- Global fallout of nuclear weapon tests — 2,566,087x1015 Bq.[4]
- 1986 Chernobyl disaster total release — 12,060x1015 Bq.[5]
- 2011 Fukushima Daiichi nuclear disaster, estimated total aerial release — 11,346x1015 Bq.[6]
- Fukishima Daiichi nuclear plant cooling water dumped (leaked) to the sea — TEPCO estimate 4.7x1015 Bq, Japanese Nuclear Safety Commission estimate 15x1015 Bq,[7] French Nuclear Safety Committee estimate 27x1015 Bq.[8]
- The US did not report tonnage or volume of 90,543 containers of radioactive waste dumped into seas, 1946-70.
UK0 35,088 0 35,088 1948–82 NE Atlantic 15 sites, ?? containers, 74,052 tons
and 18 sites off coast of British isles more than 9.4 TBq
Soviet Union38,369 0 874 39,243 1959–92[10] Arctic ; 20 sites, 222,000 m3 and reactor w or w/o spent fuel,
Pacific Ocean (mainly sea of Japan); 12 sites, 145,000 m3
| Waste type | Atlantic | Pacific Ocean | Arctic | total | note |
|---|---|---|---|---|---|
| Reactors with spent fuel | Nil | Nil | 36,876 | 36,876 |
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2-20-15 The 1986 Chernobyl disaster in Ukraine remains one of the worst nuclear incidents in history and highlighted the risks of generating power by splitting atoms. But it's not the only nuclear waste the Soviet Union left behind. Scattered across the ocean floor in the cold waters of the Arctic are nuclear submarines and reactors dumped by the Soviets up until the early 1990s.
https://news.vice.com/article/the-soviet-union-dumped-a-bunch-of-nuclear-submarines-reactors-and-containers-into-the-ocean
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5 Billion Bq of Strontium-90 flows to the Pacific on the daily basis in 2014. Tepco announced in the press conference of 8/25/2014.
This is due to the contaminated water overflowing from the seaside of Reactor 1 ~ 4 to Fukushima plant port. They also announced 2 Billion Bq of Cesium-137 and 1 Billion Bq of Tritium flow to the sea every single day as well. Fukushima plant port is not separated from the Pacific. Discharged nuclide naturally spreads to the sea. http://www.tepco.co.jp/tepconews/library/archive-j.html
http://fukushima-diary.com/2014/08/5-billion-bq-strontium-90-flows-sea-every-single-day/
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On 6/19/2015, Tepco announced they measured 1,000,000 Bq/m3 of Strontium-90 at two locations in Fukushima plant port.
This is the highest reading in recorded history. The sample is the port seawater. Sampling date was 5/4/2015. http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2015/images/2tb-east_15061901-j.pdf
http://fukushima-diary.com/2015/06/1000000-bqm3-of-sr-90-detected-in-seawater-of-fukushima-plant-port-highest-in-recorded-history/
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5-3-16 Prof. Aoyama from Institute of Environmental Radioactivity of Fukushima University reported that the radioactive material discharged from Fukushima plant circulated in the Pacific to come back to Japan offshore.
He implemented seawater analysis at 71 points from 11. 2015 to 2. 2016. The analysis is partially completed to show radioactive material has spread to the South West offshore of Japan. 2 Bq/m3 of Cs-137 was detected in seawater from South West offshore of Kyushu. 1.83 Bq/m3 was detected even offshore of the west coast of Japan. http://fukushima-diary.com/2016/05/radioactive-material-from-fukushima-plant-coming-back-to-japan-in-the-pacific/
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4-16-15 Prof. Aoyama from Fukushima University Institute of Environmental Radioactivity reported that 800 tera Bq (800,000,000,000,000 Bq) of Cesium-137 is going to reach West Coast of North America by 2016. The amount to reach of other nuclides such as Cs-134 and other nuclides are not officially announced. This is 5% of the total Cs-137 amount discharged to the Pacific.
http://anago.2ch.net/test/read.cgi/dqnplus/1429877329/ http://fukushima-diary.com/2015/04/fukushima-uni-800000000000000-bq-of-cs-137-to-reach-west-coast-of-north-america-by-2016/
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Between Aug 2013 and My 2014 the plant emitted 1.46 trillion becquerels’ worth of strontium-90 and 610 billion becquerels of cesium-137, totaling 2.07 trillion becquerels of radioactivity released into the ocean.
Between May 2011 and August 2013, 10 trillion becquerels of strontium-90 and 20 trillion becquerels of cesium-137 flowed into the bay, for a total of 30 trillion becquerels. https://www.globalresearch.ca/over-2-trillion-becquerels-of-radioactive-waste-flowed-from-fukushima-plant-into-pacific-in-just-10-months/5401946
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9-7-11 The total radioactive release from Fukushima is currently estimated at about 5.5% of Chernobyl, which spewed an incredible 1.4×1019Bq. http://blogs.nature.com/news/2011/09/directly_comparing_fukushima_t.html
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3-7-16 Buesseler and colleagues led by Universitat Autònoma of Barcelona, Spain have found that strontium is not decreasing as fast as cesium. Whereas there was approximately 40 times more cesium than strontium in the waters off Japan in 2011, by 2013, there was approximately 10 times more cesium than strontium. The concern lies in the thousands of tons of strontium still stored in tanks at the nuclear power plant and accumulated in buildings and soils, some of it still leaking into the ocean.
“We think that when there is heavy rain, more cesium, strontium, and other isotopes from the nuclear power plant are carried into the ocean,” says Buesseler. “We are still investigating how that occurs –whether carried in the groundwater or from the run off of sediment – but clearly it is highest near the contaminated site of the Fukushima nuclear power plants.” ...“Whereas it takes approximately two months for half of the radioactive cesium to flush out of fish, it takes more like two years for strontium to flush out of fish because it’s in their bones,” says Buesseler. “So if the supply of strontium to the ocean gets worse, it would take longer for the levels to decrease in seafood. ...The highest numbers the researchers have seen in the eastern Pacific are almost 10 Bq/m3, found some 1,500 miles north of Hawaii.
“If you were to swim in waters at this level the health effects, or dose, would be 1000 times less than a single dental x-ray. https://www.whoi.edu/news-release/fukushima-site-still-leaking
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