| 摘要 |
Absorber needle for an absorber assembly of a fast-neutron nuclear reactor of the kind of those which comprise, in a known manner, a series of vertical needles 22 in a sheath 10, each needle being made up of a stack of pellets 41 of absorbing material in a metal sheathing 40 of elongated shape with a certain radial clearance in relation to this sheathing, characterised in that it comprises means 46, 47 for retaining fragments of absorbing material which are liable to appear during operation, at at least one portion of the horizontal junction planes between two consecutive pellets 41. <IMAGE>
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