The Nuclear Safety Commission under the Prime Minister’s Office disclosed on April 23 that the amount of radioactive materials being released from the TEPCO Fukushima I Nuclear Power Plant was 154 terabecquerels per day (1 tera is 1 trillion) as late as April 5 when the amount being released was considered stabilized.
On April 5, the estimated amount of radioactive materials released from Fukushima I Nuke Plant was 0.69 terabecquerels/hour for iodine-131 and 0.14 terabecquerels/hour for cesium-137. When the numbers were recalculated according to the INES method (converting cesium amount into iodine equivalent), the amount released turned out to be 6.4 terabecquerels/hour (which was 154 terabecquerels per day. Previously, the Nuclear Safety Commission had simply added the numbers for iodine-131 and cesium-137, and announced it was less than 1 terrabecquerel per hour
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http://enenews.com/daily-radioactive-release-from-fukushima-is-150-times-higher-than-previously-announced-154-trillion-becquerels-released-everyday