Study of long-term loss of all AC power supply sources for VVER-1000/V320 in connection with application of new engineering safety features for SAMG

• In this study we presented analysis for a new SAMG approach.
• The approach is applicable for all PWR reactors from 2nd generation.
• We investigated two scenarios with total black out.
• The RELAP/MOD 3.2 computer code is used in performing the analyses.

This paper presents the results of analysis for application of a new Severe Accident Management Guideline (SAMG) approach which is specifically applied for VVER-1000/B320 reactor installations. In general, this innovative approach is fully applicable for all the pressurized water reactors from second generation. The purposes of the analysis for the new SAMG approach application are as follows:
• To represent suggestions for new engineering safety features application for SAMG strategies.
• To assess the applicability of the new engineering safety features and means for SAMG strategies in case of loss of all off-site power supply sources for VVER-1000/B320 reactor installations.
• To represent important operator actions and to analyse the effectiveness of these actions for accidents management in compliance with the new approach.
• The RELAP5/MOD3.3 computer code has been used in performing the analyses in a VVER-1000 Nuclear Power Plant (NPP) model. The input data deck for the analysis is optimized, verified and validated.