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 "SCMQuadPowerIC.h"
      11             : #include "Function.h"
      12             : #include "QuadSubChannelMesh.h"
      13             : 
      14             : using namespace std;
      15             : using namespace Eigen;
      16             : 
      17             : registerMooseObject("SubChannelApp", SCMQuadPowerIC);
      18             : registerMooseObjectRenamed("SubChannelApp", QuadPowerIC, "06/30/2025 24:00", SCMQuadPowerIC);
      19             : 
      20             : InputParameters
      21         419 : SCMQuadPowerIC::validParams()
      22             : {
      23         419 :   InputParameters params = QuadSubChannelBaseIC::validParams();
      24         419 :   params.addClassDescription("Computes axial heat rate (W/m) that goes into the subchannel cells "
      25             :                              "or is assigned to the fuel pins, in a square lattice arrangement");
      26             :   // params.addRequiredParam<Real>("power", "The total power of the subassembly [W]");
      27         838 :   params.addRequiredParam<PostprocessorName>(
      28             :       "power", "The postprocessor or Real to use for the total power of the subassembly [W]");
      29         838 :   params.addRequiredParam<std::string>(
      30             :       "filename", "name of radial power profile .txt file (should be a single column) [UnitLess].");
      31         838 :   params.addParam<FunctionName>(
      32             :       "axial_heat_rate",
      33             :       "1.0",
      34             :       "user provided normalized function of axial heat rate [Unitless]. "
      35             :       "The integral over pin heated length should equal the heated length");
      36         419 :   return params;
      37           0 : }
      38             : 
      39         223 : SCMQuadPowerIC::SCMQuadPowerIC(const InputParameters & params)
      40             :   : QuadSubChannelBaseIC(params),
      41         223 :     _power(getPostprocessorValue("power")),
      42         223 :     _numberoflines(0),
      43         669 :     _filename(getParam<std::string>("filename")),
      44         446 :     _axial_heat_rate(getFunction("axial_heat_rate"))
      45             : {
      46         223 :   if (processor_id() > 0)
      47          68 :     return;
      48             : 
      49         155 :   auto nx = _mesh.getNx();
      50         155 :   auto ny = _mesh.getNy();
      51         155 :   auto heated_length = _mesh.getHeatedLength();
      52             : 
      53         155 :   _power_dis.resize((ny - 1) * (nx - 1), 1);
      54         155 :   _power_dis.setZero();
      55         155 :   _pin_power_correction.resize((ny - 1) * (nx - 1), 1);
      56         155 :   _pin_power_correction.setOnes();
      57             : 
      58             :   Real vin;
      59         155 :   ifstream inFile;
      60             : 
      61         155 :   inFile.open(_filename);
      62         155 :   if (!inFile)
      63           0 :     mooseError(name(), "unable to open file : ", _filename);
      64             : 
      65        2128 :   while (inFile >> vin)
      66        1973 :     _numberoflines += 1;
      67             : 
      68         155 :   if (inFile.fail() && !inFile.eof())
      69           0 :     mooseError(name(), " non numerical input at line : ", _numberoflines);
      70             : 
      71         155 :   if (_numberoflines != (ny - 1) * (nx - 1))
      72           0 :     mooseError(name(), " Radial profile file doesn't have correct size : ", (ny - 1) * (nx - 1));
      73         155 :   inFile.close();
      74             : 
      75         155 :   inFile.open(_filename);
      76             :   int i(0);
      77        2128 :   while (inFile >> vin)
      78             :   {
      79        1973 :     _power_dis(i, 0) = vin;
      80        1973 :     i++;
      81             :   }
      82         155 :   inFile.close();
      83         155 :   _console << " Power distribution matrix :\n" << _power_dis << " \n";
      84             : 
      85         155 :   auto sum = _power_dis.sum();
      86             :   // full (100%) power of one pin [W]
      87         155 :   auto fpin_power = _power / sum;
      88             :   // actual pin power [W]
      89         155 :   _ref_power = _power_dis * fpin_power;
      90             :   // Convert the actual pin power to a linear heat rate [W/m]
      91         155 :   _ref_qprime = _ref_power / heated_length;
      92         155 : }
      93             : 
      94             : void
      95         195 : SCMQuadPowerIC::initialSetup()
      96             : {
      97         195 :   if (processor_id() > 0)
      98          62 :     return;
      99         133 :   auto nx = _mesh.getNx();
     100         133 :   auto ny = _mesh.getNy();
     101         133 :   auto n_pins = (nx - 1) * (ny - 1);
     102         133 :   auto nz = _mesh.getNumOfAxialCells();
     103         133 :   auto z_grid = _mesh.getZGrid();
     104         133 :   auto heated_length = _mesh.getHeatedLength();
     105         133 :   auto unheated_length_entry = _mesh.getHeatedLengthEntry();
     106             : 
     107         133 :   _estimate_power.resize(n_pins, 1);
     108         133 :   _estimate_power.setZero();
     109        2447 :   for (unsigned int iz = 1; iz < nz + 1; iz++)
     110             :   {
     111             :     // Compute axial location of nodes.
     112        2314 :     auto z2 = z_grid[iz];
     113        2314 :     auto z1 = z_grid[iz - 1];
     114        2314 :     Point p1(0, 0, z1 - unheated_length_entry);
     115        2314 :     Point p2(0, 0, z2 - unheated_length_entry);
     116        2314 :     auto heat1 = _axial_heat_rate.value(_t, p1);
     117        2314 :     auto heat2 = _axial_heat_rate.value(_t, p2);
     118        2314 :     if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry) &&
     119        2084 :         MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry + heated_length))
     120             :     {
     121             :       // cycle through pins
     122       22728 :       for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     123             :       {
     124             :         // Compute the height of this element.
     125       20802 :         auto dz = z2 - z1;
     126             : 
     127             :         // calculation of power for the first heated segment if nodes don't align
     128       20802 :         if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry) &&
     129             :             MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry))
     130             :         {
     131             :           heat1 = 0.0;
     132             :         }
     133             : 
     134             :         // calculation of power for the last heated segment if nodes don't align
     135       20802 :         if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry + heated_length) &&
     136             :             MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry + heated_length))
     137             :         {
     138             :           heat2 = 0.0;
     139             :         }
     140             : 
     141       20802 :         _estimate_power(i_pin) += _ref_qprime(i_pin) * (heat1 + heat2) * dz / 2.0;
     142             :       }
     143             :     }
     144             :   }
     145             :   // if a Pin has zero power (_ref_qprime(i_pin) = 0) then I need to avoid dividing by zero. I
     146             :   // divide by a wrong non-zero number which is not correct but this error doesn't mess things cause
     147             :   // _ref_qprime(i_pin) = 0.0
     148         133 :   auto total_power = 0.0;
     149        1556 :   for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     150             :   {
     151        1423 :     total_power += _estimate_power(i_pin);
     152        1423 :     if (_estimate_power(i_pin) == 0.0)
     153         108 :       _estimate_power(i_pin) = 1.0;
     154             :   }
     155             :   // We need to correct the linear power assigned to the nodes of each pin
     156             :   // so that the total power calculated  by the trapezoidal rule agrees with the power assigned by
     157             :   // the user.
     158         133 :   _pin_power_correction = _ref_power.cwiseQuotient(_estimate_power);
     159         133 :   _console << "###########################################" << std::endl;
     160         133 :   _console << "Total power estimation by IC kernel before correction: " << total_power << " [W] "
     161         133 :            << std::endl;
     162         133 :   _console << "IC Power correction vector :\n" << _pin_power_correction << " \n";
     163         133 : }
     164             : 
     165             : Real
     166       58088 : SCMQuadPowerIC::value(const Point & p)
     167             : {
     168       58088 :   auto heated_length = _mesh.getHeatedLength();
     169       58088 :   auto unheated_length_entry = _mesh.getHeatedLengthEntry();
     170             :   Point p1(0, 0, unheated_length_entry);
     171             :   Point P = p - p1;
     172       58088 :   auto pin_mesh_exist = _mesh.pinMeshExist();
     173             : 
     174             :   /// assign power to the nodes located within the heated section
     175       58088 :   if (MooseUtils::absoluteFuzzyGreaterEqual(p(2), unheated_length_entry) &&
     176       53456 :       MooseUtils::absoluteFuzzyLessEqual(p(2), unheated_length_entry + heated_length))
     177             :   {
     178       51722 :     if (pin_mesh_exist)
     179             :     {
     180             :       // project axial heat rate on pins
     181       35072 :       auto i_pin = _mesh.getPinIndexFromPoint(p);
     182       35072 :       return _ref_qprime(i_pin) * _pin_power_correction(i_pin) * _axial_heat_rate.value(_t, P);
     183             :     }
     184             :     else
     185             :     {
     186             :       // project axial heat rate on subchannels
     187       16650 :       auto i_ch = _mesh.getSubchannelIndexFromPoint(p);
     188             :       // if we are adjacent to the heated part of the fuel Pin
     189             :       auto heat_rate = 0.0;
     190       52458 :       for (auto i_pin : _mesh.getChannelPins(i_ch))
     191             :       {
     192       35808 :         heat_rate += 0.25 * _ref_qprime(i_pin) * _pin_power_correction(i_pin) *
     193       35808 :                      _axial_heat_rate.value(_t, P);
     194             :       }
     195       16650 :       return heat_rate;
     196             :     }
     197             :   }
     198             :   else
     199             :     return 0.0;
     200             : }