Explosion protection in nuclear power plants with light water reactors (General and case-dpecific requirements). Version 2022-11

In accordance with SiAnf, Annex 3, protective measures must be provided to counter fires and explosions in a nuclear power plant. Fire protection in Nuclear Power Plants is dealt with in the safety standard series KTA 2101 and is, therefore, not within the scope of the present safety standard. The present safety standard presumes that the German Industrial Safety Ordinance (BetrSichV) and the Hazardous Substances Ordinance (GefStoffV) together with the associated technical standards (TRBS and TRGS) are observed. Furthermore, it is assumed that the regulations of the German Social Accident Insurance (DGUV), and that standard DIN EN IEC 60079-10-1 as well as other regulations under public law are observed. Detailed information on the zone-classification of potentially explosive areas are contained in the collection of examples of standard DGUV 113-001. Exceptions are admissible in well-founded cases. To meet the objectives of explosion protection in nuclear power plants with light water reactors, the present safety standard specifies such explosion protection measures that will help to sustain the safety-related tasks of plant components including the structural components under consideration that the precautionary measures under para. (2) are taken. In this context, technical and administrative measures are specified. The extent and quality of these measures as well as the associated inspection effort are dependent on the importance of the explosion protection with regard to achieving the protective goals and radiological safety goals in accordance with SiAnf, Secs. 2.3 and 2.5.