Compositions – Radioactive compositions – Nuclear reactor fuel
Patent
1994-09-12
1996-12-17
Mai, Ngoclan
Compositions
Radioactive compositions
Nuclear reactor fuel
423 10, 2041574, 2041582, 976DIG279, C09K 1104
Patent
active
055850430
ABSTRACT:
In a method of coextracting neptunium and plutonium, a nitric acid solution containing a mixture of neptunium and plutonium is oxidized by irradiation of ultraviolet light. As a result, different valences of neptunium are adjusted all into the valence 6, which can remain in water, and in the meantime, valences of plutonium are adjusted into the valence 4 or 6, which can be extracted in the organic phase. It is therefore possible to coextract neptunium and plutonium without difficulty. The coextracted neptunium and plutonium can be used in forming mixed fuel by blending at least a portion of at least one of neptunium and plutonium which neptunium and plutonium have been formed by separating a nitric acid solution containing neptunium and plutonium by exposing the solution and a reducing agent to ultraviolet radiation to adjust the valences, and extracting the solution using an organic phase to extract plutonium from the solution into the organic phase.
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PNC Technical Review, No. 88, Dec. 1993, "Basic Study of Photochemical Valency Adjustment of Plutonium (Pu) and Neptunium (Np) in Nitric Acid Solution," pp. 40-53. No translation.
Goibuchi Takayuki
Morimoto Kyoichi
Tomiyasu Hiroshi
Wada Yukio
Doryokuro Kakunenryo Kaihatsu Jigyodan
Mai Ngoclan
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