Method for limiting movement of a thermal shield for a nuclear r

Details Method for limiting movement of a thermal shield for a nuclear r Method for limiting movement of a thermal shield for a nuclear r

1988-02-05

1989-07-18

Kyle, Deborah L.

Induced nuclear reactions: processes, systems, and elements

Reactor protection or damage prevention

Expansion means

376287, G21C 1100

Patent

active

048491586

ABSTRACT:
A method for limiting movement of a thermal shield of a nuclear reactor, and a thermal shield displacement limiter therefor, is provided where at least four and preferably six or more key-way inserts are positioned in pockets machined in the upper portion of a thermal shield, and bolted and doweled to the thermal shield. Each key-way insert is engaged by a limiter key that is bolted and doweled to the core barrel to tangentially restrain movement of the thermal shield relative to the core barrel, while allowing radial and axial movement to the thermal shield relative to the core barrel. Preferably, lock pins extend diametrically through the bolts and dial pins and engage the key-way insert and limiter key, respectively, to lock the bolts and dowels in position, and the engaging surfaces between the key-way inserts and the limiter keys are wear hardened.

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