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Current Approaches to the Analysis of Design Extension Conditions with Core Melting for New Nuclear Power Plants


English IAEA-TECDOC-1982 ¦ 978-92-0-133921-8

168 pages ¦ 10 figures ¦ € 18.00 ¦ Date published: 2021

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The focus of this publication is on collecting current practices in Member States related to design extension conditions (DECs) with core melting. The information provided is based on the feedback from technical experts from Canada, France, Finland, India, the Islamic Republic of Iran, the Russian Federation, and the United States of America. There is, however, still no common understanding of DECs due to the complexity of phenomena and insufficient experimental data. This publication identifies current approaches of IAEA Member States with active nuclear power programmes and discusses the regulatory perspective and technical rationale. It attempts to find common practices and possible areas for harmonization of the main rules related to the analysis of DECs with core melting for new water cooled reactors, including their selection for the safety demonstration.

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Current, Approach, Analysis, Design, Extension, Condition, Current Approach, DEC, Design Extension Condition, Core Melting, NPP, Nuclear Power Plant, Current Practice, Member State, Technical Expert, Experimental Data, Nuclear Power Programme, Regulatory Perspective, Common Practice, WCR, Water Cooled Reactor, Safety, Safety Demonstration, Safety Standard, Safe State, Methodology, Computational Tool, Computer Code, Acceptance Criteria, Documentation, DBA, Design Basis Accident, DSA, Deterministic Safety Analysis, LOCA, Loss of Coolant Accident, PSA, Probabilistic Safety Assessment, Accident, Severe Accident, SBO, Station Blackout, SAR, Safety Analysis Report

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