- 专利标题： Method for preparing a powder comprising particles of triuranium octoxide and particles of plutonium dioxide
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申请号： US16770836申请日： 2018-12-07
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公开(公告)号： US11594344B2公开(公告)日： 2023-02-28
- 发明人: François Poncelet , Nicolas Vigier , Bénédicte Arab-Chapelet , Aurélie Gauthe , Eléonore Welcomme , Marie Hélène Noire
- 申请人： ORANO CYCLE , COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES
- 申请人地址： FR Courbevoie; FR Paris
- 专利权人： ORANO CYCLE,COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES
- 当前专利权人： ORANO CYCLE,COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES
- 当前专利权人地址： FR Courbevoie; FR Paris
- 代理机构： Pearne & Gordon LLP
- 优先权： FR1761947 20171211,CN201810367647.6 20180423
- 国际申请： PCT/EP2018/083998 WO 20181207
- 国际公布： WO2019/115394 WO 20190620
- 主分类号： G21C19/46
- IPC分类号： G21C19/46 ; C01G43/01 ; C01G56/00 ; G21C3/62
摘要：
A method for preparing a powder comprising an intimate mixture of U3O8 particles and PuO2 particles and which may further comprise particles of ThO2 or NpO2. The method comprises: preparing, via oxalic precipitations, an aqueous suspension S1 of particles of uranium(IV) oxalate and an aqueous suspension S2 of particles of plutonium(IV) oxalate; mixing the aqueous suspension S1 with the aqueous suspension S2 to obtain an aqueous suspension S1+2; separating the aqueous suspension S1+2 into an aqueous phase and a solid phase comprising the particles of uranium(IV) oxalate and the particles of plutonium(IV) oxalate; and calcining the solid phase to convert (1) the particles of uranium(IV) oxalate to particles of triuranium octoxide and (2) the particles of plutonium(IV) oxalate to particles of plutonium(IV) dioxide, whereby the powder is obtained.
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