THE SWEDISH PROGRAMME ON SEVERE ACCIDENT MANAGEMENT AND RELEASE MITIGATION

摘要

THE SWEDISH PROGRAMME ON SEVERE ACCIDENT MANAGEMENT AND RELEASE MITIGATION. The general guidelines for the Swedish programme on severe accident management and release mitigation were decided by the Swedish government in 1981 and February, 1986. The programme includes the following key elements: design specific level probabilistic safety analyses and analyses of plant response to severe accidents, including core melt sequences; development of plant specific accident management procedures; backfitting of improved protection against early containment failure in severe accident sequences and of filtered vent systems to avoid late containment failures, and to facilitate bringing the plant to a stable state with a depressurized containment; supporting research programmes (FILTRA, RAMAI-III). The basic objective of the programme is to decrease the risk of releases leading to large scale ground contamination, the target being to keep releases below 0.1% of core content of radionuclides such as caesium which cause such contamination. The programme is now nearing completion in accordance with the 1989 deadline set by the Swedish government. The development and implementation of the programme is described in the paper.