Following up this article..Chemical complex had second explosion and radiation measurement is nearly impossible
After fire was finally extinguished at 14:30 of 4/23, when 36 hours had passed from the first explosion, Nuclear and Industrial Safety Agency investigated the plant in AM of 4/24 with police and fire department.
The state of radioactive contamination is still not known. The depleted uranium was stocked at 400m away from the exploded point but glasses of the windows were broken at 6km north to the plant and the explosion caused an earthquake of scale 1 in Iwakuni city, Waki cho and Otake city.
On 4/24, 6 tones and 6m’s long debris was found at the outlet of Oze river between Yamaguchi and Hiroshima prefecture, where is 700m away from the plant.
It is a steel part of oxidizing reactor, which was damaged the most.