Summary of corrosion loop test results for the Institut Laue-Langevin cladding material

摘要

Corrosion testing of Grenoble Institut Laue-Langevin (ILL) reactor fuel cladding material is briefly summarized. The test specimen was fabricated from Al-Ni-Fe alloy (VDM-4194). Chemical analysis of this alloy compared well with the supplied composition report and average values for the ILL cladding and for a standard 6061 Al alloy. For the most direct comparison with the data base of oxidation results for 6061 Al, moderately aggressive thermal-hydraulic conditions and a coolant pH of 5 were chosen for this test. Further, in an attempt to induce spallation (again for comparison with behavior of 6061), the power to the test section was increased twice during the duration of the test while holding other control parameters as constant as possible. Results of destructive examination of the sample were compared with correlation calculations. In general, the product film growth rates correlated extremely well, indicating that the general growth behavior of the alloy closely follows that of 6061 Al for this range of thermal-hydraulic conditions. 8 figs., 2 tabs.