OECD MCCI Project 2-D Core Concrete Interaction (CCI) Tests. CCI-5 Test Plan. Rev. 1, Final
- 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 for various cooling mechanisms through separate effect tests and data for severe accident code model development, and (ii) provide longer-term two-dimensional core-concrete interaction data for code assessment and improvement. Debris cooling mechanisms investigated as part of the first MCCI program included: (i) water ingression through cracks/fissures in the core debris, (ii) melt eruption caused by gas sparging (volcanic-type event), and (iii) large-scale crust mechanical failure leading to renewed bulk cooling. The results of this testing and associated analysis provided an envelope (principally determined by melt depth) for debris coolability. However, this envelope does not encompass the full range of melt depths that are calculated for all plant accident sequences. Cooling augmentation by additional means may be needed at the late stage to assure coolability for new reactor designs as well as for various accident sequences for existing reactors. In addition, the results of the CCI tests showed that lateral/axial power split is a function of concrete type. However, the first program produced limited data sets for code assessment. In light of significant differences in ablation behavior for different concrete types, additional data will be useful in reducing uncertainties and gaining confidence in code predictions. The objective of this test plan is to document the final CCI-5 test design in sufficient detail so that pretest analyses may be conducted by member organizations.
- Research Organization:
- Argonne National Lab. (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:
- 1177563
- Report Number(s):
- OECD/MCCI-2008-TR03; 114087
- Country of Publication:
- United States
- Language:
- English
Similar Records
OECD MCCI Project: 2-D Core Concrete Interaction (CCI) Tests: CCI-5 Quick Look Data Report
OECD MCCI Project: 2-D Core Concrete Interaction (CCI) Tests CCI-5 Data Report (Rev. 1)