Combustible Dust Testing

Laboratory testing to quantify dust explosion and reactivity hazards

Safety Data Sheets

Develop critical safety data for inclusion in SDS documents

Gas and Vapor

Laboratory testing to quantify explosion hazards for vapor and gas mixtures

Classification of hazardous materials subject to shipping and storage regulations
Testing and consulting on the explosion risks associated with devices and processes which use or produce hydrogen
Safety Data Sheets

Develop critical safety data for inclusion in SDS documents

Thermal Stability

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

Adiabatic Calorimetry
Data demonstrate the consequences of process upsets, such as failed equipment or improper procedures, and guide mitigation strategies including Emergency Relief System (ERS) design
Reaction Calorimetry
Data yield heat and gas removal requirements to control the desired process chemistry
Battery Safety

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

Safety Data Sheets

Develop critical safety data for inclusion in SDS documents

Cable Testing
Evaluate electrical cables to demonstrate reliability and identify defects or degradation
Equipment Qualification (EQ)
Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions
Water Hammer
Analysis and testing to identify and prevent unwanted hydraulic pressure transients in process piping
Acoustic Vibration
Identify and eliminate potential sources of unwanted vibration in piping and structural systems
Gas & Air Intrusion
Analysis and testing to identify and prevent intrusion of gas or air in piping systems
ISO/IEC 17025:2017

Fauske & Associates fulfills the requirements of ISO/IEC 17025:2017 in the field of Testing

ISO 9001:2015
Fauske & Associates fulfills the requirements of ISO 9001:2015
Dust Hazards Analysis
Evaluate your process to identify combustible dust hazards and perform dust explosion testing
On-Site Risk Management
On-site safety studies can help identify explosibility and chemical reaction hazards so that appropriate testing, simulations, or calculations are identified to support safe scale up
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 safely handle the effluent discharge from an overpressure event

FATE™ & Facility Modeling

FATE (Facility Flow, Aerosol, Thermal, and Explosion) is a flexible, fast-running code developed and maintained by Fauske and Associates under an ASME NQA-1 compliant QA program.

Mechanical, Piping, and Electrical
Engineering and testing to support safe plant operations and develop solutions to problems in heat transfer, fluid, flow, and electric power systems
Hydrogen Safety
Testing and consulting on the explosion risks associated with devices and processes which use or produce hydrogen
Thermal Hydraulics
Testing and analysis to ensure that critical equipment will operate under adverse environmental conditions
Nuclear Safety
Our Nuclear Services Group is recognized for comprehensive evaluations to help commercial nuclear power plants operate efficiently and stay compliant
Radioactive Waste
Safety analysis to underpin decomissioning process at facilities which have produced or used radioactive nuclear materials
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.

Recent Posts

Integrating MAAP With Other Software Using the MAAP API

Posted by Fauske & Associates on 06.19.17

By Nick Karancevic, Senior Nuclear Engineer, Fauske & Associates, LLC 

MAAP 5.0 is an Electric Power Research Institute (EPRI) software program that performs severe computer-1.jpgaccident analysis for nuclear power plants including assessments of core damage and radiological transport. A valid license to MAAP 5.0 from EPRI for customer’s use of MAAP 5.0 is required prior to a customer being able to use MAAP 5.0 or incorporate MAAP5 into a simulator. Such implementation requires not just knowledge about the software operation, but also an understanding of the uncertainties associated with severe accident progression.

Fauske & Associates, LLC (FAI) has helped many nuclear utility-based customers to integrate the MAAP software into nuclear power full scope simulators (working synergistically with the nuclear plant’s probabilistic risk assessment, or PRA group), and to integrate more detailed plant software in lieu of MAAP models for things such as the balance of plant (BOP) and engineered safeguard features (ESF).

The Modular Accident Analysis Program (MAAP) – an EPRI owned and licensed computer software – is a fast-running computer code that simulates the plant response to various accident transients (both severe and abnormal) for light water and heavy water moderated nuclear power plants, for both current designs and many Advanced Light Water Reactor (ALWR) designs. Available for the LWR MAAP 5.04 and later (Windows) versions, the MAAP API (Application Programming Interface) allows MAAP software to be integrated out-of-the-box into a nuclear power plant (NPP) full scope simulator, or another executive software. Typical MAAP runs involve an end user clicking a “Start” button, and waiting for the MAAP run to finish. Using MAAP as an integrated software module allows an end user to have much more detailed control over MAAP execution, controlling its state during each time step. The end user can control when the MAAP simulation timestep is advanced, or change any MAAP input, at any time during the simulation, without primarily relying on text files to define MAAP sequence progression.

Nuclear power plant full scope simulators (FSS) vary in simulation domain, and may or may not have the ability to model severe accidents. FAI has helped integrate the MAAP software into numerous FSSs, to allow for operator training beyond reactor core uncovery, heatup, and degradation of the nuclear fuel and fuel cladding. The MAAP software can be used to show simultaneous responses of multiple NPP units, as well as the spent fuel pool (subject to modeling limitations associated with common junctions between units).

Any existing MAAP models developed for probabilistic risk analysis (PRA) can often be used synergistically to lower the cost of FSS integration. An existing PRA MAAP parameter file can be used as a starting point for the MAAP FSS integration. Furthermore, the resulting MAAP parameter file from an NPP MAAP integration project can be used as a basis for PRA analysis with a newer MAAP code version.

Occasionally, users may want to bypass parts of the MAAP software, potentially running other software side-by-side. The MAAP API can be used to easily enhance a portion of the MAAP software that requires more detailed analysis. For example, detailed codes are able to model NPP engineered safeguard fidelity beyond common MAAP usage requirements. With the MAAP API, FAI can join the two (or more) codes in a very cost-effective way, reducing the transitions between those codes to an information statement that an end user of the combined code will see in an output file (i.e. the transition between codes/models is invisible to the user).

FAI has the experience and in-depth knowledge to support a successful simulator upgrade. For more information, contact: Nick Karancevic, Senior Nuclear Engineer, 877-328-7531,

Subscribe to FAI's "Nuclear Technical Bulletin"

MAAP4 Hot Leg and Lower Head Failure Benchmarking




Topics: Nuclear


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