Test instrument manipulation for nuclear reactor pressure vessel

US5128094A · kind A · utility

Assignee

• MAN Energie GmbH · DE

Inventors

• Gunter Muller · Karlsruhe, DE
• Heinz Otte · Volkach, DE
• Werner Roth · Lenningen, DE

Key dates

• Filing date: Jan 8, 1991
• Grant date: Jul 7, 1992
• Expiry date: Jan 8, 2011

Classification

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

Abstract

A device for non-destructive testing of an upright cylindrical nuclear reactor pressure vessel in which there is disposed a coaxially arranged likewise cylindrical nuclear fuel container. A first upper annular rail is fastened to an upper edge of the pressure vessel. A second lower annular rail is fastened to an upper edge of the nuclear fuel container. A bridge element is displaceably mounted on the first annular rail. A vertical, hollow mast projects into the pressure vessel and has an upper end mounted at the bridge and a lower end movably mounted to said second annular rail so that the mast is movable in a circumferential direction of the pressure vessel. A deflectable belt is disposed for longitudinal displacement through the hollow mast. The belt exits the hollow mast at a lower region of the mast and has an end extendable into an annular space between an inner wall surface of the pressure vessel and an outer wall surface of the nuclear fuel container. A test instrument carrier is mounted at the end of the belt.