KEPCO conducts a materiality test in accordance with the principles of the Global Reporting initiative(GRI), which is a guideline for global sustainability reporting, and reports on the topics identified as material issues. "Material Topic" reflects the impact on KEPCO's business and the interests of its stakeholders. KEPCO reports major activities and achievements regarding issues identified through the materiality test throughout the report, and KEPCO continues to monitor and manage the material topics as well as core issues that could potentially affect the management activities.