Reply to post: Re: 1952?

Fukushima reactors lend exotic nuclear finish to California's wines

Robert Sneddon

Re: 1952?

Pu-239 has a longish half-life, about 24,000 years. Any Pu-239 created in the early days of atomic weapons development in the mid-40s will not have experienced much radioactive decay -- one online calculator I've used suggests that about 0.2% of that original Pu-239 would have decayed into U-235.

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