Research and Application of Modification Scheme for Supports and Hangers of Special Pipes for OLE Project of Qinshan Nuclear Power Plant

“Modification of nuclear level 2 and 3 pipe supports and hangers” is one of the modifications of Qinshan Nuclear Power Pant operation license extension (OLE) project. In the project, there are two kinds of special supports and hangers which are common but difficult to modify: one is the rigid bracing piece support not perpendicular to the pipe axis, the other is the guide support using the “guide support base plate”. In order to meet the modification design requirements and relevant laws and regulations, two new standard support and hanger components are designed, standardized and serialized, which can meet the modification requirements with the existing standard components. The two modification design schemes solve the problem of project modification, and have the advantages of convenient modification, strong universality and easy promotion.