Japanese Agency Labels Radioactive Leak ‘Serious’

After giving the leak of water at the crippled Fukushima plant a Level 1 rating, the Nuclear Regulation Authority raised that to Level 3 or “serious incident.”

The Nuclear Regulation Authority originally gave a Level 1 rating — an “anomaly,” to the Aug. 19 leak of 300 tons (80,000 gallons) of water from a tank at the Fukushima Dai-ichi nuclear plant.

Last week it proposed raising that to Level 3 — a “serious incident” — and it made that change after consulting with the International Atomic Energy Agency.