SRZ-1200 is an advanced light-water reactor with the world's highest levels of safety, while in conformance with Japan's new regulatory requirements based on the lessons learned from the Fukushima Daiichi Accident. The probabilities of occurrence of severe accidents with core damage and containment vessel failure are indicated by the frequencies of core damage frequency and containment failure frequency. Those values of SRZ-1200 are set to be 1/10 of the regulatory requirements. To achieve such safety levels against design-basis events, the safety design policy of the SRZ-1200 includes the enhancement of redundancy and diversity in the design-basis safety systems to prevent severe core damage and ensuring the separation of these systems to prevent simultaneous loss of their functions. This report presents the SRZ-1200 plant's basic design that achieves the world's highest levels of safety, together with concrete examples such as the enhanced redundancy by 3-train for the safety systems at the design-basis accidents, the improved safety by permanent installation of the specialized safety facility and dedicated systems to prevent a core damage.
