Top end support for water displacement rod guides of pressurized

Induced nuclear reactions: processes – systems – and elements – Miscellaneous

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376353, 376399, G21C 101

Patent

active

047073314

ABSTRACT:
A top end support for rod guides disposed in closely spaced, parallel axial relationship within an inner barrel assembly of a pressurized water reactor vessel includes, in telescoping relationship, a generally cylindrical support having an end closure with a central aperture therein for receiving a downwardly depending extension from a lower calandria plate and a sleeve having an outer periphery corresponding in cross-section to that of said rod guide and affixed thereto at its lower end, the sleeve having an interior, generally cylindrical surface for receiving the cylindrical support in close engagement therein. The telescopingly engaged, generally cylindrical surfaces of the cylindrical support and the sleeve provide substantial area to function as a long-life wear couple. Both the end closure and the cylindrical sidewalls of the fixed cylindrical support and the interior surface of the sleeve are configured so as to correspond to the perimeter of flow holes disposed in a symmetrical array about the associated depending extension, to permit unimpeded passage therethrough of the core outlet flow.

REFERENCES:
patent: 3212979 (1965-10-01), Silverblatt
patent: 3481832 (1969-12-01), Rickert
patent: 3816245 (1974-06-01), Bevilacqua
patent: 3915793 (1975-10-01), Andersson et al.
patent: 3940311 (1976-02-01), Frisch et al.
patent: 4416848 (1983-11-01), Feutrel
patent: 4563328 (1986-01-01), Steinke
patent: 4584168 (1986-04-01), Formanek
Translation of French Patent Application Nos. 2 326 763, 2 411 469.

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