RBMK 1000 graphite stack lifetime
RBMK-1000 Graphite Stack Lifetime Recovery Technology
Introduction
During the operation of RBMK-1000 reactors, radioactive swelling of the graphite occurs, leading to curvature of the graphite columns and, consequently, the process and control rod channels. Graphite stack life is the most important limiting factor for RBMK-1000 reactor operation, as the graphite stack is an irreplaceable component of the reactor. For continued operation of RBMK-1000 NPPs, the straightness of the graphite columns must be restored. This is achieved by creating free volumes in the graphite stack by removing some of the graphite—slitting the graphite columns longitudinally. This restores the graphite stack lifespan, enabling continued operation of RBMK-1000 NPPs.