http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
midloop operation benchmark test of the RELAP5/MOD3.2 code
A midloop operation test was performed in 1992 at the BETHSY
and temperature profiles, entrainment phenomena in the upper
and upper plenum. Large mass errors were generated by the
around 20% of the total system mass by the end of the
assess the performance of thermal hydraulic codes under the
but did not describe more specific thermal hydraulic
bypass, pressurizer manway, and steam generator manway. The
code predicted well the timing of the core uncovery and
conditions of low pressure and decay heat. The specific
conducted experimentally at the BETHSY facility and assess
errors in the prediction of component thermal hydraulic
head bypass and mass flow ratios between the upper head
in terms of predicting macroscopic trends and their timing,
in the pressurizer and at the steam generator. In
included predicting water holdup cycles in the pressurizer,
Integral Test Facility in Grenoble, France. The purpose of
integrated mass flow rate, and the emptying of the hot leg
its ability to accurately predict the observed phenomena.
maximum core heater cladding temperature, and the integrated
of these good predictions was the result of compensating
participation with the International Standard Problem #38,
phasic mass flow rates at the steam generator manway. Some
phenomena accurately. Specific areas of disagreement
phenomena. The consequence of the poor code performance in
predicting the pressurizer/pressurizer surge line phenomena
pressurization, an underestimation of the pressurizer
RELAP5/MOD3.2.1.1 release of this code. Typical errors were
removal system in a midloop operation with manways vents open
scenario of the test involved the loss of the residual heat
The overall conclusion is that the code performed quite well
the RELAP5/MOD3.2 code was used to simulate the transient
this experiment was to produce data that could be used to
two-phase mixture levels in the guide tube, upper core void
was a substantial delay in the falloff of the initial system
Issued also on microfiche from Lange Micrographics.