Reuters, Aug 20, 2013: The operator of Japan’s crippled Fukushima nuclear plant said on Tuesday it believes about 300 tonnes of highly contaminated water has leaked from a storage tank [...] Japan’s Nuclear Regulation Authority has classified the leak as a level 1 incident [... There's] growing alarm of neighbouring countries. [... Tepco] has also been accused of covering up the extent of the problems at the plant. [...] A spokesman for the operator [said] the leaked water contains 80 million becquerels of radiation per litre [...] the storage tank [...] is about 500 metres (550 yards) from the shore [...]
Voice of America correspondent Steve Herman, Aug 20, 2013: Leaked water most likely flowed into soil at #Fukushima-1 plant. Readings recorded of 80 million Bq/liter.
Kyodo News, Aug 20, 2013: Roughly 300 tons of water contaminated with radioactive substances have leaked from water storage tanks [... Tepco] said it detected in the leaked water radioactive substances emitting beta rays, with an extremely high reading of 80 million becquerels per liter [...] TEPCO said the toxic water most likely flowed into the soil. The utility has yet to identify the exact source of the leak.
NHK, Aug 20, 2013: TEPCO officials say an inspection showed a drop in the water level inside one of the 26 tanks. They estimate that the tank has lost about 300 out of the roughly 1,000 tons of water it held.
Japan Today, Aug 20, 2013: “We have instructed TEPCO to find the source of contaminated water—from which tank the water is leaking—and to seal the leakage point,” a [nuclear] regulatory official said. “We have also instructed them to retrieve contaminated soil to avoid a further expansion of toxic water, and to strengthen monitoring of the surrounding environment.”
Calculations: Roughly 300 metric tons = Roughly 300,000 liters × 80 million Bq of beta radiation per liter = Roughly 24,000,000,000,000 Bq of total beta radiation (~24 trillion Bq)
Published: August 20th, 2013 at 12:59 am ET