Closeout of NRC bulletin 87-01: Thinning of pipe walls in nuclear power plants

Abstract

Documentation is provided in this report for the closeout of NRC Bulletin 87-01 regarding monitoring the thickness of pipe and component walls in high-energy single-phase and two-phase carbon steel piping systems of nuclear power plants. Both safety-related and non-safety-related systems are included in the monitoring program. The bulletin required five (5) actions by licensees and holders of construction permits. Complete closeout of the bulletin for 119 affected facilities and conclusions are based on Generic Letter (GL) 89-08. This GL requires written assurance that the licensing basis continues to be met by high-energy carbon steel piping systems subject to erosion/corrosion. Background information is provided in the Introduction and Appendix A.