Nuclear reactor core refueling method

Details Nuclear reactor core refueling method Nuclear reactor core refueling method

1976-09-07

1978-04-25

Bentley, Stephen C.

176 77, 176 94, 214 18N, G21C 1920, G21C 330, B66C 1708

Patent

active

040861333

ABSTRACT:
A method for refueling a nuclear reactor core inside a pressure vessel is described. The method is used with a core which has at least one region comprised of a plurality of layers, each layer being comprised of a plurality of individual fuel elements with the corresponding fuel elements in respective layers forming columns extending transversely of the layers. Unspent fuel elements are first removed from the pressure vessel to expose at least one but not all of the spent fuel elements. The exposed spent fuel elements are then removed and the unspent elements are shuffled within the reactor core without being removed therefrom to expose additional spent fuel elements. These are removed and the shuffling process is repeated until all of the spent fuel elements have been removed. The initially removed unspent elements are then returned to the pressure vessel and placed in the core. New unspent fuel elements are then placed in the pressure vessel to complete the core.

REFERENCES:
patent: 3383286 (1968-05-01), Paget
patent: 3676297 (1972-07-01), Rennie
patent: 3711369 (1973-01-01), Pugh
Motoda, "Nuclear Science & Engineering", Technical Notes, 49, 515-524 (1972).

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