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Since Japan, a key U.S. ally, had already started its own nuclear power generation program, Washington did not hesitate to seek Tokyo's backing for its request. It was apparent that the United States constructed nuclear reactors without having decided on disposal methods, forcing it to consider dumping them at sea after they were decommissioned.

Japan did not offer a clear answer when it was approached by the United States on the issue. Eventually, however, Washington succeeded in incorporating the clause into the treaty. In 1972, the United States was already dismantling early-stage nuclear reactors that had been used for testing. However, the disposal method of large-scale nuclear reactors for commercial purposes had not been decided although it was an issue that could not be shelved indefinitely.

The official noted that any attempt to bury the reactors on land would invite a public backlash. He also pointed to the financial difficulty of scientifically processing the reactors until the risk of radioactive contamination was totally eliminated. Then, the official said the only other option was to dump them at sea, and asked Japan for cooperation.

According to Kumao Kaneko, now aged 74 and then a member of the Foreign Ministry team involved in the negotiations, Japan did not take specific steps to assist the United States in this delicate matter. Eventually, during the general meeting of countries for the London Convention, the United States proposed incorporating a clause that would enable it to dump nuclear reactors at sea in exceptional cases in which all other means of disposal presented a risk to human health.

When presenting the proposal, the United States made no mention of its intention to dump its nuclear reactors at sea far into the future. The proposal was accepted. In the early 1970s, sea pollution was a huge international issue. Against that backdrop, countries worked feverishly to put the finishing touches on the London Convention. The treaty designated high-level radioactive substances as well as other materials, including mercury and cadmium, as waste whose dumping at sea is prohibited.

In 1993 revisions to the London Convention, the dumping of radioactive waste at sea was totally prohibited. However, the clause that approved of dumping in exceptional cases remained. For this reason, under the London Convention, it is possible for member countries of the treaty to dump radioactive waste at sea if they obtain the OK from the other parties as well as the International Atomic Energy Agency. According to the IAEA, the United States has not dumped radioactive waste at sea since 1970. Instead, it buries decommissioned nuclear reactors underground.

"We are aware of the need to show our policy," a NISA official said. However, the agency does not appear to be close to deciding on where the contaminated waste will end up.

That delay has led to the secrecy among municipal officials. "It would be difficult to gain the consent of residents when we try to secure a waste disposal site," a Fukushima municipal official said. "The national government does not mention anything about how we can specifically cope with the situation under such circumstances." The situation is expected to worsen.

9. The Mediterranean

For years, there have been allegations that the ‘Ndrangheta syndicate of the Italian mafia has been using the seas as a convenient location in which to dump hazardous waste — including radioactive waste — charging for the service and pocketing the profits. An Italian NGO, Legambiente, suspects that about 40 ships loaded with toxic and radioactive waste have disappeared in Mediterranean waters since 1994. If true, these allegations paint a worrying picture of an unknown amount of nuclear waste in the Mediterranean whose true danger will only become clear when the hundreds of barrels degrade or somehow otherwise break open. The beauty of the Mediterranean Sea may well be concealing an environmental catastrophe in the making.

8. The Somalian Coast

The Italian mafia organization just mentioned has not just stayed in its own region when it comes to this sinister business. There are also allegations that Somalian waters and soil, unprotected by government, have been used for the sinking or burial of nuclear waste and toxic metals — including 600 barrels of toxic and nuclear waste, as well as radioactive hospital waste. Indeed, the United Nations’ Environment Program believes that the rusting barrels of waste washed up on the Somalian coastline during the 2004 Tsunami were dumped as far back as the 1990s. The country is already an anarchic wasteland, and the effects of this waste on the impoverished population could be as bad if not worse than what they have already experienced.

7. Mayak, Russia

3. Mailuu-Suu, Kyrgyzstan

6. Sellafield, UK

Located on the west coast of England, Sellafield was originally a plutonium production facility for nuclear bombs, but then moved into commercial territory. Since the start of its operation, hundreds of accidents have occurred at the plant, and around two thirds of the buildings themselves are now classified as nuclear waste. The plant releases some 8 million liters of contaminated waste into the sea on a daily basis, making the Irish Sea the most radioactive sea in the world. England is known for its green fields and rolling landscapes, but nestled in the heart of this industrialized nation is a toxic, accident-prone facility, spewing dangerous waste into the oceans of the world.

5. Siberian Chemical Combine, Russia

Mayak is not the only contaminated site in Russia; Siberia is home to a chemical facility that contains over four decades' worth of nuclear waste. Liquid waste is stored in uncovered pools and poorly maintained containers hold over 125,000 tons of solid waste, while underground storage has the potential to leak to groundwater. Wind and rain have spread the contamination to wildlife and the surrounding area. And various minor accidents have led to plutonium going missing and explosions spreading radiation. While the snowy landscape may look pristine and immaculate, the facts make clear the true level of pollution to be found here

4. The Polygon, Kazakhstan

Once the location for the Soviet Union’s nuclear weapons testing, this area is now part of modern-day Kazakhstan. The site was earmarked for the Soviet atomic bomb project due to its “uninhabited” status — despite the fact that 700,000 people lived in the area. The facility was where the USSR detonated its first nuclear bomb and is the record-holder for the place with the largest concentration of nuclear explosions in the world: 456 tests over 40 years from 1949 to 1989. While the testing carried out at the facility — and its impact in terms of radiation exposure — were kept under wraps by the Soviets until the facility closed in 1991, scientists estimate that 200,000 people have had their health directly affected by the radiation. The desire to destroy foreign nations has led to the specter of nuclear contamination hanging over the heads of those who were once citizens of the USSR.

The industrial complex of Mayak, in Russia's north-east, has had a nuclear plant for decades, and in 1957 was the site of one of the world’s worst nuclear accidents. Up to 100 tons of radioactive waste were released by an explosion, contaminating a massive area. The explosion was kept under wraps until the 1980s. Starting in the 1950s, waste from the plant was dumped in the surrounding area and into Lake Karachay. This has led to contamination of the water supply that thousands rely on daily. Experts believe that Karachay may be the most radioactive place in the world, and over 400,000 people have been exposed to radiation from the plant as a result of the various serious incidents that have occurred — including fires and deadly dust storms. The natural beauty of Lake Karachay belies its deadly pollutants, with the radiation levels where radioactive waste flows into its waters enough to give a man a fatal dose within an hour.

Considered one of the top ten most polluted sites on Earth by the 2006 Blacksmith Institute report, the radiation at Mailuu-Suu comes not from nuclear bombs or power plants, but from mining for the materials needed in the processes they entail. The area was home to a uranium mining and processing facility and is now left with 36 dumps of uranium waste — over 1.96 million cubic meters. The region is also prone to seismic activity, and any disruption of the containment could expose the material or cause some of the waste to fall into rivers, contaminating water used by hundreds of thousands of people. These people may not ever suffer the perils of nuclear attack, but nonetheless they have good reason to live in fear of radioactive fallout every time the earth shakes.

2. Chernobyl, Ukraine

Home to one of the world’s worst and most infamous nuclear accidents, Chernobyl is still heavily contaminated, despite the fact that a small number of people are now allowed into the area for a limited amount of time. The notorious accident caused over 6 million people to be exposed to radiation, and estimates as to the number of deaths that will eventually occur due to the Chernobyl accident range from 4,000 to as high as 93,000. The accident released 100 times more radiation than the Nagasaki and Hiroshima bombs. Belarus absorbed 70 percent of the radiation, and its citizens have been dealing with increased cancer incidence ever since. Even today, the word Chernobyl conjures up horrifying images of human suffering.

1. Fukushima, Japan

The 2011 earthquake and tsunami was a tragedy that destroyed homes and lives, but the effects of the Fukushima nuclear power plant may be the most long-lasting danger. The worst nuclear accident since Chernobyl, the incident caused meltdown of three of the six reactors, leaking radiation into the surrounding area and the sea, such that radiative material has been detected as far as 200 miles from the plant. As the incident and its ramifications are still unfolding, the true scale of the environmental impact is still unknown. The world may still be feeling the effects of this disaster for generations to come.

In the disaster-affected areas in Tohoku, the amount of debris from tsunami is simply too huge for the affected municipalities to process by themselves. The national government has requested the prefectures and municipalities not affected by the disaster to take the debris and process. Responding to the request, the Tokyo Metropolitan government has decided to accept the debris from Iwate Prefecture for 2 and a half years till March 2014, and will sign an agreement with the Iwate prefectural government on September 30.

As to the "safe" level of burying the radioactive ashes and debris, that's totally meaningless now that the Ministry of Environment has allowed the burial of just about anything, even the ashes that measures over 100,000 becquerels/kg of cesium, as long as there are measures in place at the processing facilities that will prevent the leakage.

According to the government, the density of radioactive materials measured on the debris and in the ashes from burning the debris in Miyako City was lower than the national standard to allow burying. Outside Tohoku, Tokyo will be the first to accept the disaster debris from Tohoku. The Tokyo government plans to accept the total of about 500,000 tonnes of debris. The Metropolitan bureau of environment says "We want to contribute to the recovery and rebuilding of the disaster-affected areas".

The landfill beyond Aomi, Koto-ku is the same one in the Tokyo Bay that the Tokyo Metropolitan government has been dumping the radioactive ashes since May. (See my 9/13/2011 post.)

The Tokyo Metropolitan government will conduct public bidding to decide which contractors will get to process (incinerate) the disaster debris before starting to accept debris from Miyako City in Iwate Prefecture starting next month. The debris will arrive in Tokyo in containers by rail. Radioactive materials will be measured when the debris are shipped, and when they are burned. After incineration, the ashes will be buried in the landfill beyond Aomi in Koto-ku.

Apparently, when the Tokyo Metropolitan government answered questions from the Tokyo Metropolitan Assembly on September 28, it was already a done deal. Assemblyman Hirofumi Yanagase, who has been active in alerting the citizens about dangerous radiation levels at sludge plants and waste incinerators in his district in Tokyo, fumes (link is in Japanese):"The government said during the question and answer session in the Assembly on September 28 that the details were still being worked out. But then less than half a day later they announced a concrete plan of accepting 1,000 tonnes of debris from Iwate Prefecture by the middle of November."

NHK also reports that the Tokyo will launch the campaign to invite the 2020 Summer Olympics to Tokyo but with the reduced budget, after the lavish and unsuccessful campaign by Governor Ishihara the last time (for 2016) was heavily criticized. Now Isihara says he will only use 7 billion yen (US$91.5 million) of taxpayers' money instead of 14 billion yen he spent the last time.

Oh and the national government now wants Tokyo and 7 other Prefectures in Kanto and Tohoku (Fukushima, Miyagi, Iwate, Ibaraki, Tochigi, Gunma, Chiba) to build intermediate storage facilities of highly contaminated soil in their own prefectures, according to Yomiuri Shinbun (9/28/2011). Half of Tohoku and most of Kanto are to have a nuclear waste dump, and Tokyo wants to invite Olympics

TEPCO intentionally dumped radioactive materials into the ocean, as they had no additional room for storage, the levels showed no signs of decreasing, and all desalination hopes were falling woefully short.  It would also be found that many leaks around, and inside of the reactors were also finding their way into the Pacific, but the public was told that there would not be any risk to them, or the living creatures in the sea. After 7 months however, impact can be found all over the island nation, and spreading throughout the ocean, despite the expectations it would merely be diluted exponentially. In September, scientists from the government's Meteorological Research Institute and the Central Research Institute of the Electric Power Industry announced their findings at a meeting of the Geochemical Society of Japan, adding that some of the cesium will also flow into the Indian Ocean and, eventually, reach the Atlantic.

Floating Radioactive Debris Reaching Hawaii Sooner Than Expected The researchers believed that the cesium had initially dispersed into the Pacific from the coast of Fukushima Prefecture but would be taken to the southwest by the prevailing currents at a depth of around 1,300 feet. Researchers thought it would take years to reach the islands. But now, according to a University of Hawaii researchers, the debris will arrive sooner than expected.  ....Since the March 11th earthquake and tsunami, researchers have been predicting it would take about two years for the debris from Japan to hit Hawaii's west-facing beaches. “We have a rough estimate of 5 to 20 million tons of debris coming from Japan,” said UH computer programming researcher Jan Hafner.

..Their path back to Russia crossed exactly across the projected field of the debris.  Soon after passing the Midway Islands on Sept. 22, they hit the edge of the tsunami debris.   “They saw some pieces of furniture, some appliances, anything that can float, and they picked up a fishing boat,” said Hafner.  It was a 20-foot fishing boat with the word "Fukushima" on it.  “That's actually our first confirmed report of tsunami debris,” said Hafner...  Source: kitv.com 

The Public Concern Was Never Really An 'Official' concern In the first few days after the March 11 earthquake and tsunami that damaged the Fukushima Daiichi power plant, government authorities and the company were criticized for not providing information in a timely fashion. A Kyodo News survey released Sunday found that 58% of respondents did not approve of the government's handling of the crisis at the nuclear plant. More than two weeks later, updates provided via news conferences, press releases, data charts and Twitter feeds have become very frequent and very technical. To a lay person, the onslaught of numbers and unfamiliar terms can feel indecipherable.

Initially reports had quieted concerns by stating that the materials would be diluted so vastly that the radioactivity would not be able to accumulate, and would not affect the environment.  The experts claimed they would track the deposition and floating radioactive debris field making its way on a trans-Pacific trip to the United States. Apparently, the experts in Japan didn't get the message.  The Japanese regularly tested the seawater only for 'popular' Iodine and Cesium isotopes instead of all known fission-produced radioactive materials, for the first 3 months after the disaster.  By March 31st, radioactive contamination concentration was 4,385 times the legal limit, up from 3,355 times on Tuesday, according to Kyodo. In response, the government had pledged to increase radiation monitoring on land and by sea and to consider increasing the evacuation zone — however time has shown little action would follow these vows.

This ruse would only work, if the officials could hold off on monitoring and tracking the deposition as long as possible, until the plume had finally moved away from the coastline. TEPCO had intentionally dumped over 11 tons of water in the first few weeks, all of which contained high concentrations of radioactive materials. There would be further reports that would be difficult to quantify, including unknown amount of contaminated water leaked into the ocean from a damaged reservoir, and a plethora of uncharted and un-monitored leaks from the reactors. After dealing with the spring, the tsunami season arrived and even more contamination entered the sea through fallout from the air, and through precipitation runoff.

By March 26th, the news broke that levels near the reactor were 1,250 times the legal limits, as the levels of I-131 reported just a few hundred meters offshore boomed to ten times the already increased levels in a matter of days.  Tepco also reported levels of caesium-137 - which has a longer half life of about 30 years - almost 80 times the legal maximum. Findings throughout the summer challenged experts and officials however, as radiation levels found contamination in some parts had risen over 3,000 times the normal levels. "This is a relatively high level," nuclear safety agency official Hidehiko Nishiyama said in a televised news conference. Drinking 500ml of fresh water with the same concentration would expose a person to their annual safe dose, Mr Nishiyama said, but he ruled out an immediate threat to aquatic life and seafood safety.

"Generally speaking, radioactive material released into the sea will spread due to tides, so you need much more for seaweed and sea life to absorb it," Mr Nishiyama said. Pledges to Monitor and Track Contamination Left Unattended Japanese officials said they would check the seawater about 20 miles (30km) off the coast for radiation back in March, yet even though finding contamination, resumed testing withing 20 km, and downplayed the effects by stating they expected it to show there is no need to be concerned about any possible effect to fish.

By the time that current reaches the Central Pacific, there are branches heading more towards Alaska and the South—that gets harder to predict,” said Ken Buesseler, a senior scientist with the Woods Hole Oceanographic Institute told Jeff McMahon, a reporter for Forbes. “But that’s one of the things that several people hope to do by measuring these isotopes even at levels when they’re not harmful. We could actually track those ocean currents and better understand the circulation pattern in the Pacific.” Japanese Science and Fisheries Agencies Late Decision to Expand Testing On Marine Products to Weekly Testing 20-30 km Around Fukushima Daiichi

The science ministry and the Fisheries Agency will strengthen testing on marine products and widen the survey for seawater for radiation contamination from the damaged Fukushima No.1 nuclear power plant. The tests on marine products will be conducted once a week, in principle, depending on the size of the fish hauls, in Fukushima, Miyagi and Ibaraki prefectures. The government eased restrictions on land use outside the 20-kilometer no-entry zone around the plant in September. It will now test waters 20-30 km from the plant for radiation, and eventually survey seawater beyond 280 km from the coast using more accurate instruments, officials said.

Sources: ajw.asahi.com, via Nuclear News | What The Physics? Forbes.com SkyNews TEPCO IAEA