Reply to post: Re: 1952?

Fukushima reactors lend exotic nuclear finish to California's wines

Symon Silver badge

Re: 1952?

Indeed, but Caesium-137 is produced from the nuclear fission of plutonium as well as uranium. That's because the plutonium 239 turns into uranium 235. So, the first substantial release of Caesium 137 was the trinity test.

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