What Is HGsystem ??

HGSYSTEM is a suite of programs for assessing dispersion of vapour from gas, liquid or 2 phase releases including multi-component mixtures. HGSYSTEM was first assembled to model the release of Hydrogen Fluoride (HF) and ideal gases (Version 1.0) and then extended to include multicomponent mixtures (version 3.0). HGSYSTEM has been developed by Shell Research Ltd with the support and sponsorship of industry groups.

HGSYSTEM/UF₆ is a collaborative development of HGSYSTEM by Lockheed Martin Energy Systems and Earth Technology, sponsored by the United States Department of Energy (DoE), to predict the dispersion of the hydrolysis products of Uranium Hexafluoride. HGSYSTEM/UF₆ is supported at Oak Ridge National Laboratory (a Lockheed Martin Energy Research Corporation facility) via funding from DoE and is available from the US Department of Energy's Energy Science and technology Software Centre (ESTSC).

HGSYSTEM is a collection of computer programs designed to predict the source-term and
subsequent dispersion of accidental chemical releases with an emphasis on denser-than-air
Capabilities (dense gas) behavior. Multi-component releases may be modeled as well as chemicals that exhibit non-ideal behavior. Chemical reactivity may be modeled for hydrogen fluoride (HF) and uranium hexafluoride (UF6) in HGSYSTEM-UF6. This version of HGSYSTEM includes all of the features and capabilities contained in HGSYSTEM 3.0 plus several code enhancements, including the addition of chemistry and thermodynamic modules simulating UF6 hydrolysis reaction influence on plume characteristics and dispersion. HGSYSTEM offers a broad spectrum of accidental release modeling capabilities.