"Bluefin tuna fish caught off the California coast are indeed safe to eat: the levels of radioactive cesium found in the tuna, between 5-10 becquerels (Bq), are far below the Japanese-set seafood safety limit of 100 Bq/kg, which was just reduced from 500 Bq/kg in April. And the levels are also lower than doses of naturally occurring isotopes in fish, such as radioactive potassium and polonium, said Buesseler."
So while things appear a little hairy around Fukushima, we can relax on this side of the ocean.
Uhmmm....no. It isn’t safe to eat. Patients in a hospital are given radioactive isotope tracers as a trade off - the patient signs a waiver acknowledging that even low level doses of radiation increase the risk of cancer but that the value of the diagnostic test outweighs the increased risk of cancer.
THere’s a video of a medical director of isotope treatments in Japan wherein he points out that isoptopes concentrate in different locations in the body based on the type of isotope and that drinking water containing 2 bequerels per liter (cesium) were shown to cause bladder cancer. Japan’s safety limits were raised when Fukushima happened. So were US safety limits. All that changed is that the countries are now accepting greater risks in their definition of ‘safe’.
Medical research dating back to the 1950’s demonstrates that there is no safe limit. To keep the populace from objecting to damaging effects of radioactive waste, the governments and nuke industries simply declare it safe.