Description

The category SYSTEM VARIABLE includes FEPs that represent the variables needed to describe the evolution of the state of the engineered barrier system components and the geosphere over time. They are thus essentially tables with definitions. The identification of variables has been made by the experts responsible for the documentation of the processes relevant to long-term safety. The sets of variables were established in conjunction with the documentation of the processes, since it had to be ensured that the variable sets were suited to describing all conceivable alterations of the barrier properties as a result of the long-term processes. The System variable FEPs are either related to the reference initial state of the system components or to the evolution in states as a result of on-going processes. The System variable FEPs are divided into the same system components as is used for Internal porcess FEPs: Fuel/cavity in canister, Cast iron insert and copper canister, Buffer, Bottom plate in deposition holes, Backfill in tunnels, Tunnel plugs, Central area, Top seal, Borehole seals and Geosphere.

Main Category

Main category for FEP

System variable