Forced gas flow canister dehydration

Details Forced gas flow canister dehydration Forced gas flow canister dehydration

2007-05-01

2007-05-01

Gravini, S. (Department: 3749)

Drying and gas or vapor contact with solids

Process

Gas or vapor contact with treated material

Reexamination Certificate

active

11477189

ABSTRACT:
The present invention provides a method and system for ensuring that cavities used to store radioactive elements are adequately dried without intrusive measuring. In one aspect the invention is a system for drying a cavity loaded with radioactive elements, the loaded cavity having a free volume (VF), a starting vapor pressure (vPS), and a cavity pressure (PC), the system comprising: a non-reactive gas source adapted to supply a non-reactive gas to the system; means to cool a non-reactive gas to a temperature (TC) thereby drying the non-reactive gas; means to flow the dry non-reactive gas to the cavity, the flow means adapted to introduce the dry non-reactive gas to the cavity at a flow rate R for a period of time (t); and means to remove wet non-reactive gas from the cavity; wherein the non-reactive gas source, the cooling means, the flow means, the removal means, and the cavity are fluidly coupled; wherein TCand R are controlled to achieve a desired vapor pressure (vPD) in the cavity in time t.

REFERENCES:
patent: 3666616 (1972-05-01), Schluderberg
patent: 3865688 (1975-02-01), Kleimola
patent: 3950152 (1976-04-01), Guon
patent: 5453562 (1995-09-01), Swanstrom et al.

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