[en] In this paper the background, status and general description of severe accident management guidelines (SAMG) are explained. Especially the SAMG development and validation process for Kori-1 nuclear power plant which is the first Westinghouse type are explained. Mitigation strategy of Kori-1 SAMG is consistent with that of KSNP. Plant-specific features of Kori-1 are reflected into the Kori-1 SAMG strategies. The Kori-1 SAMG is validated with simulated severe accident scenario by Kori-1 plant operators. Transition from Emergency Operating Procedure (EOP) to SAMG, major mitigation strategies and validation process are explained