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 "SCMTriPowerAux.h"
      11             : #include "Function.h"
      12             : #include "TriSubChannelMesh.h"
      13             : #include "SCM.h"
      14             : 
      15             : registerMooseObject("SubChannelApp", SCMTriPowerAux);
      16             : 
      17             : InputParameters
      18          75 : SCMTriPowerAux::validParams()
      19             : {
      20          75 :   InputParameters params = AuxKernel::validParams();
      21          75 :   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 triangular lattice arrangement");
      24         150 :   params.addRequiredParam<PostprocessorName>(
      25             :       "power", "The postprocessor or Real to use for the total power of the subassembly [W]");
      26         150 :   params.addRequiredParam<std::string>(
      27             :       "filename", "name of radial power profile .txt file (should be a single column) [UnitLess].");
      28         150 :   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          75 :   return params;
      33           0 : }
      34             : 
      35          40 : SCMTriPowerAux::SCMTriPowerAux(const InputParameters & parameters)
      36             :   : AuxKernel(parameters),
      37          80 :     _triMesh(SCM::getConstMesh<TriSubChannelMesh>(_mesh)),
      38          40 :     _power(getPostprocessorValue("power")),
      39          40 :     _numberoflines(0),
      40         120 :     _filename(getParam<std::string>("filename")),
      41          80 :     _axial_heat_rate(getFunction("axial_heat_rate"))
      42             : {
      43          40 :   if (processor_id() > 0)
      44          10 :     return;
      45          30 :   auto n_pins = _triMesh.getNumOfPins();
      46             :   // Matrix sizing
      47          30 :   _power_dis.resize(n_pins, 1);
      48          30 :   _power_dis.setZero();
      49          30 :   _pin_power_correction.resize(n_pins, 1);
      50          30 :   _pin_power_correction.setOnes();
      51             : 
      52             :   Real vin;
      53          30 :   std::ifstream inFile;
      54             : 
      55          30 :   inFile.open(_filename);
      56          30 :   if (!inFile)
      57           0 :     mooseError(name(), ": Unable to open file: ", _filename);
      58             : 
      59         600 :   while (inFile >> vin)
      60         570 :     _numberoflines += 1;
      61             : 
      62          30 :   if (inFile.fail() && !inFile.eof())
      63           0 :     mooseError(name(), ": Non numerical input at line: ", _numberoflines);
      64             : 
      65          30 :   if (_numberoflines != n_pins)
      66           0 :     mooseError(name(), ": Radial profile file doesn't have correct size: ", n_pins);
      67          30 :   inFile.close();
      68             : 
      69          30 :   inFile.open(_filename);
      70             :   int i = 0;
      71         600 :   while (inFile >> vin)
      72             :   {
      73         570 :     _power_dis(i, 0) = vin;
      74         570 :     i++;
      75             :   }
      76          30 :   inFile.close();
      77          30 : }
      78             : 
      79             : void
      80          80 : SCMTriPowerAux::initialSetup()
      81             : {
      82          80 :   if (processor_id() > 0)
      83          20 :     return;
      84             : 
      85          60 :   auto heated_length = _triMesh.getHeatedLength();
      86          60 :   auto sum = _power_dis.sum();
      87             :   // full (100%) power of one pin [W]
      88          60 :   auto fpin_power = _power / sum;
      89             :   // actual pin power [W]
      90          60 :   _ref_power = _power_dis * fpin_power;
      91             :   // Convert the actual pin power to a linear heat rate [W/m]
      92          60 :   _ref_qprime = _ref_power / heated_length;
      93             : 
      94          60 :   auto n_pins = _triMesh.getNumOfPins();
      95          60 :   auto nz = _triMesh.getNumOfAxialCells();
      96          60 :   auto z_grid = _triMesh.getZGrid();
      97          60 :   auto unheated_length_entry = _triMesh.getHeatedLengthEntry();
      98             : 
      99          60 :   _estimate_power.resize(n_pins, 1);
     100          60 :   _estimate_power.setZero();
     101        2364 :   for (unsigned int iz = 1; iz < nz + 1; iz++)
     102             :   {
     103             :     // Compute axial location of nodes.
     104        2304 :     auto z2 = z_grid[iz];
     105        2304 :     auto z1 = z_grid[iz - 1];
     106        2304 :     Point p1(0, 0, z1 - unheated_length_entry);
     107        2304 :     Point p2(0, 0, z2 - unheated_length_entry);
     108        2304 :     auto heat1 = _axial_heat_rate.value(_t, p1);
     109        2304 :     auto heat2 = _axial_heat_rate.value(_t, p2);
     110        2304 :     if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry) &&
     111        1392 :         MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry + heated_length))
     112             :     {
     113             :       // cycle through pins
     114       22800 :       for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     115             :       {
     116             :         // Compute the height of this element.
     117       21660 :         auto dz = z2 - z1;
     118             : 
     119             :         // calculation of power for the first heated segment if nodes don't align
     120       21660 :         if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry) &&
     121             :             MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry))
     122             :         {
     123             :           heat1 = 0.0;
     124             :         }
     125             : 
     126             :         // calculation of power for the last heated segment if nodes don't align
     127       21660 :         if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry + heated_length) &&
     128             :             MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry + heated_length))
     129             :         {
     130             :           heat2 = 0.0;
     131             :         }
     132       21660 :         _estimate_power(i_pin) += _ref_qprime(i_pin) * (heat1 + heat2) * dz / 2.0;
     133             :       }
     134             :     }
     135             :   }
     136             : 
     137             :   // if a Pin has zero power (_ref_qprime(i_pin) = 0) then I need to avoid dividing by zero. I
     138             :   // divide by a wrong non-zero number which is not correct but this error doesn't mess things cause
     139             :   // _ref_qprime(i_pin) = 0.0
     140          60 :   auto total_power = 0.0;
     141        1200 :   for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     142             :   {
     143        1140 :     total_power += _estimate_power(i_pin);
     144        1140 :     if (_estimate_power(i_pin) == 0.0)
     145           0 :       _estimate_power(i_pin) = 1.0;
     146             :   }
     147             :   // We need to correct the linear power assigned to the nodes of each pin
     148             :   // so that the total power calculated  by the trapezoidal rule agrees with the power assigned by
     149             :   // the user.
     150          60 :   _pin_power_correction = _ref_power.cwiseQuotient(_estimate_power);
     151          60 :   _console << "###########################################" << std::endl;
     152          60 :   _console << "Total power estimation by Aux kernel before correction: " << total_power << " [W] "
     153          60 :            << std::endl;
     154          60 :   _console << "Aux Power correction vector :\n" << _pin_power_correction << " \n";
     155          60 : }
     156             : 
     157             : Real
     158       43685 : SCMTriPowerAux::computeValue()
     159             : {
     160       43685 :   Point p = *_current_node;
     161             :   auto heat_rate = 0.0;
     162       43685 :   auto heated_length = _triMesh.getHeatedLength();
     163       43685 :   auto unheated_length_entry = _triMesh.getHeatedLengthEntry();
     164             :   Point p1(0, 0, unheated_length_entry);
     165             :   Point P = p - p1;
     166       43685 :   auto pin_triMesh_exist = _triMesh.pinMeshExist();
     167             : 
     168             :   /// assign power to the nodes located within the heated section
     169       43685 :   if (MooseUtils::absoluteFuzzyGreaterEqual(p(2), unheated_length_entry) &&
     170       26440 :       MooseUtils::absoluteFuzzyLessEqual(p(2), unheated_length_entry + heated_length))
     171             :   {
     172       20640 :     if (pin_triMesh_exist)
     173             :     {
     174             :       // project axial heat rate on pins
     175        3420 :       auto i_pin = _triMesh.getPinIndexFromPoint(p);
     176        3420 :       return _ref_qprime(i_pin) * _pin_power_correction(i_pin) * _axial_heat_rate.value(_t, P);
     177             :     }
     178             :     else
     179             :     {
     180             :       // Determine which subchannel this point is in.
     181       17220 :       auto i_ch = _triMesh.getSubchannelIndexFromPoint(p);
     182       17220 :       auto subch_type = _triMesh.getSubchannelType(i_ch);
     183             :       // project axial heat rate on subchannels
     184             :       {
     185             :         double factor;
     186       17220 :         switch (subch_type)
     187             :         {
     188             :           case EChannelType::CENTER:
     189             :             factor = 1.0 / 6.0;
     190             :             break;
     191        4920 :           case EChannelType::EDGE:
     192             :             factor = 1.0 / 4.0;
     193        4920 :             break;
     194             :           case EChannelType::CORNER:
     195             :             factor = 1.0 / 6.0;
     196             :             break;
     197             :           default:
     198             :             return 0.0; // handle invalid subch_type if needed
     199             :         }
     200       59040 :         for (auto i_pin : _triMesh.getChannelPins(i_ch))
     201             :         {
     202       41820 :           heat_rate += factor * _ref_qprime(i_pin) * _pin_power_correction(i_pin) *
     203       41820 :                        _axial_heat_rate.value(_t, P);
     204             :         }
     205       17220 :         return heat_rate;
     206             :       }
     207             :     }
     208             :   }
     209             :   else
     210             :     return 0.0;
     211             : }