Review of the Technical Basis for Properties and Fuel Performance Data Used in HEU to LEU Conversion Analysis for U-10Mo Monolithic Alloy Fuel

Abstract

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MITR Low-Enriched Uranium Conversion Fluid-Structure Interaction Preliminary Design Verification

“…In that range, Young's modulus will vary between 67.9 and 66.8 GPa [42]. Since no plastic deformations due to FSI are expected (as confirmed later in this work), linear dependency of deflection on the Young's modulus can be assumed.…”

“…Using the properties of O-temper AA6061 is comparable in this case, which at room temperature is listed in Reference [43] as 55 MPa. This is a reasonable (and conservative) approximation for AA6061 yield strength [42]. Even without considering the irradiation-induced strengthening, the value of the highest predicted stress (~23 MPa in Case 9) is significantly below the yield strength limit.…”

“…Using the properties of O-temper AA6061 is comparable in this case, which at room temperature is listed in Reference [43] as 55 MPa. This is a reasonable (and conservative) approximation for AA6061 yield strength [42].…”

“…The assumed material properties of aluminum are listed in Table 2.7. The basis for these properties was Reference [42]. While Young's modulus decreases with the temperature, the irradiation effects are not considered in this analysis.…”

“…Young's modulus of unirradiated U-10Mo as a function of temperature is described using Eq. (2.35) of reference [42]: where E is in GPa and T is in °C. For room temperature (21°C), E is calculated to be 87. where is in 10 21 f/cm 3 .…”