1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
\subsection{The {\tt ROD:} module}\label{sect:RODData}
The \moc{ROD:} module used for rod insertion gestion in PWR. This module creates a 3-D field for rod parameter in a fuel map. This local field contains, for each mesh, one coefficient describing the rod insertion for the considered mesh. These coefficients are chosen according to rod coefficients saved in the {\sc saphyb} or {\sc multicompo} object.\\
The \moc{ROD:} module specifications are:
\begin{DataStructure}{Structure \moc{ROD:}}
\dusa{FLMAP} \moc{:=} \moc{ROD:} \dusa{FLMAP} \moc{::} \dstr{descrod1}
\end{DataStructure}
\noindent where
\begin{ListeDeDescription}{mmmmmmmm}
\item[\dusa{FLMAP}] \texttt{character*12} name of the \dds{MAP} object that will contain the 3-D rod file. The \dusa{FLMAP} has to be modified for the module and must appear on both LHS and RHS.
\item[\dstr{descrod1}] structure describing the main input data to the \moc{ROD:} module. Note that this input data is mandatory and must be specified.
\end{ListeDeDescription}
\subsubsection{Main input data to the \moc{ROD:} module}\label{sect:rodmain}
A {\sl rod identification number} (RIN) is a local parameter (type real) assigned to each type of rod in the {\sc saphyb} or
{\sc multicompo} object. Black bars of 900 MW PWRs in France are made of AICN material (Silver-Indium-Cadmium). Black bars of 1300 MW, N4 and EPR PWRs in France are made of a section of B4C followed by a section of AICN (in yellow), as depicted in Fig.~\ref{fig:rod_pwr}.
\begin{figure}[h!]
\begin{center}
\includegraphics[scale=0.8]{Figures/rod_pwr.eps}
\caption{Presentation of a partially-inserted 2-part control rod.}\label{fig:rod_pwr}
\end{center}
\end{figure}
Recommended values are:
\vskip 0.2cm
\begin{tabular}{|c|l|}
\hline
RIN & type of bar \\
\hline
0 & AICG (grey bar, generally out at nominal power) \\
1 ($=$ \dusa{val1}) & rod extracted \\
2 & AICN (black bar, generally out or partly inserted) \\
3 & B4C (black bar, generally out or partly inserted) \\
\hline
\end{tabular}
\vskip 0.2cm
The rod identification number is interpolated over each axial mesh of the fuel map. A local parameter name \dusa{par1} is defined and their distributed values are computed by the {\tt ROD:} module as depicted in Fig.~\ref{fig:rod_pwr}. Local parameters \dusa{par1} are identified as {\sl ROD} in the figure. A local value of {\sl ROD} $=2.5$ corresponds to a mesh of the fuel map containing 50\% of AICN material and 50\% of B4C material.
\noindent
\begin{DataStructure}{Structure \dstr{descrod1}}
$[$ \moc{EDIT} \dusa{iprint} $]$\\
$[$ \moc{PARA} \dusa{par1} \dusa{val1} $]$ \\
$[$ \moc{LINS} \dusa{insm} $]$\\
$[$ \moc{STEP} \dusa{step} $]$\\
$[$ \moc{NRFB} \dusa{nrfb} $]$\\
$[$ \moc{RGRP} \\
~~~$\{$ \dusa{ngrp} \dusa{maxmix} \\
~~~~~ ((\dusa{hgrp}(i) \dusa{isrt(i)} \dusa{rin(i,1)} $[[$ \dusa{hmix}(i,j) \dusa{rin(i,j+1)} $]]$), i=1, \dusa{ngrp}, j=1, \dusa{lmix}-1) \\
~~~$|$ \dusa{nrmv} \\
~~~~~ ((\dusa{hgrp}(i) \dusa{isrt(i)}), i=1, \dusa{nrmv}) $\}$ \\
\moc{ENDRGRP} $]$\\
$[$ \moc{RMAP} \dusa{nass} \\
~~~ ((\dusa{hrod}(i,j)), i=1, \dusa{lx}, j=1,ly ) \\
\moc{ENDRMAP} $]$ \\
\moc{;}
\end{DataStructure}
\goodbreak
\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{PARA}] keyword used to indicate that the name of the record to be
contained the rod field will follow.
\item[\dusa{par1}] name of the rod record and local parameter to be created. This name must correspond to the rod name of the {\sc saphyb} or {\sc multicompo} object.
\item[\dusa{val1}] real value of the 3-D rod field \dusa{par1}. This value enables to initialise the field to a uniform value, corresponding to a core with no rod inserted.
\item[\moc{LINS}] keyword used to indicate the maximum number of insertion steps
for all rods.
\item[\dusa{insm}] real value of maximum rod insertion step.
\item[\moc{STEP}] keyword used to indicate the length of one rod step.
\item[\dusa{step}] real value of rod step length (in cm).
\item[\moc{NRFB}] keyword used to indicate the number of bottom-reflective meshes
in the core.
\item[\dusa{nrfb}] integer value of bottom-reflective meshes in the core.
\item[\moc{RGRP}] keyword used to define all rod groups present in the core.
\item[\dusa{ngrp}] integer value of the number of rod groups present in the core.
\item[\dusa{maxmix}] integer value of the maximum number of rod zones (for hybrid
rods with many materials).
\item[\dusa{nrmv}] integer value of the number of rod groups that rod insertion is modified.
\item[\dusa{hgrp}] \texttt{character*3} identification value for the rod group $i$.
\item[\dusa{isrt}] real value for the number of inserted steps for the rod group $i$.
\item[\dusa{rin}] real value for the rod identification number (RIN) considered from the {\sc saphyb} or {\sc multicompo} object.
\item[\dusa{hmix}] real value for the height (in cm) of the RIN considered.
If only one RIN is used to define the rod, \dusa{hmix} is not defined. If two or more RIN are used for one rod,
the values of the lower rod sections with $1\le j < \dusa{lmix}$ should be defined, as depicted in Fig.~\ref{fig:rod_pwr}.
\item[\dusa{lmix}] integer value for the number of \dusa{rin} for each rod group.
\item[\moc{ENDRGRP}] keyword used to indicate the end of rod groups definition.
\item[\moc{RMAP}] keyword used to define the position of each rod group inside the core.
\item[\dusa{nass}] integer value of number of assemblies inside the core.
\item[\dusa{hrod}] \texttt{character*3} identification value for the (i,j) position. Accepted
values are:
\begin{itemize}
\item \moc{|}, \moc{-} or \moc{-|-} for an unrodded assembly,
\item or a \texttt{character*3} identification value referring to the identification value of the rod group.
\end{itemize}
\item[\moc{ENDRMAP}] keyword used to indicate the end of rod group position map.
\end{ListeDeDescription}
\eject
|
