BREEZE Incident Analyst Tech Sheet

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Information about BREEZE Incident Analyst Tech Sheet

Published on June 27, 2016

Author: BREEZESoftware


1. Accidental Release Modeling Software for EHS Professionals BREEZE® Incident Analyst incorporates a suite of industry- standard neutrally buoyant and dense toxic gas dispersion models to predict chemical concentration and flammability levels; thermal radiation fire models to predict radiation fluxes and temperature rise; and explosion models to predict blast force overpressures from vapor cloud explosions. BREEZE Incident Analyst includes the following toxic dispersion,fire,and explosion models: • DEGADIS • SLAB • INPUFF • AFTOX • Confined & Unconfined Pool Fire • BLEVE • U.S.Army TNT Equivalency • U.K.HSE TNT Equivalency • TNO Multi-Energy • Baker-Strehlow In addition to the technical capabilities,BREEZE Incident Analyst is easy to use and quick to run. An intuitive interface guides the user through entering required and optional inputs associated with a potential chemical release (e.g.,size and position of tank rupture,shape of storage tank,spill volume, and existence of an impoundment basin),and selecting the appropriate algorithms. Results are provided in both tabular and graphical formats including 2D contour,3D volume,and time-series charts. Chemical Database BREEZE Incident Analyst includes a robust chemical database, containing essential information needed by its multiple models for more than 150 chemicals. Chemicals and chemical mixtures can easily be added or modified. From physical characteristics,such as boiling point and critical pressure,to exposure hazard levels,such as Immediately Dangerous to Life and Health (IDLH) values,Incident Analyst’s database saves users time when searching for and specifying chemical data. Source Term Wizard The powerful Source Term Wizard automatically calculates the release properties to recommend an appropriate dispersion model for your scenario. Whether you are modeling an accident in real-time or planning for potential scenarios,the Source Term Wizard guides you through an important step in the modeling analysis. Maps The point-and-click interface of BREEZE Incident Analyst allows users to effortlessly add objects to their modeling runs through the Map Objects tab. Additionally,users may upload a basemap to their project through the Base Maps tab to show model objects,such as sources and receptors,superimposed over their site. Results Tab and BREEZE 3D Analyst Integration BREEZE Incident Analyst includes a robust set of model outputs. A Results Summary file provides a quick look at the most critical results. Incident Analyst is fully integrated with the BREEZE 3D Analyst program and provides several options for visualizing results including image results overlaid on a map,animated results,or export results to Google Earth,Surfer, ArcGIS shapefiles,or scalable vector graphics (SVG) files. Dispersion Models BREEZE Incident Analyst includes four dispersion models for analyzing accidental releases of toxic chemicals. The program is ideal for emergency response and planning as Incident Analyst BREEZE Incident Analyst provides many powerful modeling tools in an intuitive user-friendly interface.

2. BREEZE is a registered trademark of Trinity Consultants Incorporated. ©2015. All Rights Reserved. A Division of Trinity Consultants P +1 (972) 661-8881 | F +1 (972) 385-9203 | well as modeling accidental release scenarios for regulatory programs such as U.S.EPA's Risk Management Program (RMP). DEGADIS –Estimates concentrations downwind from an accidental chemical release where the dispersing toxic or flammable substance is initially heavier than air SLAB –Dense gas dispersion model that is used to estimate pollutant concentrations downwind from an accidental chemical release INPUFF –Gaussian puff model that simulates the atmospheric dispersion of neutrally buoyant or buoyant chemical releases from vertical stack or jet sources AFTOX –Gaussian puff/plume dispersion model that estimates concentrations downwind from accidental chemical releases where the dispersing plume has the same density as air Explosion Models If a quantity of flammable material is released,it will mix with the air and may result in a flammable vapor cloud. If this flammable vapor cloud finds an ignition source,a vapor cloud explosion may result. BREEZE Incident Analyst includes four explosion models for these vapor cloud explosion scenarios. U.S.ArmyTNT Equivalency –Uses a proportional relationship between the flammable mass in the cloud and an equivalent weight of TNT,and assumes the entire flammable mass is involved in the explosion and is centered at a single location U.K.HSE TNT Equivalency –Uses a proportional relationship between the flammable mass in the cloud and an equivalent weight of TNT TNO Multi-Energy –Treats the explosive potential of the vapor cloud as a corresponding number of equivalent fuel-air charges Baker-Strehlow –Accounts for variability in blast strength by simulating the explosion as a number of fuel-air charges, each with individual characteristics. It also accounts for the degree of confinement,flame speed,ground reflection,and the number of directions in which the blast can expand. Fire Models BREEZE Incident Analyst models a wide range of conditions using three fire models. These models can calculate the thermal radiation level produced by the fire,including the radius within which a specified radiation level will be exceeded. Confined Pool Fire –Models a fire that occurs when liquid is ignited in a confined area such as a dike or a tank Unconfined Pool Fire –Models a fire that occurs when an unconfined spreading pool of liquefied fuel gas ignites BLEVE –Thermal radiation model simulates a fire that may result from the leak or rupture of a pipeline containing a compressed or liquefied gas under pressure For a demonstration of Incident Analyst or for more information,contact the BREEZE team at +1 (972) 661-8881 or with BREEZE 3D Analyst to seamlessly plot model results to Google Earth.

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