Expert urges probe of No.2 reactor leak / NHK / November 29, 2011 /
The spike in radiation levels following unspecified trouble at the No.2 reactor on March 15th was much more prominent than on March 12th or 14th, when explosions hit the No.1 and No.3 reactors.
Shinichiro Kado, an associate professor at the University of Tokyo, calls the reactor containment vessel “a final fortress” for keeping radioactive substances trapped, and a “cornerstone” for the integrity of a nuclear plant.
Kado says a breach of the vessel is extremely grave.
He says TEPCO needs to clarify how radioactive substances were released, by cross-referencing data on reactor conditions and patterns of radioactive dispersion in the atmosphere.
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