\subsection{The \moc{SIM:} module}\label{sect:sim}

\vskip 0.2cm
The \moc{SIM:} module can perform a sequence of operations related to
fuel management in PWRs:
\begin{itemize}
\item simulate a refuelling and shuffling scheme and update the burnup distribution
accordingly. The refuelling scheme is specified directly in \moc{SIM:}.
\item increase the burnup using the power available in the \dusa{POWER} object
and compute the final instantaneous burnup of each assembly subdivision
\item modify a local parameter such as the Boron concentration in the coolant.
\end{itemize}

\noindent
The \moc{SIM:} module specification is:

\begin{DataStructure}{Structure \moc{SIM:}}\label{table:tsim}
\dusa{FMAP} $[$ \dusa{MLIB} $]$ \moc{:=} \moc{SIM:} \dusa{FMAP} $[$ \dusa{MLIB} $]~[$ \dusa{POWER} $]$ \\
\moc{::} \dstr{descsim}
\end{DataStructure}

\noindent where

\begin{ListeDeDescription}{mmmmmmmm}

\item[\dusa{FMAP}] \texttt{character*12} name of a \dds{fmap} object,
that will be updated by the \moc{SIM:} module. The \dusa{FMAP} object
must contain the instantaneous burnups for each assembly subdivision, a basic naval-coordinate
assembly layout and the weight of each assembly subdivision.

\item[\dusa{MLIB}] {\tt character*12} name of a {\sc microlib} (type {\tt L\_LIBRARY}) containing particularized isotope data. If this
object also appears on the RHS, it is open in modification mode and updated. Number densities of isotopes present in list \dusa{HISOT}
(see Sect.~\ref{sect:resinimain}) are recovered from a fuel cycle information directory of \dusa{FMAP} and saved in \dusa{MLIB} or
recovered from \dusa{MLIB} and saved in a fuel cycle information directory of \dusa{FMAP}.

\item[\dusa{POWER}] \texttt{character*12} name of a \dds{power} object
containing the channel and powers of the assembly subdivisions, previously computed by the
\moc{FLPOW:} module. The channel and powers of the assembly subdivisions are used by the
\moc{SIM:} module to compute the new burn-up of each assembly subdivision. If the powers
of the assembly subdivisions are previously specified with the module \moc{RESINI:}, you can burn
your core without a \dusa{POWER} object.

\item[\dstr{descsim}] structure describing the input data to the \moc{SIM:} module.

\end{ListeDeDescription}

\vskip 0.2cm
\subsubsection{Input data to the \moc{SIM:} module}\label{sect:strsim}

\noindent
Note that the input order must be respected.

\begin{DataStructure}{Structure \dstr{descsim}}
$[$ \moc{EDIT} \dusa{iprint} $]$ \\
$[$ \moc{CYCLE} \dusa{hcnew} $[$ \moc{FROM}  \dusa{hcold} $[$ \moc{BURN} $\{$ \dusa{indcycle} $|$ \dusa{burncycle} $\}~]~]$ \\
~~~~~$[~\{$ \moc{MAP} (\dusa{hx}(i), i=1, \dusa{lx} ) \\
~~~~~~~~~~~~       (\dusa{hy}(j), (\dusa{hcase}(i,j), i=1, \dusa{lx} ), j=1,ly ) $|$ \\
~~~~~~ \moc{QMAP} (\dusa{hx}(i), i=\dusa{lx}/2+1, \dusa{lx} ) \\
~~~~~~~~~~~~~       (\dusa{hy}(j), (\dusa{hcase}(i,j), i=\dusa{lx}/2+1, \dusa{lx} ), j=\dusa{ly}/2+1,ly ) $\}~]$ \\
~~~~~$[$ \moc{SPEC} $[[~[[$ \dusa{asmb1} $]]$ \\
~~~~~~~~$\{$ \moc{SET} \moc{AVGB} \dusa{avburn} $|$ \moc{SET} \moc{FUEL} \dusa{ifuel} $|$ \moc{FROM} \dusa{hcold2} \moc{AT} \dusa{asmb2} $[$ \moc{BURN} $\{$ \dusa{indcycle} $|$ \dusa{burncycle} $\}~]~\}$ \\
~~~~~~~~~~~~~~$]]~]$ \\
~~~~~$[$ \moc{DIST-AX} $[[~[[$ \dusa{asmb1} $]]$ \\
~~~~~~~~$\{$  \moc{SET} (\dusa{axn}(i), i=1,\dusa{nb}) $|$ \moc{FROM} \dusa{hcold2} \moc{AT} \dusa{asmb2} $[$ \moc{BURN} $\{$ \dusa{indcycle} $|$ \dusa{burncycle} $\}~]~\}$ \\
~~~~~~~~~~~~~~~~~~~$]]~]$ \\
~~~~~$[$ \moc{BURN-STEP} \dusa{rburn}  $|$ \moc{TIME} \dusa{rtime} $\{$ \moc{DAY} $|$ \moc{HOUR} $|$ \moc{MINUTE} $|$ \moc{SECOND} $\}$ $]$ \\
~~~~~$[$ \moc{SET-FOLLOW} $[$ \moc{BURN} $\{$ \dusa{indcycle} $|$ \dusa{burncycle} $\}~]~]$ \\
\moc{ENDCYCLE} $]$ \\
$[[$ \moc{COMPARE} \dusa{hc1} $[$ \moc{BURN} $\{$ \dusa{indcycle1} $|$ \dusa{burncycle1} $\}~]$ \dusa{hc2} $[$ \moc{BURN} $\{$ \dusa{indcycle2} $|$ \dusa{burncycle2} $\}~]$ \\
~~~~~~~$\{$ \moc{DIST-BURN}  {\tt >>} \dusa{epsburn} {\tt <<}  $|$ \moc{DIST-POWR}  {\tt >>} \dusa{epspowr} {\tt <<} $\}~]]$ \\
$[[$ \moc{SET-PARAM} \dusa{PNAME} \dusa{pvalue} $]]$ \\
;
\end{DataStructure}

\noindent where
\begin{ListeDeDescription}{mmmmmmmm}

\item[\moc{EDIT}] keyword used to set \dusa{iprint}.

\item[\dusa{iprint}] integer index used to control the printing on screen:
 = 0 for no print; = 1 for minimum printing (default value); for larger values of
\dusa{iprint} everything will be printed.

\item[\moc{CYCLE}] keyword defining operations based on the actual fuel cycle.

\item[\dusa{hcnew}] \texttt{character*12} identification name of the specific fuel cycle.

\item[\moc{FROM}] keyword defining the previous fuel cycle in case that some information
needs to be transmitted to the actual fuel cycle.

\item[\dusa{hcold}] \texttt{character*12} identification name of the previous fuel cycle.

\item[\moc{BURN}] keyword defining the burnup at which the assembly is recycled in the previous fuel cycle. By default, the
last burnup step is used.

\item[\dusa{indcycle}] integer index of the burnup step in the previous fuel cycle.

\item[\dusa{burncycle}] real value of the burnup in the previous fuel cycle.

\item[\moc{MAP}] keyword defining the assembly layout in naval-coordinate positions in the
actual fuel cycle. Here, \dusa{lx} and \dusa{ly} values are those defined in the fuel map
(see \Sect{resiniaram}).

\item[\moc{QMAP}] keyword defining the assembly layout in naval-coordinate positions using
quarter-core symmetry conditions. Here, the lower-right quarter is defined.
The full map is reconstructed through rotations around the center.

\item[\dusa{hx}] ordered list of available \texttt{character*1} prefixes for the $X$-oriented
naval-coordinate positions. Values are generally chosen between {\tt A} and {\tt T}.

\item[\dusa{hy}] ordered list of available \texttt{character*2} suffixes for the $Y$-oriented
naval-coordinate positions. Values are generally chosen between {\tt 01} and {\tt 17}.

\item[\dusa{hcase}] \texttt{character*4} or integer identification value for the (i,j) position. Accepted
values are:
\begin{itemize}
\item \moc{|}, \moc{-} or \moc{-|-} for a position outside the core,
\item \moc{NEW} for a new assembly (at zero burnup) selected according to the fuel map specified in Sect.~\ref{sect:resini},
\item \moc{SPC} for an assembly described later in the dataset using a \moc{SPEC} specification,
\item or a naval-coordinate position referring to the position of an assembly in cycle \dusa{hcold} that is
recycled in the current cycle,
\item \dusa{imix} for an assembly (at zero burnup) made of fuel mixture \dusa{imix}. The fuel mixture should be selected among integer values defined
in the fuel map {\tt GEO:/MIX} data of Table~\ref{table:descresini1}.
\end{itemize}

\item[\moc{SPEC}] keyword defining specifications related to all assemblies previously identified with
the \moc{SPC} keyword. If \moc{QMAP} keyword has been used with \moc{SPC} values, the 4 equivalent
assemblies must be specified (i.e. not only the lower-right quarter assembly).

\item[\dusa{asmb1}] \texttt{character*3} naval-coordinate position of an assembly identified with a \moc{SPC} keyword. Up to 30 coordinates can be set aside
if many assemblies have the same specification.

\item[\moc{SET}] keyword indicating that a user-defined value will be assigned to the assembly.

\item[\moc{AVGB}] keyword indicating that an averaged burnup will be assigned to the assembly.

\item[\dusa{avburn}] real value of the average burnup in MWd/t.

\item[\moc{FUEL}] keyword indicating that a new fuel assembly will be used.

\item[\dusa{fuel}] integer index of the fuel type corresponding to the new fuel assembly. Fuel type indices are those used in the
{\tt RESINI:} {\tt PLANE} descriptions of Sect.~\ref{sect:resini}.

\item[\moc{FROM}] keyword indicating that a value recovered from another assembly will be assigned to the current assembly.

\item[\dusa{hcold2}] \texttt{character*12} identification name of a previous fuel cycle.

\item[\moc{AT}] keyword indicating that the naval-coordinate position of the other assembly will be given.

\item[\dusa{asmb2}] \texttt{character*3} naval-coordinate position of the other assembly in cycle \dusa{hcold2}.

\item[\moc{DIST-AX}] keyword used to impose an axial burnup distribution to the assembly. The burnup distribution is recovered from an existing assembly or is set to
user-suppled values.

\item[\dusa{axn}] real values of the axial burnup distribution.

\item[\moc{BURN-STEP}] keyword used to indicate an increase of core average burn-up.

\item[\dusa{rburn}] keyword used to indicate in MWd/t the average increase
of burn-up in the core.

\item[\moc{TIME}] keyword used to indicate the time of combustion at the power specified
in \dusa{POWER} structure.

\item[\dusa{rtime}] keyword used to set the time combustion value in \moc{DAY} or \moc{HOUR}
or \moc{MINUTE} or \moc{SECOND}.

\item[\moc{DAY}] keyword used to specify that \dusa{rtime} is a number of days.

\item[\moc{HOUR}] keyword used to specify that \dusa{rtime} is a number of hours.

\item[\moc{MINUTE}] keyword used to specify that \dusa{rtime} is a number of minutes.

\item[\moc{SECOND}] keyword used to specify that \dusa{rtime} is a number of seconds.

\item[\moc{SET-FOLLOW}] keyword used to reset the number densities of particularized isotopes in the \dusa{hcnew} fuel cycle
information directory of the fuel map. The burnup step indicated by \moc{BURN} structure is used to store the particularized isotopes. By default,
the last burnup step is used. The {\sc microlib} \dusa{MLIB} must be defined in read-only mode in Table~\ref{table:tsim}.

\item[\moc{ENDCYCLE}] keyword indicating the end of data specific to the actual fuel cycle.

\item[\moc{COMPARE}] keyword for obtaining a CLE-2000 variable that is a measure of the discrepancy between two
cycles.

\item[\dusa{hc1}] \texttt{character*12} identification name of the first fuel cycle to compare.

\item[\dusa{hc2}] \texttt{character*12} identification name of the second fuel cycle to compare.

\item[\moc{DIST-BURN}]  keyword used to recover the discrepancy on burnup distribution in a CLE-2000 variable.

\item[\dusa{epsburn}] \texttt{character*12} CLE-2000 variable name in which the extracted burnup discrepancy (expressed in MW-day/tonne) will be placed.

\item[\moc{DIST-POWR}]  keyword used to recover the relative error on power distribution in a CLE-2000 variable.

\item[\dusa{epspowr}] \texttt{character*12} CLE-2000 variable name in which the extracted power relative error will be placed.

\item[\moc{SET-PARAM}] keyword used to indicate the input (or modification)
of the actual values for a parameter specified using its \dusa{PNAME}.

\item[\moc{PNAME}] keyword used to specify \dusa{PNAME}.

\item[\dusa{PNAME}] \texttt{character*12} name of a parameter.

\item[\dusa{pvalue}] single real value containing the actual
parameter's values. Note that this value will not be checked for consistency
by the module. It is the user responsibility to provide the valid parameter's value
which should be consistent with those recorded in the multicompo or Saphyb database.

\end{ListeDeDescription}
\clearpage