Dissolver vessel bottom assembly

Details Dissolver vessel bottom assembly Dissolver vessel bottom assembly

1975-01-08

1976-05-25

Emery, Stephen J.

Chemistry: physical processes

Physical processes

Crystallization

259 4R, 134 36, 266114, 423 4, 23267E, B01D 1102, B01F 100

Patent

active

039589480

ABSTRACT:
An improved bottom assembly is provided for a nuclear reactor fuel reprocessing dissolver vessel wherein fuel elements are dissolved as the initial step in recovering fissile material from spent fuel rods. A shock-absorbing crash plate with a convex upper surface is disposed at the bottom of the dissolver vessel so as to provide an annular space between the crash plate and the dissolver vessel wall. A sparging ring is disposed within the annular space to enable a fluid discharged from the sparging ring to agitate the solids which deposit on the bottom of the dissolver vessel and accumulate in the annular space. An inlet tangential to the annular space permits a fluid pumped into the annular space through the inlet to flush these solids from the dissolver vessel through tangential outlets oppositely facing the inlet. The sparging ring is protected against damage from the impact of fuel elements being charged to the dissolver vessel by making the crash plate of such a diameter that the width of the annular space between the crash plate and the vessel wall is less than the diameter of the fuel elements.

REFERENCES:
patent: 745472 (1903-12-01), Adams
patent: 1163097 (1915-12-01), MacDonald
patent: 1354850 (1920-10-01), Schneider
patent: 1807263 (1931-05-01), Walter
patent: 2699379 (1955-01-01), Luque
patent: 3307914 (1967-03-01), Heiss
patent: 3385674 (1968-05-01), Kolasinski
patent: 3553401 (1971-01-01), Janecke

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