Method for coextracting uranium, plutonium and neptunium

An extraction and neptunium co-extraction technology, applied in the field of co-extraction of plutonium, uranium and neptunium, can solve the problems of increasing the salt content of radioactive waste, increasing the difficulty and cost of nuclear waste disposal, and the low extraction rate of neptunium
CN102776372AActive Publication Date: 2012-11-14CHINA INSTITUTE OF ATOMIC ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA INSTITUTE OF ATOMIC ENERGY
Publication Date
2012-11-14

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Abstract

The invention belongs to the technical field of nuclear fuel cycles, and discloses a method for coextracting uranium, plutonium and neptunium. The method is implemented in a way that: neptunium is coextracted with uranium and plutonium at the co-decontamination section, so that the neptunium enters an organic phase 1AP. The key point is to oxidate Np (V) in an extraction apparatus 1A into Np (VI) which can be extracted by the extraction apparatus. The method implements high yields of uraniumm, plutonium and neptunium, does not increase the salt content in the after-treatment process, and can implement quantitative extraction of the uranium, plutonium and neptunium.
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Description

Technical field

[0001] The invention belongs to the technical field of nuclear fuel cycle, and specifically relates to a method for co-extraction of uranium, plutonium and neptunium. Background technique

[0002] 237 Np is a transuranium element, a fissile nuclear material, and one of the by-products of the reprocessing plant, with a half-life of 2.14×10 6 year. In a typical light water reactor spent fuel, each ton of spent fuel contains about 500-700 grams 237 Np; in fast reactor spent fuel, there are approximately 200 grams per ton of spent fuel 237 Np.

[0003] due to 237 Np is highly radioactive. In the nuclear fuel cycle, if it is used as nuclear waste for geological disposal after glass solidification, the disposal cost is high and it will have an incalculable impact on the ecological environment. And if it will be greater than 99% 237 Separating Np from spent fuel can greatly reduce the radioactive toxicity of nuclear waste and the cost of geological disposal. In addition,...

Claims

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