Lower end fitting debris collector

Details Lower end fitting debris collector Lower end fitting debris collector

1988-04-15

1989-05-23

Behrend, Harvey E.

Induced nuclear reactions: processes, systems, and elements

Reactor structures

Orifice or fluid control at inlet or outlet of coolant channels

376313, 376462, 210488, G21C 304, G21C 1904, B01D 2508

Patent

active

048329053

ABSTRACT:
A fuel assembly (10) has a lower end fitting debris collector (40) assembled in the form of a welded assembly of an "eggcrate" grid (21) and cast base (40) with hollow legs (42). Fastener seats (46) in hollow legs (42) permit guide tubes (14) with internally threaded ends to be joined to the upper surface of the lower end fitting debris collector (40) by means of slotted fasteners (50). Bevels (62) and notches (64) in the grid bars (26 and 24a, respectively), provide an embodiment with contoured seats for fuel rod end caps (22). Otherwise, end caps (22) rest on grid (21) at the intersection of slottedly interlocked bars (24 and 26). Thin strips (30) mounted in slots between bars (24) and bars (26) provide small debris catching openings in grid (21).

REFERENCES:
patent: 4096032 (1978-06-01), Mayers et al.
patent: 4634525 (1987-01-01), Yant
patent: 4652425 (1987-03-01), Ferrari et al.
patent: 4664880 (1987-05-01), Bryan
patent: 4678627 (1987-07-01), Rylatt
patent: 4684495 (1987-08-01), Wilson et al.
patent: 4684496 (1987-08-01), Wilson et al.
patent: 4781884 (1988-11-01), Anthony

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