Hazards Analysis, Code Compliance & Procedure Development

Services to identify process safety hazards and facilitate compliance with established standards and codes.

Combustible Dust Testing

Laboratory testing to quantify dust explosion and reactivity hazards

Flammable Gas & Vapor Testing

Laboratory testing to quantify explosion hazards for vapor and gas mixtures

Chemical Reactivity Testing

Laboratory testing to quantify reactive chemical hazards, including the possibility of material incompatibility, instability, and runaway chemical reactions

ISO Accreditation and Scope
Fauske & Associates fulfills the requirements of ISO/IEC 17025:2017 in the field of Testing
DIERS Methodology

Design emergency pressure relief systems to mitigate the consequences of unwanted chemical reactivity and account for two-phase flow using the right tools and methods

Deflagrations (Dust/Vapor/Gas)

Properly size pressure relief vents to protect your processes from dust, vapor, and gas explosions

Effluent Handling

Pressure relief sizing is just the first step and it is critical to safety handle the effluent discharge from an overpressure event

Thermal Stability

Safe storage or processing requires an understanding of the possible hazards associated with sensitivity to variations in temperature


Classification of hazardous materials subject to shipping and storage regulations

Safety Data Sheets

Develop critical safety data for inclusion in SDS documents


Model transport of airborne virus aerosols to guide safe operations and ventilation upgrades


Model transport of contamination for source term and leak path factor analysis

Fire Analysis

Model transport of heat and smoke for fire analysis

Flammable or Toxic Gas

transport of flammable or toxic gas during a process upset

OSS consulting, adiabatic & reaction calorimetry and consulting

Onsite safety studies can help identify explosibility and chemical reaction hazards so that appropriate testing, simulations, or calculations are identified to support safe scale up

Mechanical, Piping, and Electrical

Engineering and testing to support safe plant operations and develop solutions to problems in heat transfer, fluid flow, electric power systems

Battery Safety

Testing to support safe design of batteries and electrical power backup facilities particularly to satisfy UL9540a ed.4

Hydrogen Safety

Testing and consulting on the explosion risks associated with devices and processes which use or produce hydrogen

Spent Fuel

Safety analysis for packaging, transport, and storage of spent nuclear fuel

Decommissioning, Decontamination and Remediation (DD&R)

Safety analysis to underpin decommissioning process at facilities which have produced or used radioactive nuclear materials

Laboratory Testing & Software Capabilities

Bespoke testing and modeling services to validate analysis of DD&R processes

Nuclear Overview

Our Nuclear Services Group is recognized for comprehensive evaluations to help commercial nuclear power plants operate efficiently and stay compliant.

Severe Accident Analysis and Risk Assessment

Expert analysis of possible risk and consequences from nuclear plant accidents

Thermal Hydraulics

Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions

Environmental Qualification (EQ) and Equipment Survivability (ES)

Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions

Laboratory Testing & Software Capabilities

Testing and modeling services to support resolution of emergent safety issues at a power plant

Adiabatic Safety Calorimeters (ARSST and VSP2)

Low thermal inertial adiabatic calorimeters specially designed to provide directly scalable data that are critical to safe process design

Other Lab Equipment and Parts for the DSC/ARC/ARSST/VSP2 Calorimeters

Products and equipment for the process safety or process development laboratory


Software for emergency relief system design to ensure safe processing of reactive chemicals, including consideration of two-phase flow and runaway chemical reactions


Facility modeling software mechanistically tracks transport of heat, gasses, vapors, and aerosols for safety analysis of multi-room facilities


Our highly experienced team keeps you up-to-date on the latest process safety developments.

Process Safety Newsletter

Stay informed with our quarterly Process Safety Newsletters sharing topical articles and practical advice.


With over 40 years of industry expertise, we have a wealth of process safety knowledge to share.

Waste Management, Decontamination & Decommissioning (D&D) Process Engineering

BackgroundWaste Technology Flow Chart

Fauske & Associates, LLC (FAI) provides technical expertise and program guidance for the storage, processing and disposal of nuclear, chemical and defense waste and for process and safety analysis to support Decontamination & Decommissioning (D&D) of nuclear and hazardous material facilities.  Our three product areas for waste technology and D&D are (1) Process and safety models and analyses (2) Experimental facilities for hazard quantification and (3) The FAI developed and maintained FATETM software.  FATETM is used for process design and safety evaluations related to waste technology, process engineering and safety and decommissioning and dismantling.  It can consider engineering process components as well as facility design.


  • FATETM software for process and facility design and safety calculations
  • Facility flow, heat transfer and toxic/radiological materials transport
  • Chemical and thermal behavior during waste processing, shipping and storage
  • Flammability gases and vapors/combustibility of dusts
  • Facility fire analysis including toxic/radiological effects
  • Chemical reaction propagation limits, including pyrophoricity
  • Chemical reaction rates, pressurization and radiolysis
  • Aerosol generation, transport, deposition and removal
  • Facility emissions and source terms for processes, accidents and Decontamination & Decommissioning (D&D)



  • Vacuum drying of metallic uranium particles from spent nuclear fuel
  • Shipping and storage of uranium-metal bearing spent fuel sludge including detailed container design
  • High temperature passivation of uranium-metal bearing spent fuel sludge
  • Vacuum drying of 2000 metric tons metallic spent nuclear fuel
  • Vitrification plant waste tank and ventilation system pressure and flow
  • Mixed oxide (MOX) facility fire and source term analysis including soot loading
  • Dry storage of Strontium/Cesium salt capsules
  • Storage tank hydrogen explosion and source term
  • Underground storage tank solvent vapor explosion and source term
  • Storage tank thermal response to loss of cooling
  • Nuclear power plant detailed fire modeling


Using FATETM software, FAI can calculate temperatures, pressures, flow rates and compositions for fluids, gases and structures associated with Fate Softwarewaste management process Decontamination & Decommissioning (D&D).  It is uniquely suited to nuclear facility operations because it combines models for fluid flow and heat transfer with models for aerosol transport and deposition, explosions and fire.  FATETM has been applied to dozens of United States Department of Energy (DOE) and commercial nuclear applications and its predecessor code was awarded a DOE Silver Award for Technology Innovation at Hanford.


  • Imperfect heating, ventilation and air conditioning (HVAC), or open doorways or vents
  • Partial or complete loss of power impact on facility conditions
  • Explosion and fire effects on tanks, equipment and cables
  • Soot loading on filters affecting dispersal of toxic materials


  • Spent fuel Pool Closure Project: Project databook; technical basis for sludge processing, shipping and storage; radiolysis and flammable gas behavior
  • Mixed Oxide Facility: Fire and contamination release analysis
  • Plutonium Finishing Plant: Aerosol release evaluation support against downwinder lawsuit; experimental data for reaction rates and pressurization
  • Spent Nuclear Fuel Project: Technical basis documents for pyrophoricity, fuel processing, shipping and storage, radiolysis and flammable gas behavior
  • Tank Waste Remediation Systems: Experimental data for closure of ferrocyanide and organic-nitrate waste issues, calculations for solvent vapor, flammable gas and source terms   
  • Waste Encapsulation and Storage Facility: Capsule advisory panel for technical basis for Strontium/Cesium capsule storage
  • Waste Receiving and Packaging Facility: Fire and contamination release analysis
  • Waste Treatment Vitrification Plan: Explosive hazards analysis, due diligence review and management transition team member

FATE Facility Flow Aerosol Thermal Explosion Model

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