OCEANS & SEAS REPORTS
PACIFIC OCEAN / JAPAN
2015/12/07 at 3:40 pm
4th December 2015 – Fukushima Pacific Plume Reaches Predicted Levels
“Scientists monitoring the spread of radiation in the ocean from the Fukushima nuclear accident report finding an increased number of sites off the US West Coast showing signs of contamination from Fukushima. This includes the highest detected level to date from a sample collected about 1,600 miles west of San Francisco. The level of radioactive cesium isotopes in the sample, 11 Becquerel’s per cubic meter of seawater (about 264 gallons), is 50 percent higher than other samples collected along the West Coast so far,“
2015/09/14 at 5:24 pm
14th September 2015 – TEPCO releases first batch of decontaminated Fukushima groundwater to sea
TEPCO’s standard is set at 1 becquerel of radioactive cesium per liter of decontaminated groundwater, 3 becquerels for elements that emit beta rays and 1,500 becquerels for tritium–a substance which is very hard to treat.
As for now, the utility plans to pump 100 to 200 tons of groundwater daily, but will increase the volume to 500 tons if it does not encounter any problems with the decontamination facilities.
12th September 2015 – Bags of tainted waste swept into Fukushima river during torrential rain
FUKUSHIMA–Seven sites for radioactive waste generated from the Fukushima nuclear crisis were submerged during torrential rain in eastern Japan on Sept. 11, raising fears over a possible radiation spill into the environment.
Floodgates normally block tainted water from reaching the ocean from drainage ditches, but the torrential rains overwhelmed the gates twice in the pre-dawn hours of Sept. 9 and Sept. 11, the plant operator said.
20th June 2015 – 1,000,000 Bq/m3 of Sr-90 detected in seawater of Fukushima plant port / Highest in recorded history
The previous highest readings were lower than 700,000 Bq/m3.
21st May 2015 – Thirty years of unbroken monitoring on radioactivity in the Baltic Sea
Despite a general decreasing trend of concentrations of radionuclides, the Baltic Sea still is one of the most polluted sea areas as regards radioactive contamination.
Chart: Northern Baltic, Cesium becquerels per cubic meter, by year,
Note, in the chart the first two bars for years 1986 & 1987 should be much higher, they appear to indicated 294 Bq m-3 for 1986, and 196 Bq m-3 for 1987. This would have been just after the Chernobyl nuclear power plant accident, which occurred in 1986.
Thematic assessment of long-term changes in radioactivity in the Baltic Sea, 2007-2010
Submitted on 2014/01/03 at 6:17 pm
31st December 2013 – Nuclear Waste Sits on Ocean Floor U.S. Has Few Answers on How to Handle Atomic Waste It Dumped in the Sea.
From 1946 to 1970, federal records show, 55-gallon drums and other containers of nuclear waste were pitched into the Atlantic and Pacific at dozens of sites off California, Massachusetts and a handful of other states.
How many dump sites are there? Over the years, federal estimates have ranged from 29 to more than 60.
20th December 2013 – USS Calhoun County sailors dumped thousands of tons of radioactive waste into ocean.
For up to 15 years after World War II, the crew of Albernaz’s ship, the USS Calhoun County, dumped thousands of tons of radioactive waste into the Atlantic Ocean, often without heeding the simplest health precautions, according to Navy documents and Tampa Bay Times interviews with more than 50 former crewmen.
Not all of them sank. A few pushed back against the frothing ocean, bobbing in the waves like a drowning man. Then shots would ring out from a sailor with a rifle at the fantail. And the sea would claim the bullet-riddled drum.
9 May 2001 – Newly released documents indicate the Navy dumped far more nuclear waste than it’s ever acknowledged in a major commercial fishery just 30 miles west of San Francisco.
The Navy’s own documents, declassified at the request of SF Weekly, show that significant amounts of the nuclear bomb component plutonium, which has a half-life of 24,000 years, and similarly long-lived “mixed fission” products were used at the nuclear laboratory at Hunters Point.
An entire radioactive ship, the 10,000-ton aircraft carrier USS Independence, is believed to have been sunk in or near the waste site. The carrier itself was clearly “hot” when it went down. It had been used as an atomic bomb target and a nuclear laboratory, and it was packed full of fresh fission products and other radiological waste at the time it sank.
The simple truth is that no one can say with any degree of certainty whether the Farallon Islands Nuclear Waste Site and the fish taken there are safe, because no one has fully studied them.
Radionuclides in fishes and mussels from the Farallon Islands Nuclear Waste Dump Site, California.
August 1999 – This very detailed IAEA report provides a map on page 15-16 that shows all the known official dumps sites, up to the publication of the document. It then provides details of what was dumped at each individual dump site.
The maps provided with the article “Ocean Disposal of radioactive waste,“ on wikipedia show the dump site locations in more detail.
1989 – IAEA Ocean disposal of radioactive waste status report
Between these two dates, an estimated 63 PBq (1.7 MCi) of radioactive waste coming from research, medicine, and nuclear industry activities have been packaged, usually in metal drums lined with a concrete and bitumen matrix, and disposed of at sea.
20th November 1980 – A detailed EPA document on ocean dumping.