12th October 2014 – Tritium up 10-fold in Fukushima groundwater after Typhoon Phanfone
Some 150,000 becquerels of tritium per liter were measured in a groundwater sample taken Thursday from a well east of the No. 2 reactor. The figure is a record for the well and over 10 times the level measured the previous week.
In addition, materials that emit beta rays, such as strontium-90, which causes bone cancer, also shattered records with a reading of 1.2 million becquerels, the utility said of the sample.
The well is close to the plant’s port in the Pacific.
24th September 2014 – Researchers Find Radiation Hot Spots Off Coast Near Fukushima
Average cesium 137 concentrations in the sea floor were 90 bq/kg
Areas 4 km out to sea, 20 locations had concentrations of 1000 bq/kg
Areas 6 km out to sea had levels of 2000 bq/kg in some locations
This information was originally published in July 2014. While TEPCO has been publishing readings of cesium in the water near the plant that seem unusually low, the sea bed is another story. Long lived radioactivity doesn’t just go away, it moves somewhere else.
18th September 2014 – Fukushima radioactive contamination is rapidly warming North Pacific seawater.
There is a massive pool of warm water in the Gulf of Alaska, NOAA scientist Nate Mantua said in an email. It is unprecedented in the historical record, he added… the past year is way out of the historical range — “so who knows what will happen?”…
300,000 becquerels per cubic centimeter detected in ocean water is 300 BILLION becquerels per square meter. Fukushima has been leaking ever since, but the worst of it occurred at the beginning of the catastrophe.
The contaminated water will not move out for many years, but decay heat release will continue, so look for Pacific sea surface temperatures to keep increasing, and the drought to continue.
10th September 2014 – Japanese mass media “Jiji” rose in revolt against Tepco / 2 trillion Bq leaked to the sea in 10 months.
Japanese mass media, “Jiji” reported about 2 trillion Bq of Sr-90 and Cs-137 leaked to the Pacific only in 10 months.
2014/09/10 at 3:22 am
3rd April 2013 – Cesium, iodine and tritium in NW Pacific waters – a comparison of the Fukushima impact with global fallout
At the sampling site about 40 km from the coast, where all three radionuclides were analyzed, the Fukushima impact on the levels of these three radionuclides represents an increase above the global fallout background by factors of about 1000, 50 and 3, respectively. The water column data indicate that the transport of Fukushima-derived radionuclides downward to the depth of 300 m has already occurred.
The observed 137Cs levels in surface waters and in the water column are compared with predictions obtained from the ocean general circulation model, which indicates that the Kuroshio Current acts as a southern boundary for the transport of the radionuclides, which have been transported from the Fukushima coast eastward in the NW Pacific Ocean.
September 2013 – Ocean Plume Modeling for the Fukushima Dai’ichi Event: Particle tracing.
These particle tracing exercises show us: The Kuroshio (extension) and Oyashio are remarkably effective in localizing pollution on a relatively small section of the Japanese coast, while effectively dispersing pollutants eastward into the Pacific. l Coastal water may take several weeks to reach the Kuroshio extension. l Currents are strongest near Japan, particles slow down as they move eastward.
First weeks contamination 30km offshore is dominated by atmospheric deposits. Localized spikes in contamination after April 1 are likely due to coastal releases. Could be added as separate load to model.
2014/09/08 at 3:47 am
31st December 2013 – Nuclear Waste Sits on Ocean Floor
“I would beg to differ,” Thomas Suchanek, the principal investigator and lead author of the 1991 study, said recently. The study found americium, a radioactive decay product of plutonium, in some fish samples from the site as well as a comparison area about 60 miles away. The report calculated that plutonium in underwater sediment at the dump site was up to about 1,000 times normal background levels.
The Food and Drug Administration said that in 1990 it found traces of plutonium in fish samples from the site but at levels well within safety standards.
On various occasions, federal reports say, government researchers have encountered lobster fishermen or lobster traps inside the no-fishing advisory zone.
27th August 2014 – Scientist wants samples from islanders for testing for radioactivity
“The plume also contains other radioactive material, including Strontium 90 at a far, far lower level than was released into the atmosphere during the nuclear bomb testing up until the 1960s. As well, radioactive isotopes of iodine, low levels of plutonium and tritium (hydrogen 3) might be in the plume.”
“The plume also contains other radioactive material, including Strontium 90 at a far, far lower level than was released into the atmosphere during the nuclear bomb testing up until the 1960s.”
In my opinion this is a very misleading statement, because ocean life can greatly concentrate contaminants, through the dynamics of Bio-accumulation. Plant and animal life in the ocean can potentially Bio-accumulate radioactive isotope contamination through the food chain, by hundreds of thousand of times, and sometime millions of times.