LFR Demonstrator (ALFRED) - Enea

LBE flow rate [kg/s]
• Analysis by RELAP5/Mod3.3 system
code to characterize the
performance of a wire spaced fuel
bundle relevant for MYRRHA facility
(i.e. heat exchange and pressure
drop) in shutdown conditions and
providing data for code validation.
• First application, to a simplified
representation of NACIE facility, of
the coupling between the RELAP5
thermal-hydraulic system code and
the CFD Fluent commercial code
6
5
4
3
2
1
0
RELAP+Fluent
RELAP
0 200 400 600 800 1000
Time [s]
Thermal-Hydraulic
Pre-test analysis of thermal-hydraulic
behaviour of the NACIE facility for the
characterization of a fuel pin bundle
7.5 m
Tmdpjun
615
TDPVOL
699
686 0.3 m
TDPVOL
610
3.9 m
0.8 m
J-185
K=0.5
J-203
1
8
0
HX2
186
HX1
J-207
1
9
0
2
0
0
2
0
6
J-183
k=1
J-187
170
J-157
K=2.2
210
160
1.25 m
1.0 m
TDPVOL
320
Br 150
An.
152
P
148
An. P
156 146
Pipe
120
Reference cell
for pressure data needed
for Fluent outlet b.c.
Reference junction
for flowrate data needed
for inlet Fluent b.c.
1
3
0
125
TDPVOL
112
TDPVOL
110
Pipe
100
Tmdpjun
405
J-105
J-215
Expansion
Vessel
Tmdpjun
115
0.765 m
Part of the nodalization of the primary loop
used for RELAP5 code in the coupled simulations
TDPVOL
(Ar)
410
0.05 m
1.25 m
Reference cell
for temperaure data
needed for inlet Fluent b.c.
Reference section
for flowrate and
temperaure data needed
for RELAP5 inlet b.c.
1.3 m
Reference section
for pressure data needed
for RELAP5 outlet b.c.
Pipe used for Fluent code
in the coupled simulations