Concept of an inherently-safe high temperature gas-cooled reactor

摘要: As the challenge to ensure no harmful release of radioactive materials at accidents by deterministic approach instead satisfy acceptance criteria or safety goal for risk probabilistic approach, new concept advanced reactor, an inherently-safe high temperature gas-cooled is proposed based on experience operation actual High Temperature Gas-cooled Reactor (HTGR) in Japan, Engineering Test (HTTR), and design commercial plant (GTHTR300), utilizing inherent features HTGR (i.e., physical phenomena). The philosophy analysis radiological consequences determined as confinement assured only without engineered features, AC power prompt actions personnel if extension conditions occur. Inherent prevent loss degradation function are identified. It not apply evaluation because fail mitigation accidents. Consequently, there event sequences occur concept. future R&D items described this paper.