Tag Archives: Tsunami

Fukushima’s ground zero: No place for man or robot

(Reuters) – The robots sent in to find highly radioactive fuel at Fukushima’s nuclear reactors have “died”; a subterranean “ice wall” around the crippled plant meant to stop groundwater from becoming contaminated has yet to be finished. And authorities still don’t know how to dispose of highly radioactive water stored in an ever mounting number of tanks around the site.

Five years ago, one of the worst earthquakes in history triggered a 10-metre high tsunami that crashed into the Fukushima Daiichi nuclear power station causing multiple meltdowns. Nearly 19,000 people were killed or left missing and 160,000 lost their homes and livelihoods.

Today, the radiation at the Fukushima plant is still so powerful it has proven impossible to get into its bowels to find and remove the extremely dangerous blobs of melted fuel rods.

The plant’s operator, Tokyo Electric Power Co (Tepco), has made some progress, such as removing hundreds of spent fuel roads in one damaged building. But the technology needed to establish the location of the melted fuel rods in the other three reactors at the plant has not been developed.

“It is extremely difficult to access the inside of the nuclear plant,” Naohiro Masuda, Tepco’s head of decommissioning said in an interview. “The biggest obstacle is the radiation.”

The fuel rods melted through their containment vessels in the reactors, and no one knows exactly where they are now. This part of the plant is so dangerous to humans, Tepco has been developing robots, which can swim under water and negotiate obstacles in damaged tunnels and piping to search for the melted fuel rods.

But as soon as they get close to the reactors, the radiation destroys their wiring and renders them useless, causing long delays, Masuda said.

Each robot has to be custom-built for each building.“It takes two years to develop a single-function robot,” Masuda said.

IRRADIATED WATER

Tepco, which was fiercely criticized for its handling of the disaster, says conditions at the Fukushima power station, site of the worst nuclear disaster since Chernobyl in Ukraine 30 years ago, have improved dramatically. Radiation levels in many places at the site are now as low as those in Tokyo.

More than 8,000 workers are at the plant at any one time, according to officials on a recent tour. Traffic is constant as they spread across the site, removing debris, building storage tanks, laying piping and preparing to dismantle parts of the plant.

Much of the work involves pumping a steady torrent of water into the wrecked and highly radiated reactors to cool them down. Afterward, the radiated water is then pumped out of the plant and stored in tanks that are proliferating around the site.

What to do with the nearly million tonnes of radioactive water is one of the biggest challenges, said Akira Ono, the site manager. Ono said he is “deeply worried” the storage tanks will leak radioactive water in the sea – as they have done several times before – prompting strong criticism for the government.

The utility has so far failed to get the backing of local fishermen to release water it has treated into the ocean.

Ono estimates that Tepco has completed around 10 percent of the work to clear the site up – the decommissioning process could take 30 to 40 years. But until the company locates the fuel, it won’t be able to assess progress and final costs, experts say.

The much touted use of X-ray like muon rays has yielded little information about the location of the melted fuel and the last robot inserted into one of the reactors sent only grainy images before breaking down.

ICE WALL

Tepco is building the world’s biggest ice wall to keep  groundwater from flowing into the basements of the damaged reactors and getting contaminated.

First suggested in 2013 and strongly backed by the government, the wall was completed in February, after months of delays and questions surrounding its effectiveness. Later this year, Tepco plans to pump water into the wall – which looks a bit like the piping behind a refrigerator – to start the freezing process.

Stopping the ground water intrusion into the plant is critical, said Arnie Gunderson, a former nuclear engineer.

“The reactors continue to bleed radiation into the ground water and thence into the Pacific Ocean,” Gunderson said. “When Tepco finally stops the groundwater, that will be the end of the beginning.”

While he would not rule out the possibility that small amounts of radiation are reaching the ocean, Masuda, the head of decommissioning, said the leaks have ended after the company built a wall along the shoreline near the reactors whose depth goes to below the seabed.

“I am not about to say that it is absolutely zero, but because of this wall the amount of release has dramatically dropped,” he said.

(Story corrects spelling of names in fifth paragraph to …Naohiro… not Naohero, in twelfth paragraph to Akira… not Akiro, in fourth-last paragraph to Arnie… not Artie, adds dropped word in first paragraph.)

(Reporting by Aaron Sheldrick and Minami Funakoshi Editing by Bill Tarrant)

Pain lingers five years later as tsunami-hit Japan town rises from ruins

RIKUZENTAKATA, Japan (Reuters) – Time has done little to help Japanese volunteer fireman Eiki Kumagai with memories of March 11, 2011, when he clung to some steps as a huge black tsunami surged through his town, washing away people he knew as they cried for help.

“We were recovering bodies,” the 48-year-old recalls. “This is a small town, we knew them all. Women, children, old people. There were so many, we had two layers.”

Five years after Rikuzentakata lost 7 percent of its population and its entire downtown to the 49-foot wave touched off by a magnitude 9 earthquake, a huge construction project has raised its center from future waves.

But while the physical landscape has been changed for the better, emotionally many people in the town of 20,000 remain frozen in grief and psychologists say it may take several generations to ease the trauma fully.

“The year of the tsunami, I was angry at the wave,” said Kazuo Sato, a former oyster fisherman who can still barely look at the sea. He lost 100 friends and relatives.

“What’s left is regret, and that’s getting worse. We could have saved so many more people.”

The town center has been transformed with 5 million cubic tonnes of earth scraped from a nearby mountain and shaped by a fleet of backhoes into mounds up to 46 feet high.

Cranes loom over a towering seawall and new roads snake over the hills.

Home building will finally start this summer, offering hope for 1,400 households still in barracks-like temporary housing.

Officials, including Mayor Futoshi Toba, deplore regulations that delayed construction and worry that with the passing of time, attention will be diverted from a recovery only 60 percent complete. National funds for rebuilding will dip with the new fiscal year from April.

Many also worry that construction for the 2020 Summer Olympics in Tokyo will hamper the rebuilding of the town.

“If construction overlaps, there won’t be enough workers and wages will rise, making houses more expensive,” said Toba, who watched helplessly from the city hall roof as the town was destroyed. His wife, with whom he had spoken moments before the quake, was killed.

“Why did the government want the Olympics in 2020? I think they could easily have hosted them four years later.”

SPRING SNOW

Some residents say the new embankments are uncomfortable reminders of how much their lives have changed.

“I think probably a lot of people have complicated feelings,” said city official Tsuyoshi Yamada. “But their feelings of wanting to live in a safe place are stronger.”

Long-suppressed feelings of anguish are emerging as life slips back into routines, but a stigma against mental illness in Japan makes many people reluctant to seek help.

“They keep their feelings shut tight in their chests out of a sense that others have suffered even more,” said psychologist Kiyoka Yukimoto. “For this city to really recover, they need mental health services.”

Volunteer firemen, who took to the streets telling people to flee as the water loomed, have particularly painful memories. One man began weeping as he recalled 51 colleagues who lost their lives.

“A couple of guys went down to check on an elderly man, even though I said we had no more time. None of them came back,” Kumagai said.

Toba, whose duties kept him from searching for his wife or seeing his children after the quake, said feelings were complex.

“It always snows around 3/11, even though it should be spring. But the weather reminds us of that day and everybody remembers those who died,” he said.

“At the same time, it is five years, so we shouldn’t just talk about gloomy things. We need to look forward and build a place where children can talk about their dreams.”

(Reporting by Elaine Lies; Editing by Linda Sieg, Robert Birsel)

Massive Quake Shakes Chile’s Capital

At least 8 people are dead and a million people have been displaced because of a massive magnitude 8.3 earthquake in Chile.

Violent aftershocks continue to shake the ground around Santiago and surrounding towns.  Residents were preparing for the possibility of a second strong quake although the tsunami warnings have ended for the region.

The U.S. Geological Survey (USGS) says the quake struck around 6:45 p.m., 29 miles west of the capital in a small city of Illapel.  The USGS reported the quake was the strongest to hit the region in 100 years.

Aftershocks of 6.3 and 6.4 have been recorded by the USGS.  A tsunami watch was issued for both California and Hawaii because of the quakes, although they were later retracted.  Residents are still being warned to watch for high waves and significant rip tides.

Chile is one of the most earthquake-prone countries in the world because of two major plates connecting just off the coastline.  The strongest recorded quake in world history took place in the nation in 1960, magnitude 9.5.

The Chile Earthquake’s First Tsunami Waves Strike

A TIDE GAUGE off the shore of Coquimbo, a Chilean seaside city less than 100 miles from the epicenter of tonight’s 8.3 moment magnitude earthquake, has logged wave heights in excess of 14 feet. This comes about 90 minutes after the quake struck at 7:54pm local time.

NOAA’s Pacific Tsunami Warning Center has predicted wave heights exceeding 36 feet along the Chilean coast, and smaller events elsewhere in the Pacific. Outside of Chile, French Polynesia, a group of over 100 islands in the middle of the south Pacific, is in the most danger. There, NOAA warns of tsunami waves from three to nine feet.

Source: Wired – The Chile Earthquake’s First Tsunami Waves Strike

Tsunami alert as Chile hit by powerful earthquake

A powerful earthquake has hit central Chile, causing buildings to sway in the capital Santiago, officials say.

The 8.3-magnitude tremor was centred off the coast, about 144 miles (232km) north-west of the capital.

The Pacific Tsunami Warning Center warned that “widespread hazardous tsunami waves are possible”.

One person was killed by a falling wall, and evacuation was ordered in coastal areas. Tsunami sirens were heard in the port of Valparaiso.

Chilean officials say the earthquake has produced waves of up to 4.5 metres (15 feet) along the coast in the region of Coquimbo.

Source: BBC News – Tsunami alert as Chile hit by powerful earthquake

Kick ‘em Jenny Putting Ships at Risk

An underwater volcano off the Granada coast is causing a threat to the shipping industry for the island.

Kick ‘em Jenny is off the country’s northern coast.  The threat level of the volcano currently sits at yellow after spending the weekend at the higher orange level.  The yellow threat level means that an eruption of the underwater volcano is possible and that ships should avoid the area of the volcano by a minimum of 1.5 kilometers.

The volcano, despite being 600 feet below the ocean surface, is a threat because a burst of gasses from the volcano could instantly sink a ship in the waters above.  The process, called “degassing”, would make ships suddenly lose their buoyancy and sink.

Plus, hot rocks can shoot out of the water like missiles and endanger other ships in the region.  It could also cause a tsunami depending on the strength of the eruption.

The volcano has erupted a dozen times since being discovered in 1939.  The last major eruption was in 2001.  The volcano is blamed for Grenada’s worst maritime disaster when 60 people died after a ship went right into the ocean over the volcano.

The volcano has been causing hundreds of small earthquakes over the last few weeks.  At one point on Thursday, over 150 quakes were recorded in four-hour period around the volcano.

Earthquake Strikes Off Papua New Guinea

A powerful earthquake struck Papua New Guinea on Tuesday morning generating a small tsunami near the epicenter.

Officials with the Geophysical Observatory in Port Moresby said that the tsunami was 3 feet high and struck in the harbor of Rabaul.  The tsunami caused no flooding and it did not pass the level of the high tide.

The magnitude 7.5 quake struck around 1:45 a.m. local time.

The quake happened along the tectonic plate under Australia and its overriding Pacific plates.  The quake has been preceded by a series of quakes along the fault line that started with a magnitude 7.5 quake on March 29, 2015.

Local officials say there was no widespread damage because of the quake but power lines were brought down in the area of Rabaul.  In Kokopo, buildings were reported with cracks in the walls and other structural damage but there were no reports of injuries.

The quake site is along the Pacific Ring of Fire.

Small Tsunami Generated After Pacific Earthquake

A huge earthquake off the coast of Papua New Guinea generated a small tsunami.

The magnitude 7.7 earthquake struck around 30 miles southeast of Kokopo at a depth of 40 miles. The Pacific Tsunami Warning Center warned of a potential 3 foot high tsunami but the highest reported wave was 1.5 feet in the harbor of Rabaul.

Rabaul residents say there was no major damage and most of the water flooded parking lots near the beach or seaside. Store owners say that items were knocked off shelves but there was no structural damage.

Residents say the tremor lasted about five minutes and was so intense that residents fled into the streets from fear of building collapse.

Miraculously, officials say there were no reports or deaths or injuries from the massive quake.

Papua New Guinea lies on the Pacific “Ring of Fire”. Volcanic and earthquake activity is common in the region.

Japanese Quake Causes Small Tsunami

A major earthquake struck off the coast of Japan early Tuesday causing a small tsunami.

The 6.9 magnitude quake struck around 6 a.m. local time, 6.2 miles deep and 52 miles east-northeast of Miyako, Japan.

The quake did not initially cause a tsunami warning from the Pacific Tsunami Warning Center and an advisory from the Japan Meteorological Agency was quickly cancelled.  However, residents of Iwate Prefecture reported a tsunami of about three feet in height.

No significant damage was reported as a result of the small tsunami.

Iwate Prefecture is a rural area with a total population around 1.3 million.  A nuclear power plant in the region reportedly had no damage.   Local train lines have suspended operations until the tracks can be examined for damage.

The location of the quake was on the Pacific Ring of Fire.

6.0 Magnitude Earthquake Shakes Philippines

The capital of the Philippines was rocked Saturday by a 6.0 earthquake that struck in the early hours of the morning.

The Philippine Institute of Volcanology and Seismology said the quake was centered 27 miles southwest of San Antonio, Zambales at 3:31 a.m.

A reporter for the Philippine Daily Inquirer said the quake was so strong it shook him and his son out of bed.

“The bed shook, the speaker fell and dogs barked,” Dennis Eroa wrote.  “That was the first time I experienced that kind of quake here in Olongapo.”

Officials reported only minor structural damage throughout the region.

Seismologists say that the residents of the area were lucky that the quake struck so far underneath the sea bed that a tsunami was not created and damage on land would be minimal.