UPDATE 1-New highly radioactive leak at Japan's Fukushima plant

Thu Feb 20, 2014 10:19am IST

Related Topics

Stocks

   

* Worst radioactive water leak at Fukushima since last August

* Utility says water unlikely to have reached ocean

* Tepco strongly criticised for reaction to 2011 meltdowns (Adds company quote, radiation measurement, more details)

By Mari Saito

TOKYO, Feb 20 (Reuters) - The operator of Japan's Fukushima nuclear plant said on Thursday that 100 tonnes of highly contaminated water had leaked out of a tank, the worst incident since last August, when a series of radioactive water leaks sparked international alarm.

Tokyo Electric Power Co told reporters the latest leak was unlikely to have reached the ocean. But news of the leak at the site, devastated by a 2011 earthquake and tsunami, further undercut public trust in a utility rocked by a string of mishaps and disclosure issues.

"We are taking various measures, but we apologise for worrying the public with such a leak," said Masayuki Ono, a spokesman for the utility, also known as Tepco.

"Water is unlikely to have reached the ocean as there is no drainage in that tank area."

Tepco said water overflowed from a large storage tank at the site late on Wednesday after a valve had remained open by mistake and sent too much contaminated water into a separate holding area.

A worker patrolling the area, around 700 metres from the ocean, spotted drips of water leaking through a drain attached to the side of the tank.

The utility has been harshly criticsed for its response to the three nuclear meltdowns following the quake and tsunami at the plant, 220 km (130 miles) north of Tokyo.

A nuclear regulatory official last week said Tepco delayed release of record-high measurements of strontium-90 in groundwater despite repeated requests by the regulator.

Initial measurements of the latest incident showed the leaked water had a reading of 230 million becquerels per litre of beta-emitting radioactive isotopes, including strontium 90.

That level is almost equal to that recorded in last year's leak of 300 tonnes of contaminated water, deemed a "serious incident", or level three, on the seven-point international scale for radiological releases.

The legal limit for releasing strontium 90 into the ocean is 30 becquerels per litre. (Additional reporting by Kentaro Hamada; Editing by Dominic Lau and Ron Popeski)

FILED UNDER:

Religion and Politics

REUTERS SHOWCASE

Fund Raising

Fund Raising

Flipkart raises $700 million in fresh funding.   Full Article 

Reforms Push

Reforms Push

Modi may order insurance, coal reforms if vote delayed - officials.  Full Article 

Reuters Exclusive

Reuters Exclusive

India looks to sway Americans with nuclear power insurance plan  Full Article 

To Boost Growth

To Boost Growth

Crank up public spending to revive growth - chief economic adviser.   Full Article 

Bold Steps

Bold Steps

SpiceJet rescue plan marks bold bet on Indian aviation recovery.   Full Article 

New Airline

New Airline

Tata, Singapore Air venture Vistara to take off on Jan 9.  Full Article 

Online Sales

Online Sales

Knock knock. Who's there? Amazon's best-selling holiday author.  Full Article 

Hacking Attack

Hacking Attack

N.Korea says did not hack Sony, wants joint probe with U.S.  Full Article 

Reuters Poll

Reuters Poll

BSE Sensex to hit 32,980 by December 2015  Full Article 

Reuters India Mobile

Reuters India Mobile

Get the latest news on the go. Visit Reuters India on your mobile device  Full Coverage