Title:
UF6の乾式法転換によって得られる二酸化ウランの、噴霧乾燥による、成型可能な粉末の調製
Document Type and Number:
Japanese Patent JP4440475
Kind Code:
B2
Abstract:
The invention relates to a process for preparing a castable powder of uranium dioxide UO2, for use in the manufacture of MOX fuel.This process comprises the following stages:1) to prepare an aqueous suspension of a powder of UO2 obtained by dry process from uranium hexafluoride, said suspension comprising 50 to 80% by weight of UO2 and at least one additive chosen among deflocculation agents, organic binders, hydrogen peroxide H2O2 and a powder of U3O8, in such a quantity that the viscosity of the suspension does not exceed 250 mPa.sec, and2) to atomise this suspension and dry it in a hot gas, at a temperature of 150 to 300° C., to obtain a castable powder of UO2 with an average particle size of 20 to 100 mum.
Inventors:
Jean-Marc Bonnelot
Laurent Bruneau
Mireille Bauer
Laurent Bruneau
Mireille Bauer
Application Number:
JP2000583814A
Publication Date:
March 24, 2010
Filing Date:
November 24, 1999
Export Citation:
Assignee:
COMPAGNIE GENERALE DES MATIERES NUCLEAIRES
Areva Ense
Areva Ense
International Classes:
C01G43/025; B01J2/04; G21C3/62
Domestic Patent References:
| JP8062362A | ||||
| JP1148994A |
Foreign References:
| US3321560 |
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
Shinya Mitsuhiro
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
Shinya Mitsuhiro