Japan's largest utility said Thursday that more radiation than previously thought was released into the atmosphere in March 2011, in the days after the nuclear disaster that followed an earthquake and tsunami.
Q: I took my kid to the ER last night because his stomach hurt, and they ran a CAT scan. Is that normal? Should I be worried about radiation?
An author tracks the lives of the Fukushima nuclear workers. CNN's Kyung Lah reports.
When Pieter Franken visited Hong Kong one of the first things he did was measure the level of radiation in his hotel room.
One year ago, a series of events began with an earthquake off the cost of Japan that culminated in the largest accidental release of radioactivity into the ocean in history.
In the empty towns surrounding the ravaged Fukushima Daiichi power plant, piles of radioactive dirt serve as monuments to the difficulty of cleaning up the worst nuclear accident since Chernobyl.
One year later, risky working conditions still plague the recovery effort at the site of Japan's nuclear disaster.
Studies by the U.S. government and professional organizations conclude the level of radiation emitted by full-body airport scanners is safe for passengers, according to a Department of Homeland Security Inspector General report, but the findings likely will not end the dispute over backscatter X-ray machines.
As we travel down the road toward the 20-kilometer (12-mile) exclusion zone, the entryway is blocked by half a dozen police officers and a large sign flashing red lights. The sign reads: "Keep out. Don't enter."
An extraordinarily high level of radiation was detected in one spot in a central Tokyo residential district Thursday, prompting the local government to cordon off the small area, local officials said.
High levels of radiation have been found at the Fukushima Daiichi facility in Japan. CNN's Kyung Lah reports.Edit Instructions:
Workers at the crippled Fukushima Daiichi nuclear power plant have discovered a radioactive hot spot far more lethal than anything previously recorded at the damaged facility, the plant's owner reported Tuesday.
The Japanese MotoGP will go ahead as planned after a report found that radiation risks from the nearby Fukushima plant damaged in March's earthquake and tsunami were negligible.
On Tuesday, the San Francisco Board of Supervisors passed a new ordinance requiring cell phone retailers to display and distribute a state-produced fact sheet that explains radio frequency emissions from cell phones and how consumers can minimize their exposure.
San Francisco is once again moving forward with its controversial plan to warn consumers about potential health risks related to cell phone use.
A Japanese health official downplayed the dangers Tuesday after cesium contaminated meat from six Fukushima cows was delivered to Japanese markets and probably ingested.
Japan felt another strong earthquake early Sunday Morning, placing the area around the Fukushima Nuclear Power Plant in further jeopardy.
Columbia University's David Brenner talks to CNN about Japan's ongoing radiation fears.
Japanese researchers have found radiation in all 15 people tested last month from the area near the crippled Fukushima Daiichi nuclear power plant.
Four new areas in northern Japan have been added to the list of places affected by radiation originating from the Fukushima Daiichi nuclear plant, authorities said Friday.
Nuclear expert Arnie Gundersen talks to CNN's John King about the dangers of the radiation situation in Japan.
Famed physicist Michio Kaku says northern Japan was almost lost to a "100% core melt" in the Fukushima nuclear accident.
Japan released new details Tuesday of the battle to contain the Fukushima Daiichi nuclear accident, after disclosing that the crippled power plant spewed more than twice as much radioactivity as originally estimated.
World Health Organization says cell phone radiation could cause cancer. CNN's Nicole Collins reports.
Following the World Health Organization's announcement that radio frequency emissions from cell phones may increase the risk of some kinds of brain cancer, what do you need to know about the radiation coming from your phone?
A World Health Organization panel announced this week that microwave radiation from cell phones may cause cancer, and that people should use them less.
Cell phone users -- a group that, these days, means practically everybody -- are no doubt concerned about Tuesday's news that the World Health Organization (WHO) classifies cell phones as "possibly carcinogenic to humans."
Radiation from cell phones can possibly cause cancer, according to the World Health Organization.
Radiation from cell phones can possibly cause cancer, according to the World Health Organization. The agency now lists mobile phone use in the same "carcinogenic hazard" category as lead, engine exhaust and chloroform.
Worse-than-expected damage in one reactor is forcing a change of plans at Japan's Fukushima Daiichi nuclear power plant, but its owners say they still expect to end the 2-month-old crisis by January.
Japan's tsunami zone struggles to move on, both physically and emotionally, as CNN's Kyung Lah reports.
A Japanese nuclear plant will shut down its reactors after the country's prime minister warned it was vulnerable to natural disasters, its owner announced Monday.
The City of San Francisco's controversial cell phone radiation disclosure bill has been put on "indefinite hold," and a "watered-down version" will probably be enacted instead.
A special team of federal inspectors are looking into an incident at an Ohio nuclear power plant in which higher-than-normal radiation levels were detected in a work area, the U.S. Nuclear Regulatory Commission said Tuesday.
Japan will begin enforcing an often-flouted evacuation order and keep people out of the 20-km zone around the Fukushima Daiichi nuclear power plant, a top official announced Wednesday.
The iRobot is being used to test radiation levels in the damaged Fukushima Daiichi nuclear power plant in Japan.
A robot probe found sauna-like conditions inside the No. 2 reactor building at the Fukushima Daiichi nuclear power plant but lower levels of radiation than in other damaged units, the plant's owner reported Tuesday.
The death toll from Japan's earthquake and tsunami rose to nearly 14,000 on Monday as efforts continued to stabilize a crippled nuclear reactor plant.
Japanese regulators discounted concerns about damage to the still-potent spent fuel from the Fukushima Daiichi nuclear power plant's No. 4 reactor Thursday, saying high radiation levels reported earlier this week "most probably" came from outside debris.
In the wake of continued fires and explosions in nuclear plants in Japan, CNN chief medical correspondent Dr. Sanjay Gupta puts context around concerns of radiation.
The Nuclear Regulatory Commission will investigate an incident at a Nebraska nuclear plant in which three workers were accidentally exposed to radiation, it said in a statement Monday.
Japanese authorities Tuesday "provisionally" declared the country's nuclear accident a level-7 event on the international scale for nuclear disasters -- the highest level -- putting it on par with the 1986 Chernobyl disaster.
TEPCO releases video of 48-foot wave that crippled Japana's Fukushima Daiichi power plant.
Engineers used a flying drone to peer into the damaged reactors at the Fukushima Daiichi nuclear power plant Sunday as the crisis spurred more than 2,000 people to march against nuclear energy in Tokyo.
Japan's government has lifted restrictions on vegetables and milk from some parts of the country's north after inspections found radiation levels below legal limits for three straight weeks, a top government official announced Friday.
Workers at the Fukushima Daiichi nuclear power station returned to the plant Friday after a strong aftershock forced them to leave a day earlier, the plant's owner said.
Science expert Bill Nye explains why he thinks we should be worried about Japan dumping radioactive water in the ocean.
Japan may set standards for long-term radiation exposure that would effectively extend the evacuation zone around the damaged Fukushima Daiichi nuclear power plant, a top government official said Thursday, as a strong new aftershock rattled the area
Suzanne Malveaux and meteorologists Chad Myers explain the sealant, Liquid glass, used to plug leak in nuclear reactor.
From fishermen to merchant to restaurant, every part of Japan's fish industry struggles. CNN's Kyung Lah reports.
Japanese fishermen have taken the offensive in their fight against the owner of the stricken Fukushima Daiichi power plant, angrily calling the utility's actions insulting, incompetent and "unforgivable" over the course of the weeks-long nuclear crisis.
Students in many districts across Japan brushed off their uniforms and shouldered their bookbags for the first day of the new school year on Wednesday.
A group of kids displaced by Japan's disaster face their first day of the new school year with sadness and uncertainty.
The leak of highly radioactive water into the Pacific from the crippled Fukushima Daiichi nuclear plant has stopped, Tokyo Electric Power Company said early Wednesday.
Japan began dumping thousands of tons of radioactive water into the Pacific Ocean on Monday, an emergency move officials said was needed to curtail a worse leak from the crippled Fukushima Daiichi nuclear power plant.
TEPCO officials found a crack in a tunnel draining radioactive water into the Pacific. CNN's Martin Savidge reports.
The battle continued Monday to plug a crack at Japan's Fukushima Daiichi nuclear power facility that's been a conduit for highly radioactive water leaking into the Pacific Ocean, utility company officials said.
A first attempt to plug a cracked concrete shaft that is leaking highly radioactive water into the ocean off Japan failed Saturday, so officials are now exploring alternatives, spokesmen for Tokyo Electric Power Co. said.
Japan's health ministry announced Friday that there is no radioactive contamination of beef in the beleaguered country, saying an earlier report indicating there had been contamination was wrong.
Thousands of Japanese, still awaiting answers on the fate of their loved ones nearly three weeks after an immense earthquake and subsequent tsunami, were dealt another blow Thursday.
Radiation levels in a Japanese town outside a government-ordered evacuation zone have exceeded one of the criteria for evacuation, the International Atomic Energy Agency said Wednesday.
While workers trying to prevent a meltdown at the Fukushima Daiichi nuclear plant should not suffer short-term health effects if they stay below radiation limits set by the government, they should be monitored for health effects over the long term, experts said Wednesday.
I have heard that there is an increase in the number of people getting thyroid cancer. Is this true and is radiation from dental X-rays a cause for the increase?
Minuscule levels of radiation from Japan's Fukushima nuclear plant incident have been detected in a widening number of U.S. states, but the Environmental Protection Agency reaffirmed this week that the levels represent no threat to public health.
CNN's Suzanne Malveaux asked Martin Savidge about the soil contaminated by plutonium in 5 different locations at Japan's Fukushima plant.
Black smoke is rising from reactor 3 at the Fukushima Daiichi nuclear plant in Japan.
CNN's Paula Hancocks reports on possible setbacks in Japan's nuclear crisis.
A power company apologized Saturday and said the exposure of three workers at the Fukushima Daiichi power plant to highly radioactive water might have been avoided with better communication.
Japanese officials say contaminated water may be leaking from the nuclear reactor core at the Fukushima Daiichi plant.
Levels of radioactive iodine in seawater just offshore of the embattled Fukushima Daiichi nuclear plant spiked to more than 1,250 times higher than normal, Japan's nuclear and industrial safety agency said Saturday.
With half of its leaders missing, residents of Otsuchi, Japan, struggle to rebuild their lives. CNN's Kyung Lah reports.
Authorities in Japan raised the prospect Friday of a likely breach in the all-important containment vessel of the No. 3 reactor at the stricken Fukushima Daiichi nuclear power plant, a potentially ominous development in the race to prevent a large-scale release of radiation.
Japan's government will offer transportation and other assistance to those in a buffer zone around the stricken Fukushima Daiichi nuclear plant, a top official said Friday, noting these people have been put in a "difficult" situation.
CNN's Dr. Sanjay Gupta discusses radiation concerns from Japan and whether it could affect U.S. food supplies.
Colorado and Oregon have joined several other Western states in reporting trace amounts of radioactive particles that have likely drifted about 5,000 miles from a quake and tsunami-damaged nuclear power plant in Japan, officials say.
A Japanese family contemplates moving, while struggling to provide their baby with non-contaminated food and water.
Despite being urged not to hoard bottled water, residents of Japan's capital on Wednesday snapped it up in droves after testing showed radioactive material in tap water at levels unsafe for infants.
Crew members on the USS Ronald Reagan scrub and water down surfaces to decontaminate from radiation exposure.
Japan's Health Ministry reported Tuesday finding radioactive materials at levels "drastically exceeding legal limits" in 11 types of vegetable grown in Fukushima Prefecture, including broccoli and cabbage, according to Kyodo News Agency.
Japan's alarm over radiation found in spinach and milk has also raised questions, given that little is known about its effect on the human body.
A flight attendants' group is distributing radiation dosimeters to a sampling of its members as assurance that they are not being exposed to harmful radiation levels on trips to and from Japan.
CNN's Stan Grant dispels some of the misconceptions and half-truths about radiation and how it spreads.
After the Chernobyl nuclear power plant disaster, Soviet soldiers had to do the hard, potentially risky, cleanup job. Fears of radiation exposure, sickness and death were rampant. In the months after, however, it wasn't the rate of cancer that increased: it was the rate of suicide.
CNN's Jason Carroll looks at how the situation in Japan is being compared to previous nuclear accidents.
Authorities in Japan are battling to resolve a series of crises at the nuclear power plant at Fukushima Daiichi, which was badly hit by the devastating earthquake and tsunami that struck over a week ago.
American teachers Jessica Besecker and Edward Corey Clemons have been located in tsunami-ravaged Japan.
As searches for nearly 13,000 missing continued Sunday, police in Japan said 8,199 people had died since the monster earthquake and ensuing tsunami struck last week.
TEPCO releases what they say are recent aerials of the Fukushima Daiichi nuclear power plant in Japan
Crews struggling to bring the crippled Fukushima Daiichi nuclear plant under control had some success Sunday as cooling systems at two of the facility's reactors were working, Kyodo News reported.
In the decorous chambers of the House Energy and Commerce Subcommittee on Wednesday a U.S. bureaucrat launched a tsunami of panic that has spread further worldwide than the real tsunami that devastated much of Japan on March 11.
Seawalls surrounding a town in Japan were no match for a tsunami. NHK has more.
The recent events at one of Japan's nuclear energy complexes will renew the debate on the safety of nuclear power plants for generating our energy needs.
The disclosure Saturday by Japanese authorities that milk and spinach have shown higher-than-normal levels of radiation contamination has raised concerns about food safety and supplies in one of Japan's most heavily populated regions.
The cities flattened by last week's earthquake look eerily similar to the decimated buildings Shigeko Sasamori saw after an atomic bomb was dropped on her hometown in 1945.
Japan's WWII nuclear bombing survivors reflect on the current nuclear crisis. CNN's Kyung Lah reports.
In the wake of the crisis in Japan, the U.S. Food and Drug Administration is advising consumers to beware of inadvertently buying fake iodide products that are supposed to help protect against radiation.
A system deployed decades ago monitors radiation levels around the clock. CNN's Dan Simon reports.
Mutated animal and plant life and a no-go area for humans - could the area around the Fukushima Daiishi nuclear facility become a radioactive hazard zone?
Instead of worrying about the unlikely event of harmful radiation drifting from Japan, Californians should focus on preparing for earthquakes and other emergencies common in their own state, officials said.
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