The standard specifies requirements for the handling of fissile materials inside of nuclear facilities. It is not valid for nuclear power plants. The requirements concern technical criteria and recommendations to guarantee criticality safety during processing and handling of fissile materials.
DIN 25403-1:1991 history
2013DIN 25403-1:2013-12 Criticality safety in processing and handling of fissile materials - Part 1: Principles
2013DIN 25403-1:2013 Criticality safety in processing and handling of fissile materials - Part 1: Principles
2007DIN 25403-1:2007 Criticality safety in processing and handling of fissile materials - Part 1: Principles
1991DIN 25403-1:1991 Criticality safety in processing and handling of fissile materials; principles