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+\subsection{The \moc{DEVINI:} module}\label{sect:dev}
+
+\vskip 0.2cm
+The \moc{DEVINI:} module is used for the modeling of reactivity mecanisms, based
+on the devices specifications which are read from the input data file. The module will
+create a new \dds{device} object that will store the devices specifications and
+parameters (see \Sect{device}). Note that only the rod-type (i.e. solid) devices are
+considered using the \moc{DEVINI:} module; the liquid zone controllers can be added
+subsequently, using the \moc{LZC:} module (see \Sect{lzc}). A rod-type device is a
+reactivity controller rod (or plate), such as: a zone control rod (ZCR), a shutoff rod (SOR),
+etc. Several devices parameters can be modified using the \moc{DSET:} module (see \Sect{dset}).\\
+
+A device specification includes several controller rod parameters, such as: a rod position,
+rod insertion level, direction of movement, etc. The devices positions can not overlap in
+the reactor core; they are referred using \dusa{3-D}-Cartesian coordinates. The insertion
+level of rods can be set according to their nominal positions or they can be displaced
+\dusa{in} or \dusa{out} of core. The rods can also be divided into the several user-defined
+groups so that they can be manipulated, displaced or moved simultaneously.\\
+
+\noindent
+The \moc{DEVINI:} module specification is:
+
+\begin{DataStructure}{Structure \moc{DEVINI:}}
+\dusa{DEVICE} \dusa{MATEX} \moc{:=} \moc{DEVINI:}
+\dusa{MATEX} \moc{::} \dstr{descdev}
+\end{DataStructure}
+
+\noindent where
+
+\begin{ListeDeDescription}{mmmmmmmm}
+
+\item[\dusa{DEVICE}] \texttt{character*12} name of the \dds{device} object
+that will be created by the module; it will contain the devices information.
+
+\item[\dusa{MATEX}] \texttt{character*12} name of the \dds{matex} object
+that will be updated by the module. The rod-devices material mixtures are
+appended to the previous material index and the rod-devices indices are
+also modified, accordingly.
+
+\item[\dstr{descdev}] structure describing the input data to the
+\moc{DEVINI:} module.
+
+\end{ListeDeDescription}
+
+\vskip 0.2cm
+
+\subsubsection{Input data to the \moc{DEVINI:} module}\label{sect:devstr}
+
+The \moc{DEVINI:} module allows the definition of rod-type devices made of one or many (up to 10) parts,
+as depicted in Fig.~\ref{fig:rod}.
+
+\begin{figure}[h!]
+  \begin{center}
+    \includegraphics[scale=0.7]{Figures/rod.eps} 
+\caption{Presentation of fully- and partially-inserted 3-part control rods.}\label{fig:rod}
+  \end{center}
+\end{figure}
+
+\begin{DataStructure}{Structure \dstr{descdev}}
+$[$ \moc{EDIT} \dusa{iprint} $]$\\
+\moc{NUM-ROD} \dusa{nrod} $[~\{$ \moc{FADE} $|$ \moc{MOVE} $\}~]$ \\
+( \dstr{dev-rod},  i = 1, \dusa{nrod} ) \\
+$[$ \moc{CREATE}  \moc{ROD-GR} \dusa{ngrp}  ( \dstr{rod-group},  i = 1, \dusa{ngrp} ) $]$ \\
+;
+\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); larger values
+produce increasing amounts of output.
+
+\item[\moc{NUM-ROD}] keyword used to specify \dusa{nrod}.
+
+\item[\dusa{nrod}] integer total number of the reactor rod-type devices.
+This number must be greater than 0.
+
+\item[\moc{FADE}] fading rod keyword. A fraction of the fully inserted rod vanishes (default option).
+
+\item[\moc{MOVE}] moving rod keyword. The complete rod is moving (DONJON3-type movement).
+
+\item[\moc{CREATE}] keyword used to create the rod-groups of devices.
+The creation of groups is optional.
+
+\item[\moc{ROD-GR}] keyword used to set \dusa{ngrp}.
+
+\item[\dusa{ngrp}] integer total number of the rod groups to be created.
+This number must be greater than 0.
+
+\item[\dstr{dev-rod}] structure describing the input data for each individual rod.
+ 
+\item[\dstr{rod-group}] structure describing the input data for each group of rods.
+
+\end{ListeDeDescription}
+
+\vskip 0.2cm
+
+\subsubsection{Description of dev-rod input structure}\label{sect:devrodstr}
+
+A rod position is referred by its \dusa{3-D} Cartesian coordinates only.
+Note that the devices positions can not overlap. The input order of data
+must be respected.
+
+\begin{DataStructure}{Structure \dstr{dev-rod}}
+
+\moc{ROD} \dusa{id} \\
+~~\moc{ROD-NAME} \dusa{NAME} \\
+~~\moc{AXIS} $\{$ \moc{X} $|$ \moc{Y} $|$ \moc{Z} $\}$ \\
+~~\moc{FROM} $\{$ \moc{H+} $|$ \moc{H-} $\}$  \\
+~~$[$ \moc{LEVEL} \dusa{value} $]$ \\
+~~$[$ \moc{SPEED} \dusa{speed} $]$ \\
+~~$[$ \moc{TIME} \dusa{time} $]$ \\
+~~$[[$ \moc{MAXPOS}  (\dusa{pos}(i), i = 1, 6) \moc{DMIX} \dusa{mix1} \dusa{mix2} $]]$ \\
+\moc{ENDROD}
+\end{DataStructure}
+
+\noindent where
+\begin{ListeDeDescription}{mmmmmmmm}
+
+\item[\moc{ROD}] keyword used to specify the rod \dusa{id} number.
+
+\item[\dusa{id}] integer identification number of the current rod. Each
+rod-type device must be assigned a unique \dusa{id} number, given in
+an ascending order ranging from 1 to \dusa{nrod}.
+
+\item[\moc{ROD-NAME}] keyword used to specify the rod \dusa{NAME}.
+
+\item[\dusa{NAME}] \texttt{character*12} name of the current rod. In general,
+this name is composed by the rod specific type (e.g. SOR, ZCR, etc.) followed
+by its sequential number (e.g. 01, 02, etc.).
+
+\item[\moc{AXIS}] keyword used to specify the rod movement axis.
+A rod can be displaced along only one of the axis.
+
+\item[\moc{X}] keyword used to specify that a rod is displaced along X axis.
+
+\item[\moc{Y}] keyword used to specify that a rod is displaced along Y axis.
+
+\item[\moc{Z}] keyword used to specify that a rod is displaced along Z axis.
+
+\item[\moc{FROM}] keyword used to specify the insertion side of geometry.
+The rod-devices can be inserted into the reactor core from only one side of
+geometry. For example, some vertically moving devices can be inserted only
+from the top, whereas other only from the bottom.
+
+\item[\moc{H+}] keyword used to specify that a rod will be inserted into
+reactor core from the highest position (e.g. from the top for vertically moving
+rod-device).
+
+\item[\moc{H-}] keyword used to specify that a rod will be inserted into
+reactor core from the lowest position (e.g. from the bottom for vertically
+moving rod-device).
+
+\item[\moc{LEVEL}] keyword used to specify the actual rod insertion
+level \dusa{value}. By default, the rod insertion level is left undefined.
+
+\item[\dusa{value}] real positive value of the rod insertion level. This
+value is used to compute the actual rod position in the reactor core.
+The rod insertion level is minimal (\dusa{value} = 0.0) when the rod is
+completely withdrawn, and it is maximal (\dusa{value} = 1.0) when the
+rod is fully inserted. For the partially inserted rod the insertion level
+must be: 0.0 $<$ \dusa{value} $<$ 1.0
+
+\item[\moc{SPEED}] keyword used to specify \dusa{speed}. By default, the speed is left undefined.
+
+\item[\dusa{speed}] real positive value of the rod movement speed,
+given in cm/s. This value is needed only for the reactor regulating purpose.
+
+\item[\moc{TIME}] keyword used to specify \dusa{time}. By default, the insertion time is left undefined.
+
+\item[\dusa{time}] real value of time for the rod insertion (or extraction),
+given in sec. This value is needed only for the reactor regulating purpose.
+
+\item[\moc{MAXPOS}] keyword used to specify the full-inserted
+coordinates of a rod part. The sequence of \moc{MAXPOS} and \moc{DMIX} data structures is
+repeated for each part making the rod.
+
+\item[\dusa{pos}] real array containing 3-D Cartesian coordinates of the
+full-inserted rod. This is the limiting rod position in the reactor core, which
+may or may not be the same as the actual rod position. These coordinates
+must be given in the order: X$-$, X$+$, Y$-$, Y$+$, Z$-$, and Z$+$.
+
+\item[\moc{DMIX}] keyword used to specify \dusa{mix1} and \dusa{mix2}.
+
+\item[\dusa{mix1}] first of two integer rod mixture indices. Index \dusa{mix1} corresponds to the perturbed
+cross sections.
+
+\item[\dusa{mix2}] second of two integer rod mixture indices. Index \dusa{mix2} corresponds to the reference
+cross sections. Indices \dusa{mix1} and \dusa{mix2} will be used to compute
+the incremental cross sections in the \moc{NEWMAC:} module.
+
+\item[\moc{ENDROD}] keyword used to end the rod description.
+
+\end{ListeDeDescription}
+
+\subsubsection{Description of rod-group input structure}\label{sect:rodgroupstr}
+
+The partition of devices into groups is very useful when the same action is
+to be applied to several rods, e.g. setting of new parameters (using the
+\moc{DSET:} module) or rods moving (using the \moc{MOVDEV:} module).
+
+\begin{DataStructure}{Structure \dstr{rod-group}}
+
+\moc{GROUP-ID} \dusa{igrp} $\{$ \moc{ROD-ID}
+$[[$ \dusa{id} $]]$  $|$  \moc{ALL} $\}$ \\
+
+\end{DataStructure}
+
+\noindent where
+\begin{ListeDeDescription}{mmmmmmmm}
+
+\item[\moc{GROUP-ID}] keyword used to set \dusa{igrp} number.
+
+\item[\dusa{igrp}] integer identification number of a group to be created.
+Each rods group must be assigned a unique identification number, given
+in ascending order ranging from 1 to \dusa{ngrp}.
+
+\item[\moc{ROD-ID}] keyword used to set the rod \dusa{id} numbers.
+
+\item[\dusa{id}] integer identification numbers of rods which belong
+to the same group \dusa{igrp}. A particular rod (or several rods) may
+belong to different groups, but it could not be repeated inside the same
+group. The total number of rods in any group must be between
+1 and \dusa{nrod}.
+
+\item[\moc{ALL}] keyword used to specify that all rods
+will belong to the same group \dusa{igrp}.
+
+\end{ListeDeDescription}
+\clearpage