Two part tie plate adapted to D & C lattice

Induced nuclear reactions: processes – systems – and elements – Reactor structures – Orifice or fluid control at inlet or outlet of coolant channels

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376448, G21C 104

Patent

active

054066042

ABSTRACT:
A two part lower tie plate assembly is disclosed for use with a fuel bundle of a boiling water nuclear reactor. The two parts include a rod supporting grid section and nozzle section. Both the rod supporting grid section and the nozzle section are constructed asymmetrically. The rod supporting grid section contains one half of the total offset required for a D lattice lower tie plate and the nozzle section contains one half of the total offset required for a D lattice lower tie plate. When a D lattice lower tie plate is required, assembly occurs so that the offsets are additive. When a C lattice lower tie plate is required, assembly occurs that the offsets are subtractive. Assembly of the lower tie plate is provided be either bolting or welding. There results on single rod supporting grid and nozzle section components capable of assembly to fit either a C or a D lattice.

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