Method for the manufacture of oxidic sintered nuclear fuel bodies

US4578229A · kind A · utility

Assignee

• Kraftwerk Union Aktiengesellschaft · DE

Inventors

• Helmut Assmann · Dormitz, DE
• Gerhard Dichtjar · Langenselbold, DE
• Wolfgang Dorr · Herzogenaurach, DE
• Georg Maier · Weisendorf, DE
• Viktor Mathieu
• Martin Peehs · Bubenreuth, DE

Key dates

• Filing date: Oct 25, 1982
• Grant date: Mar 25, 1986
• Expiry date: Oct 25, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E30/30
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

Method for the manufacture of oxidic nuclear fuel bodies by a heat treatment of blanks obtained from UO.sub.2 starting power or a mixture of UO.sub.2 and PuO.sub.2 starting powder at a treatment temperature in the range of 1000.degree. C. to 1400.degree. initially in a gas atmosphere with oxidizing action and subsequently in a gas atmosphere with reducing action. The oxygen potential of the gas atmosphere with oxidizing action is kept in a range in which a crystallographically demonstrable U.sub.4 O.sub.9 or (U, Pu).sub.4 O.sub.9 crystal phase is generated in the blanks during the heating to the treatment temperature in this gas atmosphere with oxidizing action.