The International Atomic Energy Agency reported today that the level of radioactivity at the Daiichi plant has fallen sharply from a rate of 1, 190 millirem per hour to 60 millirem per hour with a span of 6 hours.
But according to follow-up studies reported by the Nuclear Regulatory Commission (NRC), the resulting average dose of radiation that about 2 million people in the TMI area received amounted to 1 millirem, six times less than exposure to a single standard chest x-ray.