spent fuel


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spent fuel

[′spent ′fyül]
(nucleonics)
Nuclear reactor fuel that has been irradiated to the extent that it can no longer effectively sustain a chain reaction because its fissionable isotopes have been partially consumed and fission-product poisons have accumulated in it.
References in periodicals archive ?
A handheld optical instrument called an Improved Cerenkov Viewing Device (ICVD) is used to confirm the presence of spent fuel stored underwater.
A spent fuel pool is not the best choice for storage of fuel at a decommissioning plant," he said.
The Russian law on environmental protection allows transportation of spent fuel assemblies to Russia, but does not sets forth the order for transportation of spent nuclear fuel.
Most of it remains in pools, which cool the spent fuel for several years once it comes out of the reactors.
Commenting on the objection that transport and disposal of spent fuel from nuclear power plants will be an unmanageable problem, he said "An idea of the smallness of the volume involved can be gauged from the fact that all the spent fuel discharged from both plants over their whole 60-year lifetime would not fill up a room of dimensions 15m x15m x 8m".
He said after sufficient cooling, the spent fuel can be transferred to a secure long term storage facility, adding there are tried and tested procedures for carrying out such a transfer without undue risk.
The NRC should consider alternatives to minimize the risks of storage of spent nuclear fuel and high level waste, including placement below ground level, elimination of the current practice of high-density storage of spent fuel in pools, and more robust designs for storage casks.
and to spent fuel and radioactive waste from military or defence programmes if and when such materials are transferred permanently to
In a matter of seconds, an unprotected human one foot away from a single freshly removed spent fuel assembly would receive a lethal dose of radiation.
The Fukushima crisis has highlighted the dangers of spent fuel pools, which are outside the robust primary containment vessels of the reactors themselves," he further added.
Each member state will also have to set up a regulatory body in charge of managing spent fuel and radioactive waste, with certain conditions being set to guarantee its independence.
The spent fuel in pools adjacent to each reactor, containing more radioactivity than the reactors themselves, has also been severely damaged, has leaked radioactivity, and is still without needed stable cooling.