DEVELOPMENT OF THE SWEDISH NATIONAL DATABASE FOR QA OF SPENT NUCLEAR FUEL

The Swedish Nuclear Fuel and Waste Management Co (SKB) is responsible for all the back-end issues in the Swedish nuclear industry. SKB operates a central interim storage for spent nuclear fuel (Clab), and is responsible for research, development, construction and operation of a future final repository for spent nuclear fuel (SNF). Data for all the nuclear fuel assemblies (FA) in Sweden is stored in a national database, administrated by SKB. The national database is used for the administration and quality assurance (QA) of handling, transportation and storage of SNF. The database is continuously updated and includes data for all FA at the nuclear power plants (NPP), and all FA at the Clab facility. The data includes identification, fuel type, initial and irradiated masses for heavy metals, assembly enrichment and burnup, location (i.e. at NPP or Clab) and date for unloading. The database is an important tool for QA and administration of SNF for SKB. The QA consists of checking that fuel parameters are in accordance with the requirements in the certificate for the transport casks and the Safety Analysis Report (SAR) for the Clab facility prior to transportation from the NPP:s to Clab. Internal requirements at SKB regarding more fuel data for the long term safety analysis at a final repository, and the fact that SKB plans to apply burn up credit for the Clab facility and later the final repository, requires a new database in order to meet future QA requirements. The paper describes the program for developing and replacing the current database in order to meet future requirements regarding more detailed fuel data, and to use the application for QA of burnup credit. The database will ensure that required fuel data follows the FA from the reactor to the closure of the final repository for SNF.