東日本大震災時の福島第二原子力発電所の教訓を反映した原子力緊急マネジメントシステムの改善

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  • Nuclear Emergency Management System reflecting Lessons Learned at Fukushima Daini NPS during the 2011 Great East Japan Earthquake

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<p>Three nuclear reactors at Fukushima Daini Nuclear Power Station lost all their Ultimate Heat Sinks due to damage from the tsunami caused by the Great East Japan Earthquake on March 11, 2011. Water was injected into the reactors by alternate measures, damaged cooling systems were restored with promptly supplied substitute materials, and all the reactors were brought into a cold shutdown state within four days. Lessons learned from this experience were identified to improve emergency management, especially in the areas of strategic response planning and logistics. It was found that continuous planning activities reflecting information from plant parameters and response action results were important. Logistics were handled successfully but many difficulties were experienced. As a platform for improvement, the concept of Incident Command System was applied for the first time to a nuclear emergency management system, with specific improvement ideas such as a phased approach in response planning and common operation pictures.</p>

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