NHK World has the story here about the puddle which injured 2 workers, exposing them to over 170 millisieverts while laying cable near the reactor 3 turbine room:
The level of radioactive cerium-144 was 2.2 million becquerels. Also, 1.2 million becquerels of iodine-131 was measured. These substances are generated during nuclear fission inside a reactor.
Tokyo Electric says damage to the No.3 reactor and spent nuclear fuel rods in a storage pool may have produced the highly radioactive water.
The level of radioactive cerium-144 was 2.2 million becquerels. Also, 1.2 million becquerels of iodine-131 was measured. These substances are generated during nuclear fission inside a reactor.
Tokyo Electric says damage to the No.3 reactor and spent nuclear fuel rods in a storage pool may have produced the highly radioactive water.
