Holddown leaf spring assembly having a lubricant coating

Details Holddown leaf spring assembly having a lubricant coating Holddown leaf spring assembly having a lubricant coating

1992-09-25

1993-11-30

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Reactor structures

Circulating fluid within reactor

376285, 376415, G21C 330

Patent

active

052672875

ABSTRACT:
In a method for fabricating an end fitting (12,200) for a nuclear fuel assembly (10), wherein the end fitting includes at least one spring member (24,202) having an active external surface (32,206) for contacting rigid core support structure (100) in the nuclear reactor, the improvement comprising applying a coating to the active surface of the spring member. The coating is selected from the group consisting of nitrides, Cr, TiC, CrC, ZrC and NiTaB. The spring member is preferably Inconel and the coating is one of ZrN or TiN. Each spring member can be formed by nesting a plurality of spring elements (28,34,36 or 208,210) so that the spring elements are in contact with each other and the method includes applying said coating to each of the spring elements at least where they contact each other.

REFERENCES:
patent: 4710343 (1987-12-01), Christiansen et al.
patent: 5053191 (1991-10-01), Bryan et al.

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