Bottom nozzle with internal debris filter
AssigneeWestinghouse Electric Corp.
InventorsMichael E. Conner, Thanh H. Do, Caroline K. Duncan, Robert A. Brewster, Artem Aleshin
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Abstract
Apparatuses, systems, and methods of filtering debris from the bottom nozzle of a nuclear reactor while minimizing loss coefficients are disclosed herein, including a debris filter bottom nozzle with a plate-like body, a plurality of flow passages, and a filter positioned within at least one flow passage, wherein the at least one flow passage has a dimension based at least in part on a predetermined loss coefficient of the at least one flow passage and a predetermined filtration capability of the filter.
Claims20
A flow passage formed within a debris filter bottom nozzle configured for use in a nuclear reactor, wherein the debris filter bottom nozzle is configured to be overlaid with a protective grid, wherein the protective grid comprises a plurality of straps, the flow passage comprising:
- an inlet;
- an outlet;
- an internal cavity formed between the inlet and the outlet;
- a plurality of filtering ligaments positioned within the internal cavity, wherein the plurality of filtering ligaments are configured to transect the plurality of straps;
- and
- a dimension, wherein a magnitude of the dimension is determined based at least in part on a predetermined loss coefficient of the flow passage and a predetermined filtration capability of the plurality of filtering ligaments.
A method of manufacturing a debris filter bottom nozzle configured for use in a nuclear reactor, wherein the debris filter bottom nozzle includes a plurality of flow passages, the method comprising:
- determining a maximum loss coefficient of the debris filter bottom nozzle;
- determining a minimum filtration capability of the debris filter bottom nozzle;
- calculating a dimension of the plurality of flow passages based at least in part on the maximum loss coefficient and the minimum filtration capability;
- producing a plate body of the debris filter bottom nozzle;
- producing the plurality of flow passages within the plate body of the debris filter bottom nozzle, wherein at least one of the flow passages of the plurality of flow passages comprises the calculated dimension;
- and
- producing a filter comprising the minimum filtration capability within the at least one flow passage.
Dependencies are inferred from the claim text.