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+\subsection{The \moc{XENON:} module}\label{sect:xenon}
+
+\vskip 0.2cm
+The \moc{XENON:} module is used to correct the Xenon distribution coming from an interpolation calculation.
+ This module computes the new densities according to the bundle flux, and the equation providing the balance concentration of Xenon-135  :
+
+\begin{eqnarray} \label{eqn:xe135eq}
+N_{X_{eq}}=\frac{(Y_I+Y_X) \Sigma_f \phi}{\lambda_X + \sigma_X \phi}
+\end{eqnarray}
+
+\noindent where
+\begin{itemize} 
+\item $Y_I$ is the fission yield of I135
+\item $Y_X$ is the fission yield of Xe135
+\item $\sigma_X$ is the capture cross section of Xe135
+\item $\lambda_X$ is the decay constant of Xe135
+\item $\Sigma_f$ is the total fission cross section
+\item $\phi$ is the bundle flux
+\end{itemize}
+
+\noindent
+The \moc{XENON:} module specification is:
+
+\begin{DataStructure}{Structure \moc{XENON:}}
+ \dusa{MICROLIB} \moc{:=} \moc{XENON:} \dusa{MICROLIB}
+$[$ \dusa{POWER} $]$  \\
+\moc{::} \dstr{descxenon}
+\end{DataStructure}
+
+\noindent where
+
+\begin{ListeDeDescription}{mmmmmmmm}
+
+\item[\dusa{MICROLIB}] \texttt{character*12} name of a \dds{library} object,
+that will be updated by the \moc{XENON:} module. The Xenon should be extracted in this library for the use of this module.
+
+\item[\dusa{POWER}] \texttt{character*12} name of a \dds{power} object
+containing the bundle fluxes, previously computed by the
+\moc{FLPOW:} module. The fluxes should be normalized to the reactor power.
+
+\item[\dstr{descxenon}] structure describing the input data to the \moc{XENON:} module.
+
+\end{ListeDeDescription}
+
+\vskip 0.2cm
+\subsubsection{Input data to the \moc{XENON:} module}\label{sect:strxenon}
+
+\noindent
+Note that the input order must be respected.
+
+\begin{DataStructure}{Structure \dstr{descxenon}}
+$[$ \moc{EDIT} \dusa{iprint} $]$ \\
+$[$ \moc{INIT} $]$ \\
+;
+\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.
+
+\item[\moc{INIT}] keyword used to indicate the initialization of the library for a recursive calculation using the \moc{XENON:} module. The Xenon concentration is set to zero for all the bundles.
+
+\end{ListeDeDescription}
+\clearpage