Line data    Source code

       1             : //* This file is part of the MOOSE framework
       2             : //* https://mooseframework.inl.gov
       3             : //*
       4             : //* All rights reserved, see COPYRIGHT for full restrictions
       5             : //* https://github.com/idaholab/moose/blob/master/COPYRIGHT
       6             : //*
       7             : //* Licensed under LGPL 2.1, please see LICENSE for details
       8             : //* https://www.gnu.org/licenses/lgpl-2.1.html
       9             : 
      10             : #include "SCMQuadPowerAux.h"
      11             : #include "Function.h"
      12             : #include "QuadSubChannelMesh.h"
      13             : #include "SCM.h"
      14             : 
      15             : registerMooseObject("SubChannelApp", SCMQuadPowerAux);
      16             : 
      17             : InputParameters
      18          72 : SCMQuadPowerAux::validParams()
      19             : {
      20          72 :   InputParameters params = AuxKernel::validParams();
      21          72 :   params.addClassDescription(
      22             :       "Computes axial power rate (W/m) that goes into the subchannel cells "
      23             :       "or is assigned to the fuel pins, in a quadrilateral lattice arrangement");
      24         144 :   params.addRequiredParam<PostprocessorName>(
      25             :       "power", "The postprocessor or Real to use for the total power of the subassembly [W]");
      26         144 :   params.addRequiredParam<std::string>(
      27             :       "filename", "name of radial power profile .txt file (should be a single column) [UnitLess].");
      28         144 :   params.addParam<FunctionName>("axial_heat_rate",
      29             :                                 "1.0",
      30             :                                 "user provided normalized function of axial heat rate [Unitless]. "
      31             :                                 "The integral over pin length should equal the heated length");
      32          72 :   return params;
      33           0 : }
      34             : 
      35          38 : SCMQuadPowerAux::SCMQuadPowerAux(const InputParameters & parameters)
      36             :   : AuxKernel(parameters),
      37          76 :     _quadMesh(SCM::getConstMesh<QuadSubChannelMesh>(_mesh)),
      38          38 :     _power(getPostprocessorValue("power")),
      39          38 :     _numberoflines(0),
      40         114 :     _filename(getParam<std::string>("filename")),
      41          76 :     _axial_heat_rate(getFunction("axial_heat_rate"))
      42             : {
      43          38 :   if (processor_id() > 0)
      44          10 :     return;
      45             : 
      46          28 :   auto nx = _quadMesh.getNx();
      47          28 :   auto ny = _quadMesh.getNy();
      48             :   // Matrix sizing
      49          28 :   _power_dis.resize((ny - 1) * (nx - 1), 1);
      50          28 :   _power_dis.setZero();
      51          28 :   _pin_power_correction.resize((ny - 1) * (nx - 1), 1);
      52          28 :   _pin_power_correction.setOnes();
      53             : 
      54             :   Real vin;
      55          28 :   std::ifstream inFile;
      56             : 
      57          28 :   inFile.open(_filename);
      58          28 :   if (!inFile)
      59           0 :     mooseError(name(), "unable to open file : ", _filename);
      60             : 
      61         224 :   while (inFile >> vin)
      62         196 :     _numberoflines += 1;
      63             : 
      64          28 :   if (inFile.fail() && !inFile.eof())
      65           0 :     mooseError(name(), " non numerical input at line : ", _numberoflines);
      66             : 
      67          28 :   if (_numberoflines != (ny - 1) * (nx - 1))
      68           0 :     mooseError(name(), " Radial profile file doesn't have correct size : ", (ny - 1) * (nx - 1));
      69          28 :   inFile.close();
      70             : 
      71          28 :   inFile.open(_filename);
      72             :   int i(0);
      73         224 :   while (inFile >> vin)
      74             :   {
      75         196 :     _power_dis(i, 0) = vin;
      76         196 :     i++;
      77             :   }
      78          28 :   inFile.close();
      79          28 :   _console << " Power distribution matrix :\n" << _power_dis << " \n";
      80          28 : }
      81             : 
      82             : void
      83          76 : SCMQuadPowerAux::initialSetup()
      84             : {
      85          76 :   if (processor_id() > 0)
      86          20 :     return;
      87             : 
      88          56 :   auto nx = _quadMesh.getNx();
      89          56 :   auto ny = _quadMesh.getNy();
      90          56 :   auto n_pins = (nx - 1) * (ny - 1);
      91          56 :   auto nz = _quadMesh.getNumOfAxialCells();
      92          56 :   auto z_grid = _quadMesh.getZGrid();
      93          56 :   auto heated_length = _quadMesh.getHeatedLength();
      94          56 :   auto unheated_length_entry = _quadMesh.getHeatedLengthEntry();
      95          56 :   auto sum = _power_dis.sum();
      96             : 
      97             :   // full (100%) power of one pin [W]
      98          56 :   auto fpin_power = _power / sum;
      99             :   // actual pin power [W]
     100          56 :   _ref_power = _power_dis * fpin_power;
     101             :   // Convert the actual pin power to a linear heat rate [W/m]
     102          56 :   _ref_qprime = _ref_power / heated_length;
     103             : 
     104          56 :   _estimate_power.resize(n_pins, 1);
     105          56 :   _estimate_power.setZero();
     106         760 :   for (unsigned int iz = 1; iz < nz + 1; iz++)
     107             :   {
     108             :     // Compute axial location of nodes.
     109         704 :     auto z2 = z_grid[iz];
     110         704 :     auto z1 = z_grid[iz - 1];
     111         704 :     Point p1(0, 0, z1 - unheated_length_entry);
     112         704 :     Point p2(0, 0, z2 - unheated_length_entry);
     113         704 :     auto heat1 = _axial_heat_rate.value(_t, p1);
     114         704 :     auto heat2 = _axial_heat_rate.value(_t, p2);
     115         704 :     if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry) &&
     116         512 :         MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry + heated_length))
     117             :     {
     118             :       // cycle through pins
     119        3280 :       for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     120             :       {
     121             :         // Compute the height of this element.
     122        2960 :         auto dz = z2 - z1;
     123             : 
     124             :         // calculation of power for the first heated segment if nodes don't align
     125        2960 :         if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry) &&
     126             :             MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry))
     127             :         {
     128             :           heat1 = 0.0;
     129             :         }
     130             : 
     131             :         // calculation of power for the last heated segment if nodes don't align
     132        2960 :         if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry + heated_length) &&
     133             :             MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry + heated_length))
     134             :         {
     135             :           heat2 = 0.0;
     136             :         }
     137             : 
     138        2960 :         _estimate_power(i_pin) += _ref_qprime(i_pin) * (heat1 + heat2) * dz / 2.0;
     139             :       }
     140             :     }
     141             :   }
     142             : 
     143             :   // if a Pin has zero power (_ref_qprime(i_pin) = 0) then I need to avoid dividing by zero. I
     144             :   // divide by a wrong non-zero number which is not correct but this error doesn't mess things
     145             :   // cause _ref_qprime(i_pin) = 0.0
     146          56 :   auto total_power = 0.0;
     147         448 :   for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     148             :   {
     149         392 :     total_power += _estimate_power(i_pin);
     150         392 :     if (_estimate_power(i_pin) == 0.0)
     151           0 :       _estimate_power(i_pin) = 1.0;
     152             :   }
     153             :   // We need to correct the linear power assigned to the nodes of each pin
     154             :   // so that the total power calculated  by the trapezoidal rule agrees with the power assigned
     155             :   // by the user.
     156          56 :   _pin_power_correction = _ref_power.cwiseQuotient(_estimate_power);
     157          56 :   _console << "###########################################" << std::endl;
     158          56 :   _console << "Total power estimation by Aux kernel before correction: " << total_power << " [W] "
     159          56 :            << std::endl;
     160          56 :   _console << "Aux Power correction vector :\n" << _pin_power_correction << " \n";
     161          56 : }
     162             : 
     163             : Real
     164        4020 : SCMQuadPowerAux::computeValue()
     165             : {
     166        4020 :   Point p = *_current_node;
     167        4020 :   auto heated_length = _quadMesh.getHeatedLength();
     168        4020 :   auto unheated_length_entry = _quadMesh.getHeatedLengthEntry();
     169             :   Point p1(0, 0, unheated_length_entry);
     170             :   Point P = p - p1;
     171        4020 :   auto pin_mesh_exist = _quadMesh.pinMeshExist();
     172             : 
     173             :   /// assign power to the nodes located within the heated section
     174        4020 :   if (MooseUtils::absoluteFuzzyGreaterEqual(p(2), unheated_length_entry) &&
     175        3435 :       MooseUtils::absoluteFuzzyLessEqual(p(2), unheated_length_entry + heated_length))
     176             :   {
     177        2850 :     if (pin_mesh_exist)
     178             :     {
     179             :       // project axial heat rate on pins
     180        2400 :       auto i_pin = _quadMesh.getPinIndexFromPoint(p);
     181        2400 :       return _ref_qprime(i_pin) * _pin_power_correction(i_pin) * _axial_heat_rate.value(_t, P);
     182             :     }
     183             :     else
     184             :     {
     185             :       // project axial heat rate on subchannels
     186         450 :       auto i_ch = _quadMesh.getSubchannelIndexFromPoint(p);
     187             :       // if we are adjacent to the heated part of the fuel Pin
     188             :       auto heat_rate = 0.0;
     189        1250 :       for (auto i_pin : _quadMesh.getChannelPins(i_ch))
     190             :       {
     191         800 :         heat_rate += 0.25 * _ref_qprime(i_pin) * _pin_power_correction(i_pin) *
     192         800 :                      _axial_heat_rate.value(_t, P);
     193             :       }
     194         450 :       return heat_rate;
     195             :     }
     196             :   }
     197             :   else
     198             :     return 0.0;
     199             : }