Early Study of Kelp In Pacific

This was an article from 2012.

Canopy-Forming Kelps as California’s Coastal Dosimeter:131I from Damaged Japanese Reactor Measured inMacrocystis pyrifera

 

The Fukushima Daiichi Nuclear Plant, damaged by an earthquake and tsunami on March 11, 2011 released large amounts of 131I into the atmosphere, which was assimilated into canopy blades of Macrocystis pyrifera sampled from coastal California. The specific activity calculated to the estimated date of deposition/assimilation ranged from 0.6 to 2.5 Bq gdwt–1, levels greater than those measured from kelps from Japan and Canada prior to the release. These 131I levels represent a significant input into the kelp forest ecosystem. Canopy-forming kelps are a natural coastal dosimeter that can measure the exposure of the coastal environment to131I and perhaps other radioisotopes released from nuclear accidents. An organizational mechanism should be in place to ensure that they are sampled immediately and continuously after such releases.

EneNews summarizes the data:

Corona Del Mar (Highest in Southern California)

  • 2.5 Bq/gdwt (gram dry weight)= 2,500 Bq/kg of dry seaweed

Santa Cruz (Highest in Central California)

  • 2.0 Bq/gdwt = 2,000 Bq/kg of dry seaweed

Simon Fraser University in Canada also tested North American seaweed after Fukushima:

  • “In samples of dehydrated seaweed taken on March 15 near the North Vancouver SeaBus terminal, the count was zero; on March 22 it was 310 Bq per kilogram; and by March 28 it was 380 Bq/kg.” -Vancouver Sun
  • Seaweed in Seattle also tested positive for iodine-131; levels were not reported -KIRO
  • No results after March 28 were reported

In addition, radioactive debris is starting to wash up on the Pacific Coast. And because the Japanese areburning radioactive materials instead of disposing of them, .

 

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Dulse Atlantic Canadian

FROM ADAM IN JAPANAtlantic Canadian Dulce Test
Sorry, I’ve been out of the loop for awhile. Anyway, I had promised to share the results of a testing I had done on Atlantic Dulse (Canadian) using a high-end Japanese spectrometer owned by a volunteer group. This detects Cesium down to 1bq/kg and all tests are for 10 hours. The test did come up positive for Cesium (2bq/kg) and it was attributed to Chernobyl due to the ratio of 137 vs 134. Apparently there was a fair amount of fallout in this area. My other tests of various Japanese foods and dirt, although mostly from Western Japan, have all turned up negative. Many of these items registered 50+ CPM, but it was due to potassium, which you can also see is high in the dulse.

Huge Numbers, Huge Lies

Tepco has been lying to us since 311 happened. I am particularly interested in watching the numbers of Bqs rise in Tritium and Strontium counts and noting how long Tepco knew about these numbers before they told us. The pattern is usually to allow at least 6 months to go by before putting out old numbers that are astronomically high. I don’t know why they do that; it is not as if others can do anything about it or as if those numbers can at this point make Fukushima appear worse than it is. How do you get worse than Hell? Fukushima is hell. Often times TEPCO will release these numbers 6 months late and then in another few months tell us that the numbers from earlier were also known to have been much higher than they said in the first place. It is a sick game. Very sadistic, I believe. Below is a recent example.

 

5,000,000,000 Bq/m3 of Strontium-90 measured from groundwater last July / Tepco not announced for half a year [URL]

 

On 5/28/2014, Tepco announced that they actually detected 1,000,000,000 Bq/m3 of Strontium-90 from groundwater 9 months ago. They also measured 580,000,000 ~ 890,000,000 Bq/m3 of Strontium-90 from another observing well 8 ~ 9 months ago.

 

The sampling location was the seaside of reactor2. It was known that extremely high level of radioactive material had been measured in groundwater of this area, but they didn’t announce Strontium-90 data.

The sampling date was September ~ October of 2013. It is highly likely that the contaminated water of this severe density of Strontium-90 has been leaking to the Pacific for at least 9 months continuously.

 

This summer, Fukushima prefectual government is going to open the swimming beach, and don’t even analyze the beach sand. Because contamination is not supposed to exist, they are not supposed to analyze. Because they don’t analyze, contamination is not supposed to exist.

(cf, Fukushima gov to open swimming beach / 94 Bq/Kg from sea floor, but don’t even check sand [URL 2])

Rock Fish from Fukushima

High level of radiation from fish 193,000 Bq/Kg of Cs-134/137 from fish in Fukushima plant port

Please open link for the charts. Right now these are only in Japanese. I am trying to get them translated into English. http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2014/images/fish01_140516-j.pdf

 

From Mochizuki
On 5/16/2014, Tepco announced they measured 193,000 Bq/Kg of Cesium-134/137 from Spotbelly rockfish. The fish was caught in Fukushima plant port this April.

Related to this article. Tepco discharged 561t of bypass contaminated groundwater to the Pacific [URL]

Extremely high level of radioactive material is still measured from fish in Fukushima plant port.

On 5/16/2014, Tepco announced they measured 193,000 Bq/Kg of Cesium-134/137 from Spotbelly rockfish. The fish was caught in Fukushima plant port this April.

The radioactive density is 1,930 times much as Japanese food safety limit.

Fukushima plant is releasing countless other nuclides such as Strontium-90 or Tritium, but these nuclides were not tested on this sample, which doesn’t mean “not detected”.

The bones and organs of fish were not analyzed either, and Tepco hasn’t made any explanation about why they don’t.

 

Rad doses and risk from Fukushima to Marine Biota and Human Consumption of Seafood

Evaluation of radiation doses and associated risk from the Fukushima nuclear accident to marine biota and human consumers of seafood

 

Abstract

Radioactive isotopes originating from the damaged Fukushima nuclear reactor in Japan following the earthquake and tsunami in March 2011 were found in resident marine animals and in migratory Pacific bluefin tuna (PBFT). Publication of this information resulted in a worldwide response that caused public anxiety and concern, although PBFT captured off California in August 2011 contained activity concentrations below those from naturally occurring radionuclides. To link the radioactivity to possible health impairments, we calculated doses, attributable to the Fukushima-derived and the naturally occurring radionuclides, to both the marine biota and human fish consumers. We showed that doses in all cases were dominated by the naturally occurring alpha-emitter 210Po and that Fukushima-derived doses were three to four orders of magnitude below 210Po-derived doses. Doses to marine biota were about two orders of magnitude below the lowest benchmark protection level proposed for ecosystems (10 µGy⋅h−1). The additional dose from Fukushima radionuclides to humans consuming tainted PBFT in the United States was calculated to be 0.9 and 4.7 µSv for average consumers and subsistence fishermen, respectively. Such doses are comparable to, or less than, the dose all humans routinely obtain from naturally occurring radionuclides in many food items, medical treatments, air travel, or other background sources. Although uncertainties remain regarding the assessment of cancer risk at low doses of ionizing radiation to humans, the dose received from PBFT consumption by subsistence fishermen can be estimated to result in two additional fatal cancer cases per 10,000,000 similarly exposed people.

  • 1To whom correspondence should be addressed. E-mail: nicholas.fisher@stonybrook.edu.
  • 2Present address: School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794.

  • Author contributions: N.S.F., Z.B., and D.J.M. designed research; N.S.F., K.B.-S., T.G.H., Z.B., and D.J.M. performed research; N.S.F., K.B.-S., T.G.H., Z.B., and J.G.-L. analyzed data; and N.S.F., K.B.-S., T.G.H., Z.B., and J.G.-L. wrote the paper.

  • The authors declare no conflict of interest.

  • This article is a PNAS Direct Submission.

  • This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1221834110/-/DCSupplemental.

Freely available online through the PNAS open access option.