Control rod and/or instrument tree assembly

Details Control rod and/or instrument tree assembly Control rod and/or instrument tree assembly

1974-12-30

1977-08-30

Feinberg, Samuel

G21C 708

Patent

active

040452832

ABSTRACT:
An improved core servicing apparatus for a nuclear reactor having a vessel, a head for the vessel, one or more penetration openings in the head and a core within the vessel of the type having an array of fuel assemblies and including apertures in the array for neutron absorbers. The servicing apparatus includes a support column adapted to be supported by and depend from the head in registry with a penetration opening; a plurality of core servicing elements which may include neutron absorber actuating means and/or instrument packages are supported by the support column; and means are provided for laterally displacing at least some of the servicing elements relative to the support column between a laterally compact and a laterally expanded configuration.
In one embodiment, instruments may be located at the lower end of long resilient cables and are longitudinally movable within and beyond guide channels supported by the support column. The guide channels are directed outward at their lower ends to direct a descending instrument and cable outwardly.

REFERENCES:
patent: 2898281 (1959-08-01), Untermeyer et al.
patent: 3146900 (1964-09-01), Anderson
patent: 3841964 (1974-10-01), Dumayne
patent: 3940311 (1976-02-01), Frisch et al.

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