Removal of impurities from coolant of a nuclear reactor

Details Removal of impurities from coolant of a nuclear reactor Removal of impurities from coolant of a nuclear reactor

1988-11-14

1991-07-09

Lechert, Jr., Stephen J.

Induced nuclear reactions: processes, systems, and elements

Fission reactor material treatment

Impurity removal

376315, G21C 1942

Patent

active

050304119

ABSTRACT:
The coolant is circulated thorugh the core of the reactor by a pump between a higher-pressure plenum and a lower-pressure plenum. The impurities are removed by a cold trap between the higher-pressure plenum and the lower-pressure plenum. The trap is an integrated unit including an inner tube and an outer tube defining between them an annulus which contains packing. The outer surface of the outer tube is cooled to a temperature such that the impurities are precipitated from the coolant. Since the packing is coldest on the outside, the precipitation progresses axially upstream to downstream and radially inwardly. The precipitation in the outer part of the annulus insulates the inner part of the annulus thermally so that the reduction of the temperature of the coolant to saturation level in the inner part is delayed precluding premature blocking of the cold trap. The cooled coolant in the annulus also precools the coolant flowing in through the inner tube.

REFERENCES:
patent: 3618770 (1971-11-01), Pohl et al.
patent: 3693959 (1972-09-01), Swinhoe et al.
patent: 3962082 (1976-06-01), Hundal
patent: 4010068 (1977-03-01), Cooper
patent: 4278499 (1981-07-01), Abramson et al.
patent: 4488964 (1984-12-01), Mitsutsuka

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