Cluster for adjusting a nuclear reactor core reactivity,...

Details Cluster for adjusting a nuclear reactor core reactivity,... Cluster for adjusting a nuclear reactor core reactivity,...

2008-09-09

2008-09-09

Palabrica, Rick (Department: 3663)

Induced nuclear reactions: processes, systems, and elements

Control component for a fission reactor

Nonconventional control material

C376S327000, C376S333000

Reexamination Certificate

active

10519507

ABSTRACT:
A control cluster for a pressurized water nuclear reactor comprising a bundle of neutron-absorbing rods each of which comprises a metal tube called cladding which is sealed off by a top end plug at its top end and by a bottom end plug at its bottom end and has a support, or spider, of radiating shape to which the absorber rods are attached through their upper end plugs, characterized in that the cladding of at least some of the absorber rods is weld-free hafnium tubes, the top end plugs of the absorber rods having hafnium cladding being of titanium-based alloy and being welded to the top end part of the hafnium cladding of the absorber rod, the bottom end plugs being of massive hafnium and being welded to the bottom.

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