EBR-II SHRT

[kyriv1980]

Model Description

SCM is a subchannel code within the Multiphysics Object-Oriented Simulation Environment (MOOSE) developed at the Idaho National Laboratory (INL). SCM was initially designed to model flows in water-cooled, square-lattice, bare subassemblies. Its capability has been extended to model flows in liquid-metal-cooled, triangular-lattice, wire-wrapped subassemblies. To ensure the accuracy of SCM in predicting the behavior of liquid sodium-cooled reactors, the code was validated by comparing calculations with experimental data, obtained from the experimental breeder reactor (EBR-II), Shutdown Heat Removal Tests (SHRT) 17 and 45R.

Information on these tests can be found at : https://publications.anl.gov/anlpubs/2012/06/73647.pdf

The steady state calculation at the beginning of the transients was validated using temperature measurements taken at different axial elevations in the instrumented subassembly XX09. The validation exercise was performed in successive stages. First, a comparison between the measured temperature profiles and standalone PronghornSC simulations using a uniform pin power profile was made. The pin power profile was then refined using a Serpent-2 model of the reactor core. Finally, the radial temperature profile was further corrected considering the inter-assembly heat transfer. A Pronghorn Finite-Volume (FV) thermal hydraulic simulation of XX09 and its six neighboring subassemblies; calculated the heat flux on the inner duct surface of the XX09 subassembly to inform the SCM model. Last, a transient validation calculated the peak temperature evolution during the SHRT tests.

This work has been published at: https://www.sciencedirect.com/science/article/pii/S0029549323006325?ref=pdf_download&fr=RR-2&rr=8f00d0a6c83a8386

Project description

This PR uploads the SCM input files that model the EBR, SHRT tests:

• Steady state:
  XX09_SCM_SS17.i for the steady state simulation that converges to the initial condition before the SHRT-17 transient.
  XX09_SCM_SS45R.i for the steady state simulation that converges to the initial condition before the SHRT-45R transient.

• Transient:
  XX09_SCM_TR17.i for the SHRT-17 transient.
  XX09_SCM_TR45R.i for the SHRT-45R transient.

Additional files that provide the BCs of the transients :

• massflow_SHRT17.csv
• massflow_SHRT17.csv
• power_history_SHRT17.csv
• power_history_SHRT45.csv

Additional file that provide the fuel-pin radial power profile:

• pin_power_profile61.txt
• pin_power_profile61_uniform.txt

Impact

This model can be used to validate SCM using the EBR-II SHRT tests, which demonstrates that SCM can accurately simulate GEN-IV SFR's.