| Integer | nSep | 3 | number of separators |
| Real | frac_gasSplit | 0.5 | Fraction of gas which goes to bubbler vs holdup |
| Real | Vratio_sep_SG | 2 | # of volumes of salt for every volume of gas removed in each separator |
| SI.VolumeFlowRate | V_flow_sep_salt | from_gpm(10) | Volume flow rate of salt removed in each separator |
| SI.VolumeFlowRate | V_flow_sep_He | V_flow_sep_salt/Vratio_sep_SG | Volume flow rate of Helium removed in each separator |
| SI.VolumeFlowRate | V_flow_sep_He_total | nSep*V_flow_sep_He | Total volume flow rate of Helium removed from all separators |
| SI.VolumeFlowRate | V_flow_sep_salt_total | nSep*V_flow_sep_salt | Total volume flow rate of salt removed from all separators |
| SI.Temperature | T_sep_ref | from_degF(1250) | Reference temperature of salt removed at separator |
| SI.Pressure | p_sep_ref | from_psi(180) | Reference pressure of salt removed at separator |
| SI.Density | d_sep_ref | Medium_OffGas.density_pT(p_sep_ref, T_sep_ref) | Reference density at separator |
| SI.Temperature | T_drainTank | from_degF(1000) | Reference temperature of drain tank |
| SI.Pressure | p_drainTank | from_psi(40 + 14.7) | Drain tank gas volume pressure |
| SI.MolarMass | MM_He | 0.004 | Molar mass of helium |
| SI.MolarFlowRate | n_flow_sep_He | V_flow_sep_He*p_sep_ref/(Modelica.Constants.R*T_sep_ref) | Molar flow rate of He from each separator |
| SI.MassFlowRate | m_flow_sep_He | n_flow_sep_He*MM_He | Mass flow rate of helium from each separator |
| SI.MolarFlowRate | n_flow_sep_He_total | nSep*n_flow_sep_He | Total molar flow rate of He from all separators |
| SI.MassFlowRate | m_flow_sep_He_total | nSep*m_flow_sep_He | Total mass flow rate of helium from all separators |
| SI.MassFlowRate | m_flow_He_bubbler | 0.5*m_flow_sep_He_total | Total mass flow rate of helium to bubbler |
| SI.MassFlowRate | m_flow_He_adsorber | 0.5*m_flow_sep_He_total | Total mass flow rate of helium to adsorber bed |
| SI.Time | delay_drainTank | from_hr(6) | Gas holdup time in drain tank |
| SI.Time | delay_charcoalBed | from_day(90) | Gas holdup time in charcoal bed based on Xe-135 |
| SI.Volume | volume_drainTank_gasdelay | delay_drainTank*m_flow_sep_He_total/Medium_OffGas.density_pT(p_drainTank, T_drainTank) | volume of gas at specified hold up time |
| SI.Density | d_carbon | from_lb_feet3(30) | Density of charcoal bed |
| SI.SpecificHeatCapacity | cp_carbon | from_btu_lbdegF(0.3) | Specific heat capacit of charcoal bed |
| SI.Temperature | T_carbon | from_degF(340) | Average temperature of charcoal bed |
| SI.Temperature | T_carbon_wall | from_degF(250) | Average temperature of charcoal bed duct wall |
| SI.PressureDifference | dp_carbon | from_psi(5) | Approximate pressure drop across charcoal bed |
| Integer | nThimbles | 360 | # of thimbles in drain tank |
| SI.Length | D_thimbles | from_inch(3.5) | outer diameter of thimbles in drain tank |
| SI.Length | th_thimbles | from_inch(0.12) | 3in sch 10 outer tube thickness |
| SI.Length | length_thimbles | from_inch(204) | length of thimbles in drain tank |
| SI.Length | D_inner_thimbles | from_inch(2.375) | outer diameter of inner thimbles pipe in drain tank |
| SI.Length | th_inner_thimbles | from_inch(0.154) | 2in sch 40 outer tube thickness |
| SI.Length | D_drainTank_inner | from_inch(130) | Inner diameter of drain tank |
| SI.Length | length_drainTank_inner | from_inch(210) | Approximate inner vertical length of drain tank |
| SI.Area | crossArea_thimbles_outer | 0.25*pi*D_thimbles^2 | Outer cross-sectional area of each thimble |
| SI.Area | crossArea_drainTank_innerEmpty | 0.25*pi*D_drainTank_inner^2 | Inner cross-sectional area of an empty drain tank |
| SI.Area | crossArea_drainTank_inner | crossArea_drainTank_innerEmpty - crossArea_thimbles_outer*nThimbles | Inner cross-sectional area of drain tank with area of thimbles removed |
| SI.Volume | volume_thimble_outer | crossArea_thimbles_outer*length_thimbles | Outer volume of each thimble |
| SI.Volume | volume_drainTank_innerEmpty | crossArea_drainTank_innerEmpty*length_drainTank_inner | Inner volume of an empty drain tank |
| SI.Volume | volume_drainTank_inner | volume_drainTank_innerEmpty - volume_thimble_outer*nThimbles | Inner volume of drain tank with volume of thimbles removed |
| SI.Temperature | T_hot_dracs | from_degF(532) | hot temperature of decay heat removal system |
| SI.Temperature | T_cold_dracs | from_degF(450) | cold temp |
| SI.SpecificEnthalpy | h_cold_dracs | Medium_DRACS.specificEnthalpy_pT(1e5, T_cold_dracs) | cold enthalpy |
| SI.VolumeFlowRate | V_flow_dracs | from_gpm(2800) | volume flow rate |
| SI.Density | d_hot_dracs | Medium_DRACS.density_pT(1e5, T_hot_dracs) | hot density |
| SI.Density | d_cold_dracs | Medium_DRACS.density_pT(1e5, T_cold_dracs) | cold density |
| SI.Density | d_avg_dracs | 0.5*(d_hot_dracs + d_cold_dracs) | avg density |
| SI.MassFlowRate | m_flow_hot_dracs | V_flow_dracs*d_hot_dracs | mass flow rate based on hot density |
| SI.MassFlowRate | m_flow_cold_dracs | V_flow_dracs*d_cold_dracs | mass flow rate based on cold density |
| SI.MassFlowRate | m_flow_avg_dracs | V_flow_dracs*d_avg_dracs | mass flow rate based on average density |
| SI.Velocity | v_pipeToFrom_DRACS | 2 | Design velocity for pipe to and from draintank and water tank |
| SI.Length | D_pipeToFrom_DRACS | sqrt(4*V_flow_dracs/pi/v_pipeToFrom_DRACS) | diameter of pipe to and from draintank and water tank |
| SI.Length | length_pipeToFrom_DRACS | from_feet(60) | length of pipe to and from draintank and water tank |
| Real | nWaterTanks | 3 | |
| Real | nThimbles_waterTank | 576 | # of thimbles per water tank |
| SI.Length | level_nominal_waterTank | from_feet(6) | nominal level of water tank |
| SI.Area | crossArea_waterTank | from_feet2(25*25) | cross area of water tank |
| SI.Length | length_thimbles_waterTank | from_feet(25) | length of thimbles in water tank |
| SI.Temperature | T_inlet_waterTank | from_degF(80) | inlet temperature |
| SI.Temperature | T_outlet_waterTank | from_degF(100) | outlet temp |
| SI.VolumeFlowRate | V_flow_waterTank | from_gpm(39) | volume flow rate |
| SI.Density | d_inlet_waterTank | Medium_WaterTank.density_pT(1e5, T_inlet_waterTank) | inlet density |
| SI.Density | d_outlet_waterTank | Medium_WaterTank.density_pT(1e5, T_outlet_waterTank) | outlet density |
| SI.Density | d_avg_waterTank | 0.5*(d_inlet_waterTank + d_outlet_waterTank) | avg density |
| SI.MassFlowRate | m_flow_inlet_waterTank | V_flow_waterTank*d_inlet_waterTank | mass flow rate based on inlet density |
| SI.MassFlowRate | m_flow_outlet_waterTank | V_flow_waterTank*d_outlet_waterTank | mass flow rate based on outlet density |
| SI.MassFlowRate | m_flow_avg_waterTank | V_flow_waterTank*d_avg_waterTank | mass flow rate based on average density |
Medium_OffGas