Oral Answers to Questions — Hydrogen Bomb Tests

Part of the debate – in the House of Commons at 12:00 am on 12th December 1957.

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Photo of Mr Harold Macmillan Mr Harold Macmillan , Bromley 12:00 am, 12th December 1957

I do not think that is really quite the case. Radio-manganese is not a fission product. Where it has been found to be released it has come not from the fission but from some equipment associated with the device. The physical half-life of radio-manganese is only 291 days compared to 28 years for strontium 90. Its life is very small, and therefore I would have said, in considering this Question, that there are almost minimal risks.