Radiation fall out from Japan

Better yet, do a bit of reading about some of his outlandish contentions (West Coast being "inhabitable" in a couple of years ---to whom? for what?)

There are lots of people checking becquerel counts in the food we eat

I'm in the seafood biz--I do lots of stuff in Asia. In Korea, they have people with geiger counters in some of the supermarkets just to show the consumers that all is well. The people who make the biggest noise about food being "unfit for consumption" ? If you peak beneath their petticoats you see they're marketing competing products so it's more a question of getting the competitive edge in the market place rather then finding food that that's truly unfit for human consumption.

That is NOT to say that Fukushima is behind us. It remains to be seen how TEPCO handles the containment issue and all the things that could go wrong while they stumble their way through the operational maze of containment and disposal.

You can bet there's more people then Turner radio network watching all this---TEPCO so far hasn't inspired alot of confidence in how they've handled things--- if the news really does get BAD, we'll hear about it in short order
 
I'll keep eating albacore tuna until I'm glowing or I can power my own boat just by being on it lol :p:D.
 
http://rpd.oxfordjournals.org/content/157/1/1.full

Radiation Protection Dosimetry (2013), Vol. 157, No. 1, pp. 1–5 doi:10.1093/rpd/nct239
Advance Access publication 29 September 2013

Editorial
EVALUATION OF RADIOACTIVITY CONCENTRATIONS FROM THE FUKUSHIMA NUCLEAR ACCIDENT IN FISH PRODUCTS AND ASSOCIATED RISK TO FISH CONSUMERS
#The Author 2013. Published by Oxford University Press.

Radioactive contamination of the Pacific Ocean following the Fukushima nuclear accident has raised public concerns about seafood safety(1, 2). Many people are wondering whether fish products from the Pacific Ocean and Japan are safe to eat 2 y after the accident. There is also some concern about seafood caught locally, outside of Japan. Based on monitoring data reported in July 2013, radioactive caesium concentrations in fish products from Fukushima and adjacent prefectures are evaluated. Resulting radiation doses from annual consumption at average contamination levels and occasional fish meals at much higher levels of caesium are calculated. To put radiation doses from caesium intake in perspective, comparisons are made to doses from naturally occurring radioactive polonium commonly found in fish. Discussion and conclusions are given subsequently.

The Tokyo Electric Power Company has conducted routine radioactivity measurements (134Cs and 137Cs) of various marine fish and shellfish in the ocean area within a 20-km radius of the Fukushima Daiichi Nuclear Power Station (FDNPS). Based on their posted summary on 16 August 2013(3), a total of 100 fish samples were collected from 7 to 23 July, offshore of the FDNPS and outside of its port area. The nuclide analysis report showed that 134Cs was detected in 64 samples with concentrations varying from 3.5 to 130 Bq kg21. 137Cs was detected in 79 samples and the concentration varied from 3.6 to 260 Bq kg21. On average, fish and shellfish caught within 20-km offshore of the FDNPS contain 12 Bq kg21 of 134Cs and 26 Bq kg21 of 137Cs.

The Japanese Fisheries Agency (JFA), in cooperation with the relevant prefectural governments and organisations, has conducted sampling and inspections of fishery products at the major fishing ports in Fukushima and adjacent prefectures on a weekly basis to examine the possible contamination of fishery products by radioactive materials released from the FDNPS. Based on press releases made by the JFA in July 2013(4), a total of 1952 fishery products were analysed for caesium. Among them, 134Cs was found in 485 samples (25 %) and 137Cs was detected in 776 samples (40 %). The analyses were done by various institutions and the laboratory detection limits varied from ,1 Bq kg21 to 10 Bq kg21. Among those samples with concentrations above detection limits, the reported 134Cs concentrations varied from 0.1 to 338 Bq kg21 with an average of 11 Bq kg21. The reported 137Cs concentrations varied from 0.1 to 699 Bq kg21 and the mean of the reported values is 18 Bq kg21. The highest concentrations (338 Bq kg21 for 134Cs and 699 Bq kg21 for 137Cs) were reported on 11 July from a sample of sea bass, offshore of Hitachi city. When averaged over all 1952 samples (with zero concentration for those below the detection limit), fish products from a broad ocean area in eastern Japan contain on average 3 Bq kg21 of 134Cs and 7 Bq kg21 of 137Cs.

Naturally occurring radionuclides exist in the environment in the air we breathe and in the water we drink. Not surprisingly, naturally occurring radionuclides can be found in varying concentrations in fishery products. A literature review conducted by Hosseini et al.(5) revealed that the mean activity concentrations of natural occurring radionuclides in generic marine fish are 83 Bq kg21 of 40K, followed by 30 Bq kg21 of 210Po, 19 Bq kg21 of 14C and 1.8 Bq kg21 of 228Ra. Potassium is ingested in many foods that we eat and is a critically important element for proper functioning of the human body. Because the potassium content of the body is under strict homeostatic control in which the amount retained is actively regulated by the body, the 40K content in the human body is constant and not influenced by variations in environmental levels. Therefore, the effect of 40K intake from fish consumption will not be considered in the following discussion. For similar reasons, the effect of 14C will also be excluded in the subsequent dose assessment."


Conclusions:

"an annual fish consumption of 8.8 kg, radioactive caesium would contribute a radiation dose of 1.3 mSv to adults and 0.9 mSv to children. These doses are only a small fraction of the radiation doses due to naturally occurring radionuclides normally found in fish, 0.4 % for adults and 0.08 % for children."

AND

"When averaged over a wide range of fish products from broad ocean areas in eastern Japan, the contamination levels for radioactive caesium are very low. However, occasionally, individuals may have meals made from heavily contaminated fish."
 
Last edited by a moderator:
Back
Top