Method for dissolving hard-to-dissolve thorium and/or plutonium

Details Method for dissolving hard-to-dissolve thorium and/or plutonium Method for dissolving hard-to-dissolve thorium and/or plutonium

1981-10-13

1985-07-09

Padgett, Benjamin R.

Compositions

Radioactive compositions

Nuclear reactor fuel

252637, 252638, 423 20, C09K 300

Patent

active

045281300

ABSTRACT:
Method for dissolving hard-to-dissolve thorium and/or plutonium oxides, especially dioxides such as ThO.sub.2, PuO.sub.2 or (U/Pu)O.sub.2 mixed oxides by heating the oxides in a hermetically sealed vessel in fluoride-free nitric acid. The use of a gas atmosphere containing oxygen in the sealed vessel is advantageous.

REFERENCES:
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patent: 3005682 (1961-10-01), Wilson
patent: 3298794 (1967-01-01), Mikesell, Jr. et al.
patent: 3488162 (1970-01-01), Sierzputowski
patent: 3841863 (1974-10-01), Caldwell et al.
patent: 3957676 (1976-05-01), Cooley et al.
patent: 4098866 (1978-07-01), Carnahan et al.
patent: 4124525 (1978-11-01), Borner
patent: 4201745 (1980-05-01), Zickgraf
patent: 4235740 (1980-11-01), Druckenbrodt et al.
Sisco, F., (ed) et al., 1963, Columbium and Tantalum, John Wiley and Sons, Inc. New York, pp. 304-312, 579-596.
Fansteel Metallurgical Corporation, 1937, Tantalum: Acid-Proof Process Equipment, pp. 3-33.

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