Subscribe to our free daily newsletters
. Earth Science News .

Subscribe to our free daily newsletters

Japan using gas to avoid explosion at nuclear plant

by Staff Writers
Tokyo (AFP) April 7, 2011
Workers at Japan's stricken nuclear plant on Thursday pumped nitrogen gas into a crippled reactor in a bid to contain the world's worst atomic accident for 25 years and prevent a possible explosion.

With the crisis at the Fukushima Daiichi plant approaching its fourth week, operator Tokyo Electric Power said it was concerned a build-up of hydrogen gas at the No. 1 reactor could cause another explosion at the site.

The fresh challenge underscored the fragility of the situation at the stricken plant, after rare progress was seen Wednesday when workers plugged a hole spewing highly radioactive water into the ocean.

TEPCO officials say hydrogen building up in the housing around reactor No. 1 could mix with incoming oxygen, creating an explosion.

Experts say the risk of a detonation could rise as the nuclear fuel rods cool and as the steam inside the containment vessel condenses into water, reducing pressure inside the unit and drawing air in through cracks.

The move came as an assessment by the US Nuclear Regulatory Commission dated March 26 emerged, citing persistent and growing threats at the plant, including the risk of gas build up and explosions.

Workers began pumping in nitrogen, an inert gas abundant in the atmosphere, which they hope will displace the oxygen. The process to inject 6,000 cubic metres will take around six days, TEPCO said.

"Workers started injecting nitrogen gas at 1:31 am (1631 GMT Wednesday). Since the pressure level went up, they confirmed that the gas was successfully going into the container," said a spokesman with Japan's nuclear safety agency.

TEPCO said it was also planning to inject nitrogen gas into reactors number 2 and 3 as a protective measure.

In the days after the earthquake and tsunami crippled the plant, large explosions resulted from hydrogen accumulation near the reactors, damaging the outer buildings housing them.

A 20-kilometre (13-mile) exclusion zone around the plant has forced tens of thousands of people to evacuate.

The plant has emitted radioactive material into the air, contaminating drinking water and farm produce, with radioactive iodine above legal limits detected in vegetables, dairy products and mushrooms.

Nuclear concerns continue to distract from the March 11 disaster that has left more than 12,000 dead and over 15,000 missing.

TEPCO, whose shares have lost around 85 percent of their pre-quake value, has said it may need state help to meet claims some analysts say could reach 10 trillion yen ($118 billion).

On Wednesday, the government promised compensation for the fishing industry, a day after increasing unease about the contamination led it to impose a legal limit for radioactive iodine in seafood for the first time.

Levels of radioactive iodine-131 and caesium in seawater immediately outside the plant have spiked, stoking fears over marine life in a country whose diet depends heavily on seafood.

TEPCO has also continued a separate operation to release 11,500 tonnes of lower-level radioactive water into the sea to free up urgently needed storage space for water so toxic that it is hampering crucial repair work.

The water dumping has angered the fishing industry and on Wednesday Ikuhiro Hattori, the head of Japan Fisheries Cooperatives, visited the company's headquarters to protest.

The triple crisis has slashed the number of foreigners travelling to Japan's two main airports by two-thirds to a daily average of just over 5,000.

The wider economic impact from the quake, tsunami and nuclear emergency is likely to drive the country into recession in the coming months, many economists now say.

Share This Article With Planet Earth DiggDigg RedditReddit
YahooMyWebYahooMyWeb GoogleGoogle FacebookFacebook

Related Links
Bringing Order To A World Of Disasters
A world of storm and tempest
When the Earth Quakes

Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News

Japan plant operator offers 'consolation' payments
Tokyo (AFP) April 5, 2011
The operator of a stricken Japanese nuclear plant has offered "consolation" payments to 10 nearby municipalities whose residents have been forced to evacuate, the company said Tuesday. But in an illustration of public anger against Tokyo Electric Power, the utility at the centre of the world's worst nuclear crisis in 25 years, one of the municipalities refused the 20 million yen ($237,300) ... read more

New Zealand ready to bail out quake-hit insurer

Japan using gas to avoid explosion at nuclear plant

Japan plant operator offers 'consolation' payments

Tsunami-stranded dog reunited with owner in Japan

Japan stems uncontrolled leak from nuclear plant

Facebook launches page for journalists

Radioactive water leak into sea stops at Fukushima: Jiji

'Skype school' brings knowledge to Indian village

Brazil should consult natives on Amazon dam: panel

First Broad-Scale Maps Of Life On The Sea-Shelf

World's Reef Fishes Tussling With Human Overpopulation

Dive dive dive: new adventure for Virgin stuntman

U.N.: Arctic sees record ozone loss

Human Impacts On The Marine Ecosystems Of Antarctica

Fishermen, greens see red over Alaska navy exercises

Antarctic Icebergs Play A Previously Unknown Role In Global Carbon Cycle, Climate

Research On Satellite Imagery Aims To Advance Sustainable Agriculture

Romanian agriculture minister pleads for GM soy

Huge rooftop greenhouse is Montreal's local farm

Quake-hit sake brewers urge Japanese to party

US forecasters predict busy 2011 hurricane season

S.Korea proposes fresh volcano talks with N.Korea

Oregon volcano to be monitored

Son becomes guardian of Indonesian volcano

167 foreigners leave Ivory Coast main city: French military

French, UN troops in action against Gbagbo camp: France

Ivory Coast opposition blockade lifted, police desert: UN

A New Scramble For African Riches - Its Consumers

Elevated Levels Of Sodium Blunt Response To Stress

Hookah Use Widespread Among College Students

It's Not Over When It's Over: Storing Sounds In The Inner Ear

Archaeologists Explore Iraqi Marshes For Origins Of Urbanization

The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement