SAFETY CONCEPT FOR FASTENINGS IN NUCLEAR POWER PLANTS

摘要

In nuclear power plants post-installed fastenings are often used. A decisive criteria for the use of fastenings in safety critical applications is the proper functioning of fasteners under special conditions such as impact loading and earthquake excitations and cracks in concrete with a width ≥ 0.5 mm due to earthquake loadings. Such special conditions are not covered by Technical Approvals according to, Therefore, in Germany a guideline for the assessment of fasteners in nuclear power plants has been published. This guideline is valid for undercut anchors with an embedment depth h_(ef) ≥ 80 mm, which are approved according to, In this paper the concept of the guideline is explained. Details of the required suitability tests and the tests to determine admissible service conditions are given. Furthermore, results of tests with different types and sizes of undercut anchors are shown.