Thermal properties for the thermal-hydraulics analyses of the BR2 maximum nominal heat flux.

Loss-of-Flow and Loss-of-Pressure Simulations of the BR2 Research Reactor with HEU and LEU Fuel

“…The moody diagram shows that even an order of magnitude increase in surface roughness has little impact on the friction factor for the Reynolds numbers typical of the BR2 primary system and reactor vessel. Table 1 provides a summary of the relevant material properties for use in the RELAP5 model [8]. The fuel properties for the high heat flux fuel assembly (average burnup = 16%) and long irradiated beryllium were used in the analyses presented in this document 4 .…”

“…For the current model, these have been consolidated into a single equivalent heat exchanger and piping. The parameters for this system were obtained from previous RELAP5 models provided to ANL (Table 2) 8 . An average of the measured pressure drop per heat exchanger was found to be 77 kPa for a primary system flow rate of 1878 kg/s.…”

“…Personal communication with Emre Sikik 9/21/2015 8. Previous versions of the BR2 input model can be found in the ANL archive of the BR2 conversion files.…”

RHF RELAP5 model and preliminary loss-of-offsite-power simulation results for LEU conversion

“…Properties for the materials 1-4 were obtained from Ref. [8]. The properties for the cladding material, AlFeNi, were obtained from [6].…”

RELAP5 Model Description and Validation for the BR2 Loss-of-Flow Experiments

“…ses presented in this document. Table 1 provides a summary of the material properties for use in the RELAP5 model [5]. The fresh HEU fuel (UAl x -Al) and long irradiated beryllium properties were used in the analyses presented in this document.…”