MTHAC | Thermal hydraulic simulation

Inputs

Native models: JSON network definition
Python & command line: Construct and run models and export results

RETRAN & RELAP5 support

Input profile	Supported model content
RETRAN-02MOD4 · declared profile	Selected volumes, junctions, source conductors, pumps, regional storage and explicit power adaptation.
RELAP5MOD3.2 · August 1995 ASCII8	Selected SNGLVOL, TMDPVOL, PIPE, SNGLJUN and TMDPJUN.
RELAP5MOD3.3	Native composite loading: selected SNGLVOL, TMDPVOL, SNGLJUN, PUMP and JETMIXER; thermal materials, native controls and prescribed-reactivity kinetics. Geometry inspection: selected SNGLVOL and TMDPVOL, without constructing an executable model.

Input profile

Supported model content

RETRAN-02MOD4 · declared profile

Selected volumes, junctions, source conductors, pumps, regional storage and explicit power adaptation.

RELAP5MOD3.2 · August 1995 ASCII8

Selected SNGLVOL, TMDPVOL, PIPE, SNGLJUN and TMDPJUN.

RELAP5MOD3.3

Native composite loading: selected SNGLVOL, TMDPVOL, SNGLJUN, PUMP and JETMIXER; thermal materials, native controls and prescribed-reactivity kinetics.

Geometry inspection: selected SNGLVOL and TMDPVOL, without constructing an executable model.

Source access

Access & export

MTHAC source access is subject to export control review. We require an End User Certificate before providing source access.

Peach Bottom Benchmark

The OECD/NRC turbine trip benchmark uses tests at the Peach Bottom Unit 2 power plant to study a BWR's response to a rapid turbine shutdown. Exercise 1 focuses on the thermal hydraulic system, with specified power or reactivity histories.

Read the benchmark report ↗

MTHAC calculationPublished comparison