Control rod for boiling water reactor and method for...

Induced nuclear reactions: processes – systems – and elements – Control component for a fission reactor

Reexamination Certificate

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Details

C376S207000, C376S260000, C376S333000, C376S353000, C376S458000, C376S463000, C219S121360, C219S121630, C219S121600, C219S136000, C219S121640

Reexamination Certificate

active

06882696

ABSTRACT:
A tie rod having a cruciform cross section is provided with steps for fixing sheaths at tips of cruciform arms of the tie rod; the tips of each of sheaths are fitted onto the steps of the tie rod, each of the sheaths having a U-shaped cross section; and each of the sheaths is fixed to the tie rod by performing a laser welding using a YAG laser beam or a CO2laser beam with the sheath being fitted onto the tie rod to achieve a continuous weld of at least a part of the tie rod in a longitudinal direction thereof. An axial center position of the beam is shifted from an end face position of the step of the tie rod at least toward an axis center of the tie rod.

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