RELAP5 SUMMARIZATION
1.
Development History
AB811148157BL
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EM376772762CS
RELAP5 is a general system program for transient behavior analysis developed
by
Idaho
national
laboratory.
The
program
has
experienced
for
the
following
process:
1966
RELAPSE;
1968
RELAP2;
1971
RELAP3
and
1975
RELAP4.
The two
phase flow processing of these programs are all based on homogeneous model.
The
program
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s
final
version
is
RELAP4/MOD7,
which
is
promulgated
by
US
National Energy Software Center in 1980. After that, the researchers used two-fluid,
non-homogeneous
and
non-equilibrium
two-phase
model,
and
overcame
the
limitation
of
single
fluid
model
to
develop
the
RELAP5
program.
By
1995,
RELAP5/MOD2 version came out. On this basis, through improving and outspread,
RELAP5/MOD3
program
was
developed
successfully.
RELAP5
has
many
special
functions
for
PWR
thermal
hydraulic
analysis.
It
is
a
program
bases
on
one-dimensional
transient,
two
fluid,
six
equation
hydraulics,
one-dimensional
heat
conduction
and
point
pile
kinetics
model.
Furthermore,
it
apply
mass,
momentum and energy equations for water and steam respectively. In addition to
general component model of pump, catheter, injection pump, turbine, separator,
and
control
system,
RELAP5
also
includes
special
process
models
of
reflooding
heat transfer, gas gap thermal conductivity, choked flow, noncondensible gas.
RELAP5 is a general transient analysis program for thermal hydraulic system,
and its application scope includes: coolant loss accidents, running transient state,
power
supply
lose,
flow
loss
and
sub-cooling
transient
state.
After
a
certain