Saturday, February 8, 2014

TEPCO to review eroneous radiation data

The operator of the damaged Fukushima Daiichi nuclear plant has decided to review radiation data after finding the initial readings may be much lower than actual figures.

Tokyo Electric Power Company, or TEPCO, says it has detected a record high 5
million becquerels per liter of radioactive strontium in groundwater collected last July from one of wells close to the ocean.

That's more than 160,000 times the state standard for radioactive wastewater normally released into the sea.

Based on the result, levels of radioactive substances that emit beta particles are estimated to be 10 million becquerels per liter, which is more than 10 times the initial reading.
TEPCO initially said it had detected 900,000 becquerels per liter of beta ray-emitting substances.

The utility attributes the error to the improper measuring method that had been used until last October. It says the readings of radioactivity can be measured as being lower than they actually are in the highly contaminated water.

TEPCO plans to review other data measured with the improper method, including the radiation level of around 300 tons of waste water that leaked from a storage tank in August.

An initial test of the leaked water found it contained up to 80-million becquerels per liter of beta ray-emitting substances, including strontium.