pyMAISE.datasets.load_BWR

pyMAISE.datasets.load_BWR()[source]

Load BWR Micro Core data. This data consists of 2000 samples of 9 inputs:

  • PSZ: Fuel bundle region Power Shaping Zone (PSZ),

  • DOM: Fuel bundle region Dominant zone (DOM),

  • vanA: Fuel bundle region vanishing zone A (VANA),

  • vanB: Fuel bundle region vanishing zone B (VANB),

  • subcool: Represents moderator inlet conditions. Core inlet subcooling is interpreted to be at the steam dome pressure (i.e., not core-averaged pressure). The input value for subcooling will automatically be increased to account for this fact. (Btu/lb),

  • CRD: Defines the position of all control rod groups (banks),

  • flow_rate: Defines essential global design data for rated coolant mass flux for the active core, \(\frac{kg}{(cm^{2}-hr)}\). Coolant mass flux equals active core flow divided by core cross-section area. The core cross-section area is DXA 2 times the number of assemblies,

  • power_density: Defines essential global design data for rated power density using cold dimensions, \((\frac{kw}{liter})\),

  • VFNGAP: Defines the ratio of narrow water gap width to the sum of the narrow and wide water gap widths,

with five outputs:

  • K-eff: Reactivity coefficient k-effective, the effective neutron multiplication factor,

  • Max3Pin: Maximum planar-averaged pin power peaking factor,

  • Max4Pin: maximum pin-power peaking factor, \(F_{q}\), (which includes axial intranodal peaking),

  • F-delta-H: Ratio of max-to-average enthalpy rise in a channel,

  • Max-Fxy: Maximum radial pin-power peaking factor,

This data set was constructed through uniform and normal sampling of the 9 input parameters for a boiling water reactor (BWR) micro-core. These samples were then used to solve for reactor characteristic changes in heat distribution and neutron flux. This BWR micro-core consists of 4 radially and axially heterogeneous assemblies of the same type constructed in a 2x2 grid with a control-blade placed in the center. A single assembly was broken into seven zones where each zone’s 2D radial cross-sectional information was constructed using CASMO-4. These cross sectional libraries were then processed through CMSLINK for SIMULATE-3 to interpret. The core geometry and physics were implemented and modeled using SIMULATE-3.

Returns:

  • data (xarray.DataArray) – Raw BWR Micro Reactor data.

  • inputs (xarray.DataArray) – 9 inputs.

  • outputs (xarray.DataArray) – 5 outputs.