Method for processing spent nuclear fuel comprising a step of decontaminating the uranium (vi) into at least one actinide (iv) by complexing this actinide (iv)

• Main Authors: BALAGUER CORALIE, BERNIER GILLES, MIGUIRDITCHIAN MANUEL, SOREL CHRISTIAN, AMEIL ESTELLE
• Format: Patent
• Language: Chinese; English
• Published: 10.08.2016
• Subjects: DECONTAMINATION ARRANGEMENTS THEREFOR; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL

The invention relates to a method for processing spent nuclear fuel which method involves a step of decontaminating the uranium (VI) into one or more actinides (IV) and, more specifically, into neptunium and/or plutonium, by complexing this (these) actinide(s) (IV). This method involves a step of decontaminating the uranium (VI) into at least one actinide (IV), which decontamination step involves at least one operation of extracting actinide (IV) out of an organic phase, not miscible in water, and in which phase the uranium (VI) and the actinide (IV) are present, by bringing the organic phase into contact with an aqueous phase containing nitric acid and at least one complexing agent which complexes the actinides (IV) more strongly than uranium (VI), then separating the organic phase from the nitric aqueous phase and is characterized in that said at least one complexing agent is a diglycol amide. Applications: the processing of spent nuclear fuels. 本发明涉及种用于处理废核燃料的方法，所述方法包括通过与种或多种锕系元素(IV)络合从该种或多种锕系元素(IV)中，更具体地从