Method and apparatus for repairing a riser brace in nuclear...

Joints and connections – Interfitted members – Clamped members

Reexamination Certificate

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Details

C248S245000

Reexamination Certificate

active

06857814

ABSTRACT:
A clamp apparatus is provided which is designed to structurally replace a weld that attaches a riser brace assembly to a reactor vessel wall, and to stiffen the entire riser brace assembly, thereby increasing the natural vibration frequency of the riser brace assembly. Installation of the clamp apparatus should not require removal of any installed reactor hardware, such as jet pump assembly hardware or shroud repair hardware. In an embodiment, the clamp apparatus may include a first plate arranged so as to mate with a first groove on the riser brace, and a second plate arranged so as to mate with a second groove on the riser brace. The grooves provide alignment for the clamp apparatus, so that the first and second plates can be fixedly secured to the riser brace.

REFERENCES:
patent: 3865095 (1975-02-01), Helmick
patent: 20030095831 (2003-05-01), Monson et al.

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