burnable poison

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burnable poison

[′bərn·ə·bəl ′pȯiz·ən]
(nucleonics)
A neutron absorber that is incorporated in the fuel or fuel cladding of a nuclear reactor and gradually burns up under neutron irradiation. Also known as burnout poison.
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The shock warning comes after scientists failed to find a batch of the nuclear poison which was dumped into the Irish Sea in the Sixties.
Her PR patter has her arguing that new technologies mean that nuclear poisons will eventually be taken out of the Irish Sea and that emissions are now only one per cent of what they were in the 1970s.