[https://www.theguardian.com/environment/2023/jul/24/fukushima-fish-with-180-times-legal-limit-of-radioactive-cesium-fuels-water-release-fears](https://www.theguardian.com/environment/2023/jul/24/fukushima-fish-with-180-times-legal-limit-of-radioactive-cesium-fuels-water-release-fears)
What does this mean? Is it really safe for human to consume the fish with 180 times legal limit of radioactive cesium fuels water?
What is the radioactive cesium fuels water ?
In: 3
So first off, this fish is apparently a *spectacular* outlier, being an order of magnitude above those other record fish the article mentions, which together were three out of 22 fish found above that legal limit of 100 Bq (the article neglects to mention how many fish were sampled *in total* — is this 22 out of 100, 22 out of 10,000…?).
Secondly, you’re kind of reading the title wrong; the “fuel” part relates to “fueling fear”, not something like “nuclear fuel”.
Having said that, the cesium-137 all came from the initial 2011 disaster. The water release plans that are somewhat controversial now are about cooling water that has built up ever since; this cooling water, after decontamination, still contains a very small amount of tritium (hydrogen-3 if you will). The plant operator is running out of space at the site and eventually needs to take that water somewhere. It’s clean enough that, especially once diluted by the ocean’s worth of water out front of the plant, the activity of that tritium is a non-issue and has been approved by the IAEA.
tl;dr
finding a few fish who gulped up some cesium-137 from the original disaster has essentially nothing to do with the present-day minimal tritium contamination in the water they plan to release. The former shouldn’t fuel any fears about the latter. Plus, [as another comment rightly points out](https://www.reddit.com/r/explainlikeimfive/comments/15drb54/eli5_fukushima_fish_with_180_times_legal_limit_of/ju3ivfl/), this one record fish isn’t even dangerous in practice. For more political reasons, though, china in particular seems very happy to grab on to headline-worthy radiation scares.
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