| Medium.ThermodynamicState | liquidState (from Drum) | | Thermodynamic state of the liquid |
| Medium.ThermodynamicState | vapourState (from Drum) | | Thermodynamic state of the vapour |
| Medium.SaturationProperties | sat (from Drum) | | |
| ThermoPower.System | system (from Drum) | | System wide properties |
| SI.Volume | Vv (from Drum) | | Volume occupied by the vapour |
| SI.Volume | Vl (from Drum) | | Volume occupied by the liquid |
| Medium.AbsolutePressure | p (from Drum) | | Surface pressure |
| SI.SpecificEnthalpy | hl (from Drum) | | Liquid specific enthalpy |
| SI.SpecificEnthalpy | hv (from Drum) | | Vapour specific enthalpy |
| SI.SpecificEnthalpy | hrv (from Drum) | | Specific enthalpy of vapour from the risers after separation |
| SI.SpecificEnthalpy | hrl (from Drum) | | Specific enthalpy of liquid from the risers after separation |
| SI.SpecificEnthalpy | hls (from Drum) | | Specific enthalpy of saturated liquid |
| SI.SpecificEnthalpy | hvs (from Drum) | | Specific enthalpy of saturated vapour |
| SI.SpecificEnthalpy | hf (from Drum) | | Specific enthalpy of feedwater |
| SI.SpecificEnthalpy | hd (from Drum) | | Specific enthalpy of liquid to the downcomers |
| SI.SpecificEnthalpy | hvout (from Drum) | | Specific enthalpy of steam at the outlet |
| SI.SpecificEnthalpy | hr (from Drum) | | Specific enthalpy of fluid from the risers |
| Medium.MassFlowRate | wf (from Drum) | | Mass flowrate of feedwater |
| Medium.MassFlowRate | wd (from Drum) | | Mass flowrate to the downcomers |
| Medium.MassFlowRate | wb (from Drum) | | Mass flowrate of blowdown |
| Medium.MassFlowRate | wr (from Drum) | | Mass flowrate from the risers |
| Medium.MassFlowRate | wrl (from Drum) | | Mass flowrate of liquid from the risers |
| Medium.MassFlowRate | wrv (from Drum) | | Mass flowrate of vapour from the risers |
| Medium.MassFlowRate | wv (from Drum) | | Mass flowrate of steam at the outlet |
| Medium.MassFlowRate | wc (from Drum) | | Mass flowrate of bulk condensation |
| Medium.MassFlowRate | wcs (from Drum) | | Mass flowrate of surface condensation |
| Medium.MassFlowRate | wev (from Drum) | | Mass flowrate of bulk evaporation |
| Medium.Temperature | Tl (from Drum) | | Liquid temperature |
| Medium.Temperature | Tv (from Drum) | | Vapour temperature |
| Units.AbsoluteTemperature | Tm (from Drum) | | Wall temperature |
| Medium.Temperature | Ts (from Drum) | | Saturated water temperature |
| SI.Power | Qmv (from Drum) | | Heat flow from the wall to the vapour |
| SI.Power | Qvl (from Drum) | | Heat flow from the vapour to the liquid |
| SI.Power | Qml (from Drum) | | Heat flow from the wall to the liquid |
| SI.Power | Qme (from Drum) | | Heat flow from the wall to the atmosphere |
| SI.Mass | Ml (from Drum) | | Liquid mass |
| SI.Mass | Mv (from Drum) | | Vapour mass |
| SI.Energy | El (from Drum) | | Liquid internal energy |
| SI.Energy | Ev (from Drum) | | Vapour internal energy |
| Units.LiquidDensity | rhol (from Drum) | | Liquid density |
| Units.GasDensity | rhov (from Drum) | | Vapour density |
| SI.PerUnit | xl (from Drum) | | Mass fraction of vapour in the liquid volume |
| SI.PerUnit | xv (from Drum) | | Steam quality in the vapour volume |
| SI.PerUnit | xr (from Drum) | | Steam quality of the fluid from the risers |
| SI.PerUnit | xrv (from Drum) | | Steam quality of the separated steam from the risers |
| Real | gml (from Drum) | | Total heat transfer coefficient (wall-liquid) |
| Real | gmv (from Drum) | | Total heat transfer coefficient (wall-vapour) |
| Real | a (from Drum) | | |
| SI.Length | y (from Drum) | | Level (referred to the centreline) |
| SI.Area | Aml (from Drum) | | Surface of the wall-liquid interface |
| SI.Area | Amv (from Drum) | | Surface of the wall-vapour interface |
| SI.Area | Asup (from Drum) | | Surface of the liquid-vapour interface |
| SI.Area | Aext (from Drum) | | External drum surface |
