrounding containment vessel as a result of the heavy damage inflicted by the March 2011 tsunami that devastated eastern Tohoku.
The pressure vessel is the main component of the reactor and contains the fuel rod assemblies. Finding the exact location and condition of the melted fuel is considered critically important to dismantling the reactors.
However, the high radiation inside poses a daunting challenge for those involved in the decommissioning work.
STREET FOOD! We're back for more in one of Japan's most traditional cities, Nara.
What was once Japan's capitol is now a place loaded with delicious street food for humans and deer alike. So, what's Nara got to offer? I hope you're hungry! (ONLY in JAPAN )
Japan's Liberal Democratic Party on Friday submitted a record of email exchanges in which Akie Abe, Prime Minister Shinzo Abe's wife, denies her alleged payment of one million yen to an embattled school operator. (Jiji)
Japanese Defense Minister Tomomi Inada ordered the Ground Self-Defense Force on Friday to withdraw its engineering troops taking part in a U.N. peacekeeping mission in South Sudan by the end of May. (Jiji)
New textbooks authorized for use in Japan's senior high schools from April next year contain more descriptions on foreign and defense policies undertaken by Prime Minister Shinzo Abe's government, such as the ability to engage in collective self-defense, according to the results of the education ministry's latest textbook screening disclosed Friday. (Japan Today)