The effectiveness of a management system can be monitored and measured to confirm the ability of its processes to achieve the intended results with regards to safety by an assessment of its operational performance. Operational Safety Performance Indicators, also known as SPI, help an organization define and measure a progress with regards to its safety activity goals. The elements of SPI are quantifiable measurements that reflect the critical success factors of an organizational safety. The safety activities in HANARO have been continuously conducted to enhance its safe operation. HANARO has made an effort to select operational safety performance indicators which are specific to a research reactor operation and its utilization. The measurable elements of HANARO’s operational safety performance evaluation consist of 4 safety attributes, 10 overall indicators, 22 strategic indicators and 42 specific indicators. These specific indicators can cover the most appropriate parameters to monitor the safety attributes of the operation and utilization in HANARO. Through reviewing these indicators, we can obtain information on the plant’s safety status and the trends of the safety parameters. This paper describes the operational safety performance indicators for HANARO which implements the IAEA’s approach for a safety performance monitoring.