Abstract
Core Degradation and material migration research is one of the key steps in severe accident research. A review of core degradation and melting materials immigration research in light water reactor is important to encourage relevant research. Relevant experiments and numerical analyses are reviewed in this paper. There have only been a few experiments on severe accidents performed due to their high cost. They focus on different aspects of core degradation and material migration, including early stage and late stage accidents in both PWRs and BWRs. All the current experimental data should be fully utilized due to the limited data available. On the other hand, the data available from numerical analyses for severe accidents is very extensive. There are already many systemic severe accident codes developed by different organizations. They provide severe accident sequences analysis, severe accident prediction and are also important in security policy formulation. At the end of this paper, relevant work in Xi’an Jiaotong University are introduced and these works are expected to reveal parts of severe accident relevant research in China.
Highlights
Since the inception of industrial nuclear power production there have been several severe accidents that have brought drastic damage to local populations and slowed down the advancement of the nuclear industry all over the world
Reactor Core Degradation Research Review et al, 1997; Repetto et al, 2003; Van Dorsselaere et al, 2006), while other experiments deal with separate effects testing of core degradation and material migration phenomenon (Thomsen, 1998; Steinbrück et al, 2010)
The Chernobyl disaster occurred in one of the four Reaktor Bolshoy Moshchnosty Kanalny (RBMK) reactors in Ukraine, Soviet Union on April 26, 1986 (Howard, 2008). This accident originated from a technology experiment in Chernobyl nuclear power plant which tries to test the available length of a spinning turbine of the electrical power to certain nuclear power plant system (Howieson and Snell, 1987; Sehgal, 2012)
Summary
Since the inception of industrial nuclear power production there have been several severe accidents that have brought drastic damage to local populations and slowed down the advancement of the nuclear industry all over the world. Core degradation and material migration research is one of the key areas in severe accident research (Hofmann, 1999). It is a multi-phase, multi-component complex physical chemical process, which is hard to accurately predict (Wang et al, 2014a). Three nuclear severe accidents are overviewed: Fukushima, Chernobyl, and Three Mile Island (Rees, 2009; Morino et al, 2011; Petryna, 2013) These accidents caused a large amount of damage to local populations and remind people to respect the severity of their occurrences (Matzke, 1982; Simmons, 2013). Some of the experiments focus directly on core degradation and material migration phenomenon
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