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Fukushima wastewater released into the ocean, China bans all Japanese seafood (www.reuters.com)

submitted 1 year ago by NightOwl@lemm.ee to c/worldnews@lemmy.ml

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Japan exported about $600 million worth of aquatic products to China in 2022, making it the biggest market for Japanese exports, with Hong Kong second. Sales to China and Hong Kong accounted for 42% of all Japanese aquatic exports in 2022, according to government data.

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[-] p1mrx@sh.itjust.works 7 points 1 year ago* (last edited 1 year ago)

Radiation levels have decreased since the accident in 2011:

https://upload.wikimedia.org/wikipedia/commons/0/06/Fukushima_radiation_dose_map_2011-04-29.png

Note that on Safecast, you can enable "Crosshair" in the hamburger menu to see the actual numbers.

The central blob area is currently around 5 μSv/hr, so if you live there for a year it's 44000 μSv, or 44 mSv. The xkcd chart says 100 mSv is the lowest one-year dose clearly linked to increased cancer risk.

[-] culprit@lemmy.ml 3 points 1 year ago

So 3 years there equals measurable increased cancer risk.

[-] Pseu@kbin.social 10 points 1 year ago

Cancer risk from radiation is not just the absolute amount of exposure, but the duration of the exposure as well. Short high-intensity radiation doses carry higher risk than long, low-intensity doses.

And 100mSv/yr is a rate, which is greater than 44mSv/yr. After 4 years, you will still have not had the dose needed that is linked with increased cancer risk.

[-] deegeese@sopuli.xyz 7 points 1 year ago

Read it again. Not what they said.

[-] culprit@lemmy.ml 3 points 1 year ago

if you live there for a year it’s 44000 μSv, or 44 mSv

44 x 3 = 132 which is GREATER than 100

[-] deegeese@sopuli.xyz 11 points 1 year ago

You can’t compare exposure over 3 years to a limit for one year.

Radiation damage depends on time period of exposure.

[-] culprit@lemmy.ml 3 points 1 year ago

the graph on the map is μSv/h

using the crosshairs shows 29.88 μSv/h at the waterfront by the plant

that is 0.02988 μSv/h = 261.7488 mSv/a

so not a place I'd want to get food from to say the least

[-] FaceDeer@kbin.social 7 points 1 year ago* (last edited 1 year ago)

That's on land. Where a whole bunch of various radionuclides have concentrated and remain fixed in place.

This "wastewater release" that's being discussed is the release of low-intensity tritium that will immediately dilute into the whole ocean. You're comparing apples to moonrocks. Completely different things.