On Wednesday, a week after initial consideration, Japan’s nuclear regulator made the decision to move the situation unfolding at the crippled Fukushima nuclear plant from a level one “Anomaly” on the International Nuclear Event Scale (INES), to a level three “Serious Incident”.
Last Monday Tokyo Electric Power Company announced that 300 tons of radioactive water had leaked from a storage tank into the ground. The situation at the time was given a level one on the INES.
Two days the after the initial rating Japan's Nuclear Regulation Authority (NRA) first announced considerations of upping the situation on the scale.
TEPCO claimed that the radioactivity of the leaked water would give a human a 5-year dose of radiation for every hour of exposure. A situation that is far from a anomaly.