Could a fusion/fission hybrid reactor be "fail safe"?

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Offline Geezer

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There is on-going research into hybrid fusion/fission reactors. If I have it right, the general idea is that fission only takes place in response to bombardment from particles that result from fusion. I believe it's still a long way from being practical of course, but the thing that struck me about this approach is that it could possibly be made intrinsically fail-safe.

Conventional fission reactors operate because of a chain reaction, and, as we have seen several times now, when things go wrong, that chain reaction can be difficult to control.

Would I be right in thinking that as soon as the power is removed from the lasers that initiate the fusion process, the whole thing will start to cool down?
There ain'ta no sanity clause, and there ain'ta no centrifugal force Šther.