Tokyo, April 3 (Jiji Press)–The Japanese government has failed to disclose a SPEEDI estimate that some 10 trillion becquerels per hour of radioactive iodine was released into the environment from the crippled Fukushima No. 1 nuclear power plant on March 14 last year, it was learned Tuesday.
Using the System for Prediction of Environmental Emergency Dose Information and based on iodine levels monitored in Chiba, east of Tokyo, the Japan Atomic Energy Agency came up with the figure on March 15 the same year, four days after Tokyo Electric Power Co.’s <9501> nuclear power plant in northeastern Japan was ravaged by the 9.0-magnitude earthquake and tsunami.
The independent government agency also calculated discharged cesium-134 and 137, both also radioactive, amounted to one trillion becquerels per hour each on that day.
But those SPEEDI estimates have never been disclosed to the public, due to poor communications between the JAEA and the Nuclear Safety Commission, informed sources said.
SPEEDI provides projections on the dispersal of radioactive substances based on meteorological, geographical and other data.
However, Japanese article of Jiji reports it was due to the poor communications between MEXT and the nuclear safety commission. It is not reported where this difference comes from.