News / Asia

    US Nuclear Experts Worry About Possible Japan Reactor Meltdown

    Fukushima Daiichi power plant's Unit 1 is seen in Okumamachi, Fukushima prefecture, Japan, Friday, March 11, 2011
    Fukushima Daiichi power plant's Unit 1 is seen in Okumamachi, Fukushima prefecture, Japan, Friday, March 11, 2011

    Tens of thousands of residents near a nuclear plant in Japan were evacuated Saturday after an explosion at the plant, 240 kilometers north of Tokyo.  The reactor failure follows a devastating earthquake and tsunami that struck northeastern Japan on Friday.

    Japanese officials have reassured the public, saying there is no danger of a meltdown of the reactor core. But US nuclear experts say they are worried about the possibility.

    The failure at the plant in Fukushima Prefecture was caused by a power loss, and then a loss of backup power, following the massive earthquake and tsunami Friday.

    A Japanese official said a buildup of hydrogen in the reactor's cooling system caused the explosion, but he said the containment structure was intact.  Radiation was released, but government officials say the levels were low and are dropping.

    Watch the explosion at reactor number one in Fukushima

    Saturday, residents within 20 kilometers of the plant were evacuated, while government officials said there is no danger of a melt-down and large-scale radiation release, like the one at Chernobyl, Ukraine, in 1986 that sent radioactive clouds billowing across Europe.

    The four American experts and a colleague in Japan briefed reporters by telephone Saturday, and they said  they were less certain.  

    Nuclear energy analyst Robert Alvarez of the Institute for Policy Studies says there are many things we do not know about the failure, including whether the containment structure is fully intact. "The information that has been made public, particularly by the Japanese nuclear safety authorities, certainly indicate that radioactive elements from the fuel itself have escaped and entered the environment.  And even if the reactor maintains its integrity, there's a possibility that things like open relief valves on the top of the reactor and things like that may still release large amounts of radioactivity," he said.

    Ken Bergeron, a physicist who formerly worked for Sandia National Laboratories, says a so-called station blackout - which involves the loss of both off-site electricity and on-site backup power from diesel generators - is viewed in the nuclear industry as extremely unlikely.  But he says it happened.

    "So we're in uncharted territory.  We're in the land where probability says we shouldn't be.  And we're hoping that all of the barriers to release of radioactivity will not fail," he said.

    He said the first barrier, the so-called fuel cladding that covers the reactor rods, has apparently failed, which he says is shown by the release of radiation into the atmosphere.  

    Crews are pumping a mixture of seawater and boron to cool the reactor, and these experts say it is essential to keep the water flowing for several days.  Analyst Alvarez called the use of seawater a "Hail Mary pass", a term from American football meaning an act of desperation.  But he said that with enough water pumped at sufficient volume and rate, the reactor can be stabilized.

    Ken Bergeron said it is also crucial to restore electric power in order to pump enough water.

    Ira Helfand of the group Physicians for Social Responsibility says the reactor contains huge levels of  radioactivity that cannot be allowed to escape. "The bottom line is that we just don't know what's going to happen over the next couple of days. And frankly, neither do the people who are operating these power plants.  They're very complex systems that are clearly way out of whack, and whether they're going to be able to contain the radiation inside the reactors or not, is simply not known at this point," he said.

    Japanese health officials have announced they will distribute iodine tablets as a precaution.  Iodine is know to protect against radiation-induced thyroid cancer.

    You May Like

    Video Rubio Looks to Surge in New Hampshire

    Republican presidential candidate has moved into second place in several recent surveys and appears to be gaining ground on longtime frontrunner Donald Trump

    UN Calls for Global Ban on Female Genital Mutilation

    Recent UNICEF report finds at least 200 million girls and women alive today have undergone female genital mutilation in 30 countries

    UN Pilots New Peace Approach in CAR

    Approach launched in northern town of Kaga Bandoro, where former combatants of mainly Muslim Seleka armed group and Christian and animist anti-Balaka movement are being paid to do community work

    This forum has been closed.
    Comments
         
    There are no comments in this forum. Be first and add one

    Featured Videos

    Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
    German Artists to Memorialize Refugees With Life Jacket Exhibiti
    X
    Hamada Elsaram
    February 05, 2016 4:30 PM
    Sold in every kind of shop in some Turkish port towns, life jackets have become a symbol of the refugee crisis that brought a million people to Europe in 2015.  On the shores of Lesbos, Greece, German artists collect discarded life jackets as they prepare an art installation they plan to display in Germany.  For VOA, Hamada Elrasam has this report from Lesbos, Greece.
    Video

    Video German Artists to Memorialize Refugees With Life Jacket Exhibit

    Sold in every kind of shop in some Turkish port towns, life jackets have become a symbol of the refugee crisis that brought a million people to Europe in 2015.  On the shores of Lesbos, Greece, German artists collect discarded life jackets as they prepare an art installation they plan to display in Germany.  For VOA, Hamada Elrasam has this report from Lesbos, Greece.
    Video

    Video E-readers Help Ease Africa's Book Shortage

    Millions of people in Africa can't read, and there's a chronic shortage of books. A non-profit organization called Worldreader is trying to help change all that one e-reader at a time. VOA’s Deborah Block tells us about a girls' school in Nairobi, Kenya where Worldreader is making a difference.
    Video

    Video Genius Lets World Share Its Knowledge

    Inspired by crowdsourcing companies like Wikipedia, Genius allows anyone to edit anything on the web, using its web annotation tool
    Video

    Video Former Drug CEO Martin Shkreli Angers US Lawmakers

    A former U.S. pharmaceutical business executive has angered lawmakers by refusing to explain why he raised the price of a life-saving pill by 5,000 percent. Martin Shkreli was removed from a congressional hearing on Thursday after citing his Fifth Amendment right to stay silent. Zlatica Hoke has more.
    Video

    Video Super Bowl TV Commercials are Super Business for Advertisers

    The Super Bowl, the championship clash between the two top teams in American Football, is the most-watched sporting event of the year, and advertisers are lining up and paying big bucks to get their commercials on the air. In fact, the TV commercials during the Super Bowl have become one of the most anticipated and popular features of the event. VOA's Brian Allen has a sneak peek of what you can expect to see when the big game goes to commercial break, and the real entertainment begins.
    Video

    Video In Philippines, Mixed Feelings About Greater US Military Presence

    In the Philippines, some who will be directly affected by a recent Supreme Court decision clearing the way for more United States troop visits are having mixed reactions.  The increased rotations come at a time when the Philippines is trying to build up its military in the face of growing maritime assertiveness from China.  From Bahile, Palawan on the coast of the South China Sea, Simone Orendain has this story.
    Video

    Video Microcephaly's Connection to Zika: Guilty Until Proven Innocent

    The Zika virus rarely causes problems for the people who get it, but it seems to be having a devastating impact on babies whose mothers are infected with Zika. VOA's Carol Pearson has more.
    Video

    Video Solar Innovation Provides Cheap, Clean Energy to Kenya Residents

    In Kenya, a company called M-Kopa Solar is providing clean energy to more than 300,000 homes across East Africa by allowing customers to "pay-as-you-go" via their cell phones. As Lenny Ruvaga reports from Kangemi, customers pay a small deposit for a solar unit and then pay less than a dollar a day to get clean energy to light up their homes or businesses.
    Video

    Video Stunning Artworks Attract Record Crowds, Thanks to Social Media

    A new exhibit at the oldest art museum in America is shattering attendance records. Thousands of visitors are lining up to see nine giant works of art that have gotten a much-deserved shot of viral marketing. The 150-year-old Smithsonian American Art Museum has never had a response quite like this. VOA's Julie Taboh reports.
    Video

    Video Apprenticeships Put Americans on Path Back to Work

    Trying to get more people into the U.S. workforce, the Obama administration last year announced $175 million in grants towards apprenticeship programs. VOA White House correspondent Aru Pande went inside one training center outside of Washington that has gained national recognition for helping put people on the path to employment.
    Video

    Video New Material May Reduce Concussion Effects

    As the 2016 National Football League season reaches its summit at the Super Bowl this coming Sunday (2/7), scientists are trying to learn how to more effectively protect football players from dangerous and damaging concussions. Researchers at Cardiff and Cambridge Universities say their origami-based material may solve the problem. VOA’s George Putic reports.
    Video

    Video Saudi Arabian Women's Sports Chip Away at Stereotypes

    Saudi Arabian female athletes say that sports are on the front line of busting traditions that quash women’s voices, both locally and internationally. In their hometown of Jeddah, a group of basketball players say that by connecting sports to health issues, they are encouraging women and girls to get out of their homes and participate in public life. VOA’s Heather Murdock reports.
    Video

    Video A Year Later, Fortunes Mixed for Syrians Forging New Lives in Berlin

    In April of last year, VOA followed the progress of six young Syrian refugees -- four brothers and their two friends -- as they made their way from Libya to Italy by boat, and eventually to Germany. Reporter Henry Ridgwell caught up with the refugees again in Berlin, as they struggle to forge new lives amid the turmoil of Europe's refugee crisis.
    Video

    Video Zika Virus May be Hard to Stop

    With the Zika virus spreading rapidly, the World Health Organization Monday declared Zika a global health emergency. As Alberto Pimienta reports, for many governments and experts, the worst is yet to come.