Editing Input syntax manual (section)

=== set pcc ===
 '''set pcc''' ''MODE'' [ ''SSP SSC'' ]

 '''set pcc''' '''5''' ''PRED'' ''CORR'' [ ''SSP SSC'' ]

Sets the time integration method in burnup calculation. Input values:

{|
| <tt>''MODE''</tt>
| : time integration method (default value: 1)
|-
| <tt>''PRED''</tt>
| : predictor step integration scheme (0 = constant extrapolation, 1 = linear extrapolation)
|-
| <tt>''CORR''</tt>
| : corrector step integration scheme (1 = linear interpolation, 2 = quadratic interpolation)
|-
| <tt>''SSP''</tt>
| : number of substeps for predictor steps (default value: 1)
|-
| <tt>''SSC''</tt>
| : number of substeps for corrector steps (default value: 1)
|}

The possible settings for mode are:
::{| class="wikitable" style="text-align: left;"
! Mode
! Predictor method
! Corrector method
! Notes
|-
| <tt>0, CE</tt>
| Constant extrapolation
| -
| Serpent 1 without substeps - "Euler's method"
|-
| <tt>1, CELI</tt>
| Constant extrapolation
| Linear interpolation
| Serpent 1 without substeps - "old predictor-corrector method"
|-
| <tt>2, LE</tt>
| Linear extrapolation
| -
| -
|-
| <tt>3, LELI</tt>
| Linear extrapolation
| Linear interpolation
| -
|-
| <tt>4, LEQI</tt>
| Linear extrapolation
| Quadratic interpolation
| -
|-
| <tt>5</tt>
| Constant or linear extrapolation
| Linear or quadratic interpolation
| -
|-
| <tt>6, CECE</tt>
| Constant extrapolation
| Constant backwards extrapolation
| -
|}

<u>Notes:</u>
*Number of substeps could not be given for constant predictor or corrector before 2.1.32.
*Decay calculations were always calculated with single substep disregarding this input before 2.1.32.
*The first burnup step extrapolation is always constant and with only single substeps before 2.1.32.
*Version 2.2.0 includes the sub-step method for depletion calculations involving continuous reprocessing.
*The custom mode, <tt>''MODE''</tt> '''5''', accepts constant or linear extrapolation for the predictor step and linear or quadratic interpolation for the correct step.
*If linear extrapolation is used, the first time step is always calculated with constant extrapolation.
*If quadratic interpolation is used, the first and second time steps are always calculated with linear interpolation.