U.S.Nuclear Regulatory Commission's Review of the Impact of Inservice Inspection of BWR Reactor Pressure Vessel Welds on Vessel Failure

摘要

The Boiling Water Reactor (BWR) Vessel and Internals Project (BWRVIP) proposed to eliminate inservice inspection of circumferential welds in BWR reactor pressure vessels (RPVs), except for small lengths of circumferential welds at the intersection of axial welds. The BWRVIP provided a risk informed assessment (BWRVIP-05) that included the frequency of events that could lead to BWR vessel failure and that estimated the probability of vessel failure from these events.