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+\subsection{The \moc{NEWMAC:} module}\label{sect:newmac}
+
+\vskip 0.2cm
+The \moc{NEWMAC:} module is used to create a complete \dds{macrolib}
+with respect to the devices parameters. The resulting \dds{macrolib} will
+contain the exact properties for every material region, over the whole
+mesh-splitted reactor geometry. The material properties of each region are
+recomputed with respect to the actual position of each rod-type and if present
+lzc-type device. The computing algorithm is based on the determination of the
+volumic fraction occupied by each device; the incremental cross sections are then
+adjusted, accordingly. Note that the \moc{NEWMAC:} module must be executed
+each time the devices positions are modified from the previously computed ones.\\
+
+\noindent
+The \moc{NEWMAC:} module specification is:
+
+\begin{DataStructure}{Structure \moc{NEWMAC:}}
+\dusa{MACRO3} \dusa{MATEX} \moc{:=} \moc{NEWMAC:}
+\dusa{MATEX} \dusa{MACRO2} \dusa{DEVICE}
+\moc{::} $[$ \moc{EDIT} \dusa{iprint} $]~[$ \moc{XFAC} \dusa{xfac} $]$ ;
+\end{DataStructure}
+
+\noindent where
+\begin{ListeDeDescription}{mmmmmmmm}
+
+\item[\dusa{MACRO3}] \texttt{character*12} name of the \dds{macrolib}
+to be created by the module. It will contain the updated properties of each
+material region with respect to the current position of each device.
+
+\item[\dusa{MATEX}] \texttt{character*12} name of the \dds{matex} object,
+containing the complete reactor material index including devices. \dusa{MATEX}
+must be specified in the modification mode; it will store the updated h-factors,
+computed per each fuel region with respect to the devices positions.
+
+\item[\dusa{MACRO2}] \texttt{character*12} name of the read-only extended
+\dds{macrolib}, previously created by the \moc{MACINI:} module.
+
+\item[\dusa{DEVICE}] \texttt{character*12} name of the read-only
+\dds{device} object containing the devices information and parameters.
+
+\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; larger values produce increasing amounts
+of output. The default value is \dusa{iprint} = 1.
+
+\item[\moc{XFAC}] keyword used to specify the number of cells on which incremental cross sections were computed 
+in the supercell code.
+
+\item[\dusa{xfac}] corrective factor for delta sigmas (real number). For DRAGON code, \dusa{xfac} is generally set to 2.0 and, for MULTICELL 
+code, set to 1.0 . The default value is 2.0. 
+
+\end{ListeDeDescription}
+\clearpage