Antieject device for control members of nuclear reactors

US5137682A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Gerhard Hau · Albstadt, DE
• Werner Meier · Burlington, US
• Helmut Moldaschl · Neunkirchen, DE
• Peter Rau · Leutenbach, DE
• Rainer Huber · Piding, DE
• Anton Kautetzky · Forchheim, DE
• Jorg Tschemernjak · Munich, DE

Key dates

• Filing date: Nov 26, 1990
• Grant date: Aug 11, 1992
• Expiry date: Nov 26, 2010

Classification

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

Abstract

A nuclear reactor includes a pressure vessel enclosing a plenum, a core in the pressure vessel, a pressure-tight encapsulation in the pressure vessel communicating with the plenum, and control members passing through the encapsulation and having first and second control member segments. The second control member segment has an absorber part to be at least partly inserted into and retracted out of the core for controlling reactivity. The first control member segment has an outer drive part. A control drive is associated with the outer drive part for adjusting the control member along the longitudinal direction thereof. An antieject device for restraining ejection of the control member out of the pressure vessel due to a leak at the encapsulation includes a rod coupling having a disengageable coupling catch interconnecting the first and second control member segments and remaining in engagement during normal control motion of the control member and means for unlocking the coupling catch. After disconnection the second control member segment and the absorber part remain in the core for assuming a position fully inserted into the core.