Core shroud, in particular for cladding a reactor core in a boiling-water nuclear reactor and a method for repairing a core shroud

US5729581A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Ralf Loock · Baiersdorf, DE
• Theo Kaufl · Dresden, DE
• Herbert Schramm · Leonberg, DE

Key dates

• Filing date: Mar 14, 1997
• Grant date: Mar 17, 1998
• Expiry date: Mar 14, 2017

Classification

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

Abstract

Core shrouds are conventionally welded together from cylindrical parts and annular flanges, wherein cracks have recently occurred in the region of weld seams in reactors of the boiling-water type. A core shroud, in particular for cladding a reactor core in a boiling-water nuclear reactor and a method for repairing a core shroud, include recesses disposed transversely relative to the circumferentially extending weld seams. The recesses have a middle part which passes through a region that is thermally influenced during welding as well as transverse grooves or widenings located in front of ends of the middle part and lying outside the thermally influenced region. A clamp which is fitted into the recess is disposed approximately flush with a shroud surface and is wedged in one of the transverse grooves.