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 "SCMTriPowerIC.h"
      11             : #include "Function.h"
      12             : #include "TriSubChannelMesh.h"
      13             : 
      14             : registerMooseObject("SubChannelApp", SCMTriPowerIC);
      15             : registerMooseObjectRenamed("SubChannelApp", TriPowerIC, "06/30/2025 24:00", SCMTriPowerIC);
      16             : 
      17             : InputParameters
      18         348 : SCMTriPowerIC::validParams()
      19             : {
      20         348 :   InputParameters params = TriSubChannelBaseIC::validParams();
      21         348 :   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         696 :   params.addRequiredParam<PostprocessorName>(
      25             :       "power", "The postprocessor or Real to use for the total power of the subassembly [W]");
      26         696 :   params.addRequiredParam<std::string>(
      27             :       "filename", "name of radial power profile .txt file (should be a single column) [UnitLess].");
      28         696 :   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         348 :   return params;
      33           0 : }
      34             : 
      35         195 : SCMTriPowerIC::SCMTriPowerIC(const InputParameters & params)
      36             :   : TriSubChannelBaseIC(params),
      37         195 :     _power(getPostprocessorValue("power")),
      38         195 :     _numberoflines(0),
      39         585 :     _filename(getParam<std::string>("filename")),
      40         390 :     _axial_heat_rate(getFunction("axial_heat_rate"))
      41             : {
      42         195 :   if (processor_id() > 0)
      43          65 :     return;
      44             : 
      45         130 :   auto n_pins = _mesh.getNumOfPins();
      46         130 :   auto heated_length = _mesh.getHeatedLength();
      47             : 
      48         130 :   _power_dis.resize(n_pins, 1);
      49         130 :   _power_dis.setZero();
      50         130 :   _pin_power_correction.resize(n_pins, 1);
      51         130 :   _pin_power_correction.setOnes();
      52             : 
      53             :   Real vin;
      54         130 :   std::ifstream inFile;
      55             : 
      56         130 :   inFile.open(_filename);
      57         130 :   if (!inFile)
      58           0 :     mooseError(name(), ": Unable to open file: ", _filename);
      59             : 
      60        4496 :   while (inFile >> vin)
      61        4366 :     _numberoflines += 1;
      62             : 
      63         130 :   if (inFile.fail() && !inFile.eof())
      64           0 :     mooseError(name(), ": Non numerical input at line: ", _numberoflines);
      65             : 
      66         130 :   if (_numberoflines != n_pins)
      67           0 :     mooseError(name(), ": Radial profile file doesn't have correct size: ", n_pins);
      68         130 :   inFile.close();
      69             : 
      70         130 :   inFile.open(_filename);
      71             :   int i = 0;
      72        4496 :   while (inFile >> vin)
      73             :   {
      74        4366 :     _power_dis(i, 0) = vin;
      75        4366 :     i++;
      76             :   }
      77         130 :   inFile.close();
      78             : 
      79         130 :   auto sum = _power_dis.sum();
      80             :   // full (100%) power of one pin [W]
      81         130 :   auto fpin_power = _power / sum;
      82             :   // actual pin power [W]
      83         130 :   _ref_power = _power_dis * fpin_power;
      84             :   // Convert the actual pin power to a linear heat rate [W/m]
      85         130 :   _ref_qprime = _ref_power / heated_length;
      86         130 : }
      87             : 
      88             : void
      89         195 : SCMTriPowerIC::initialSetup()
      90             : {
      91         195 :   if (processor_id() > 0)
      92          65 :     return;
      93         130 :   auto n_pins = _mesh.getNumOfPins();
      94         130 :   auto nz = _mesh.getNumOfAxialCells();
      95         130 :   auto z_grid = _mesh.getZGrid();
      96         130 :   auto heated_length = _mesh.getHeatedLength();
      97         130 :   auto unheated_length_entry = _mesh.getHeatedLengthEntry();
      98             : 
      99         130 :   _estimate_power.resize(n_pins, 1);
     100         130 :   _estimate_power.setZero();
     101        3734 :   for (unsigned int iz = 1; iz < nz + 1; iz++)
     102             :   {
     103             :     // Compute axial location of nodes.
     104        3604 :     auto z2 = z_grid[iz];
     105        3604 :     auto z1 = z_grid[iz - 1];
     106        3604 :     Point p1(0, 0, z1 - unheated_length_entry);
     107        3604 :     Point p2(0, 0, z2 - unheated_length_entry);
     108        3604 :     auto heat1 = _axial_heat_rate.value(_t, p1);
     109        3604 :     auto heat2 = _axial_heat_rate.value(_t, p2);
     110        3604 :     if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry) &&
     111        2780 :         MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry + heated_length))
     112             :     {
     113             :       // cycle through pins
     114       66908 :       for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     115             :       {
     116             :         // Compute the height of this element.
     117       64720 :         auto dz = z2 - z1;
     118             : 
     119             :         // calculation of power for the first heated segment if nodes don't align
     120       64720 :         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       64720 :         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       64720 :         _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         130 :   auto total_power = 0.0;
     141        4496 :   for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     142             :   {
     143        4366 :     total_power += _estimate_power(i_pin);
     144        4366 :     if (_estimate_power(i_pin) == 0.0)
     145         344 :       _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         130 :   _pin_power_correction = _ref_power.cwiseQuotient(_estimate_power);
     151         130 :   _console << "###########################################" << std::endl;
     152         130 :   _console << "Total power estimation by IC kernel before correction: " << total_power << " [W] "
     153         130 :            << std::endl;
     154         130 :   _console << "IC Power correction vector :\n" << _pin_power_correction << " \n";
     155         130 : }
     156             : 
     157             : Real
     158      258876 : SCMTriPowerIC::value(const Point & p)
     159             : {
     160             :   auto heat_rate = 0.0;
     161      258876 :   auto heated_length = _mesh.getHeatedLength();
     162      258876 :   auto unheated_length_entry = _mesh.getHeatedLengthEntry();
     163             :   Point p1(0, 0, unheated_length_entry);
     164             :   Point P = p - p1;
     165      258876 :   auto pin_mesh_exist = _mesh.pinMeshExist();
     166             : 
     167             :   /// assign power to the nodes located inside the heated section
     168      258876 :   if (MooseUtils::absoluteFuzzyGreaterEqual(p(2), unheated_length_entry) &&
     169      212382 :       MooseUtils::absoluteFuzzyLessEqual(p(2), unheated_length_entry + heated_length))
     170             :   {
     171      167766 :     if (pin_mesh_exist)
     172             :     {
     173             :       // project axial heat rate on pins
     174       52278 :       auto i_pin = _mesh.getPinIndexFromPoint(p);
     175       52278 :       return _ref_qprime(i_pin) * _pin_power_correction(i_pin) * _axial_heat_rate.value(_t, P);
     176             :     }
     177             :     else
     178             :     {
     179             :       // Determine which subchannel this point is in.
     180      115488 :       auto i_ch = _mesh.getSubchannelIndexFromPoint(p);
     181      115488 :       auto subch_type = _mesh.getSubchannelType(i_ch);
     182             :       // project axial heat rate on subchannels
     183             :       {
     184             :         double factor;
     185      115488 :         switch (subch_type)
     186             :         {
     187             :           case EChannelType::CENTER:
     188             :             factor = 1.0 / 6.0;
     189             :             break;
     190       31968 :           case EChannelType::EDGE:
     191             :             factor = 1.0 / 4.0;
     192       31968 :             break;
     193             :           case EChannelType::CORNER:
     194             :             factor = 1.0 / 6.0;
     195             :             break;
     196             :           default:
     197             :             return 0.0; // handle invalid subch_type if needed
     198             :         }
     199      399456 :         for (auto i_pin : _mesh.getChannelPins(i_ch))
     200             :         {
     201      283968 :           heat_rate += factor * _ref_qprime(i_pin) * _pin_power_correction(i_pin) *
     202      283968 :                        _axial_heat_rate.value(_t, P);
     203             :         }
     204      115488 :         return heat_rate;
     205             :       }
     206             :     }
     207             :   }
     208             :   else
     209             :     return 0.0;
     210             : }