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          45 : SCMTriPowerAux::validParams()
      19             : {
      20          45 :   InputParameters params = AuxKernel::validParams();
      21          45 :   params.addClassDescription(
      22             :       "Computes axial power rate (W/m) assigned to the fuel pins in a triangular lattice "
      23             :       "arrangement");
      24          90 :   params.addRequiredParam<PostprocessorName>(
      25             :       "power", "The postprocessor or Real to use for the total power of the subassembly [W]");
      26          90 :   params.addRequiredParam<std::string>(
      27             :       "filename", "name of radial power profile .txt file (should be a single column) [UnitLess].");
      28          90 :   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          45 :   return params;
      33           0 : }
      34             : 
      35          24 : SCMTriPowerAux::SCMTriPowerAux(const InputParameters & parameters)
      36             :   : AuxKernel(parameters),
      37          48 :     _triMesh(SCM::getConstMesh<TriSubChannelMesh>(_mesh)),
      38          24 :     _power(getPostprocessorValue("power")),
      39          24 :     _numberoflines(0),
      40          72 :     _filename(getParam<std::string>("filename")),
      41          48 :     _axial_heat_rate(getFunction("axial_heat_rate"))
      42             : {
      43          24 :   if (processor_id() > 0)
      44           6 :     return;
      45          18 :   if (!_triMesh.pinMeshExist())
      46           0 :     mooseError(name(), ": This object requires a pin mesh.");
      47             : 
      48          18 :   auto n_pins = _triMesh.getNumOfPins();
      49             :   // Matrix sizing
      50          18 :   _power_dis.resize(n_pins, 1);
      51          18 :   _power_dis.setZero();
      52          18 :   _pin_power_correction.resize(n_pins, 1);
      53          18 :   _pin_power_correction.setOnes();
      54             : 
      55             :   Real vin;
      56          18 :   std::ifstream inFile;
      57             : 
      58          18 :   inFile.open(_filename);
      59          18 :   if (!inFile)
      60           0 :     mooseError(name(), ": Unable to open file: ", _filename);
      61             : 
      62         360 :   while (inFile >> vin)
      63         342 :     _numberoflines += 1;
      64             : 
      65          18 :   if (inFile.fail() && !inFile.eof())
      66           0 :     mooseError(name(), ": Non numerical input at line: ", _numberoflines);
      67             : 
      68          18 :   if (_numberoflines != n_pins)
      69           0 :     mooseError(name(), ": Radial profile file doesn't have correct size: ", n_pins);
      70          18 :   inFile.close();
      71             : 
      72          18 :   inFile.open(_filename);
      73             :   int i = 0;
      74         360 :   while (inFile >> vin)
      75             :   {
      76         342 :     _power_dis(i, 0) = vin;
      77         342 :     i++;
      78             :   }
      79          18 :   inFile.close();
      80          18 : }
      81             : 
      82             : void
      83          48 : SCMTriPowerAux::initialSetup()
      84             : {
      85          48 :   if (processor_id() > 0)
      86          12 :     return;
      87             : 
      88          36 :   auto heated_length = _triMesh.getHeatedLength();
      89          36 :   auto sum = _power_dis.sum();
      90             :   // full (100%) power of one pin [W]
      91          36 :   auto fpin_power = _power / sum;
      92             :   // actual pin power [W]
      93          36 :   _ref_power = _power_dis * fpin_power;
      94             :   // Convert the actual pin power to a linear heat rate [W/m]
      95          36 :   _ref_qprime = _ref_power / heated_length;
      96             : 
      97          36 :   auto n_pins = _triMesh.getNumOfPins();
      98          36 :   auto nz = _triMesh.getNumOfAxialCells();
      99          36 :   auto z_grid = _triMesh.getZGrid();
     100          36 :   auto unheated_length_entry = _triMesh.getHeatedLengthEntry();
     101             : 
     102          36 :   _estimate_power.resize(n_pins, 1);
     103          36 :   _estimate_power.setZero();
     104        1488 :   for (unsigned int iz = 1; iz < nz + 1; iz++)
     105             :   {
     106             :     // Compute axial location of nodes.
     107        1452 :     auto z2 = z_grid[iz];
     108        1452 :     auto z1 = z_grid[iz - 1];
     109        1452 :     Point p1(0, 0, z1 - unheated_length_entry);
     110        1452 :     Point p2(0, 0, z2 - unheated_length_entry);
     111        1452 :     auto heat1 = _axial_heat_rate.value(_t, p1);
     112        1452 :     auto heat2 = _axial_heat_rate.value(_t, p2);
     113        1452 :     if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry) &&
     114         876 :         MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry + heated_length))
     115             :     {
     116             :       // cycle through pins
     117       14160 :       for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     118             :       {
     119             :         // Compute the height of this element.
     120       13452 :         auto dz = z2 - z1;
     121             : 
     122             :         // calculation of power for the first heated segment if nodes don't align
     123       13452 :         if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry) &&
     124             :             MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry))
     125             :         {
     126             :           heat1 = 0.0;
     127             :         }
     128             : 
     129             :         // calculation of power for the last heated segment if nodes don't align
     130       13452 :         if (MooseUtils::absoluteFuzzyGreaterThan(z2, unheated_length_entry + heated_length) &&
     131             :             MooseUtils::absoluteFuzzyLessThan(z1, unheated_length_entry + heated_length))
     132             :         {
     133             :           heat2 = 0.0;
     134             :         }
     135       13452 :         _estimate_power(i_pin) += _ref_qprime(i_pin) * (heat1 + heat2) * dz / 2.0;
     136             :       }
     137             :     }
     138             :   }
     139             : 
     140             :   // if a Pin has zero power (_ref_qprime(i_pin) = 0) then I need to avoid dividing by zero. I
     141             :   // divide by a wrong non-zero number which is not correct but this error doesn't mess things cause
     142             :   // _ref_qprime(i_pin) = 0.0
     143          36 :   auto total_power = 0.0;
     144         720 :   for (unsigned int i_pin = 0; i_pin < n_pins; i_pin++)
     145             :   {
     146         684 :     total_power += _estimate_power(i_pin);
     147         684 :     if (_estimate_power(i_pin) == 0.0)
     148           0 :       _estimate_power(i_pin) = 1.0;
     149             :   }
     150             :   // We need to correct the linear power assigned to the nodes of each pin
     151             :   // so that the total power calculated  by the trapezoidal rule agrees with the power assigned by
     152             :   // the user.
     153          36 :   _pin_power_correction = _ref_power.cwiseQuotient(_estimate_power);
     154          36 :   _console << "###########################################" << std::endl;
     155          36 :   _console << "Total power estimation by Aux kernel before correction: " << total_power << " [W] "
     156          36 :            << std::endl;
     157          36 :   _console << "Aux Power correction vector :\n" << _pin_power_correction << " \n";
     158          36 : }
     159             : 
     160             : Real
     161       16625 : SCMTriPowerAux::computeValue()
     162             : {
     163       16625 :   Point p = *_current_node;
     164       16625 :   auto heated_length = _triMesh.getHeatedLength();
     165       16625 :   auto unheated_length_entry = _triMesh.getHeatedLengthEntry();
     166             :   Point p1(0, 0, unheated_length_entry);
     167             :   Point P = p - p1;
     168             : 
     169             :   /// assign power to the nodes located within the heated section
     170       16625 :   if (MooseUtils::absoluteFuzzyGreaterEqual(p(2), unheated_length_entry) &&
     171       10070 :       MooseUtils::absoluteFuzzyLessEqual(p(2), unheated_length_entry + heated_length))
     172             :   {
     173        7790 :     auto i_pin = _triMesh.getPinIndexFromPoint(p);
     174        7790 :     return _ref_qprime(i_pin) * _pin_power_correction(i_pin) * _axial_heat_rate.value(_t, P);
     175             :   }
     176             :   else
     177             :     return 0.0;
     178             : }