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.

Recent Posts

Integrating MAAP With Other Software Using the MAAP API

Posted by The Fauske Team 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, info@fauske.com. www.fauske.com

Subscribe to FAI's "Nuclear Technical Bulletin"

MAAP4 Hot Leg and Lower Head Failure Benchmarking




Topics: MAAP


Is My Dust Combustible?

A Flowchart To Help You Decide
Download Now