OECD MCCI Project: Category 2 Coolability Engineering Enhancement Tests (Rev. 1, Final Report)
- Argonne National Lab. (ANL), Argonne, IL (United States). Nuclear Engineering Division
Ex-vessel debris coolability is an important light water reactor (LWR) safety issue. For existing plants, resolution of this issue will confirm the technical basis for severe accident management guidelines (SAMGs). For new reactors, understanding this issue will help confirm the effectiveness of the design and implementation of new accident mitigation features and severe accident management design alternatives (SAMDAs). The first OECD-MCCI program conducted reactor material experiments focused on achieving the following technical objectives: i) provide confirmatory evidence and data for various cooling mechanisms through separate effect tests for severe accident model development, and ii) provide long-term 2-D coreconcrete interaction data for code assessment and improvement. Specifications for the Water-Cooled Basemat (WCB-1) integral effect test are provided. The objective was to provide prototypic data on the transient evolution and stabilization of a core melt in a generic water-cooled core catcher design for advanced plant applications. The experiment approach was to incorporate a water-cooled basemat into the coreconcrete interaction test apparatus used for the CCI tests. The basemat was composed of five parallel water channels that were instrumented to provide both local and global data on the heat transfer performance. The basemat was covered with a layer of sacrificial concrete that would be ablated by the overlying melt at the start of the experiment. Eventually, the melt would approach, and then be thermally stabilized at, the interface of the water-cooled basemat. Due to the longer timeframe associated with this type of test, it was necessary to Direct Electrically Heat (DEH) the melt to provide sufficient time for the melt to come to thermal equilibrium.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE; Nuclear Regulatory Commission (NRC); Organization for Economic Cooperation and Development (OECD) - Nuclear Energy Agency
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1177566
- Report Number(s):
- OECD/MCCI--2010-TR02; 114140
- Country of Publication:
- United States
- Language:
- English
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